WO2017126443A1 - 多環芳香族化合物 - Google Patents
多環芳香族化合物 Download PDFInfo
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- WO2017126443A1 WO2017126443A1 PCT/JP2017/001089 JP2017001089W WO2017126443A1 WO 2017126443 A1 WO2017126443 A1 WO 2017126443A1 JP 2017001089 W JP2017001089 W JP 2017001089W WO 2017126443 A1 WO2017126443 A1 WO 2017126443A1
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- 0 CC1(*C2(C)c(cc(cc3)N(C4=CC=C(*)CC4)c4ccc(*)cc4)c3-c3cc(Oc4c(B56)c(O7)ccc4)c5cc23)c2cc(N(C3=CC=C(C)CC3)c3ccc(C)cc3)ccc2-c2c1cc6c7c2 Chemical compound CC1(*C2(C)c(cc(cc3)N(C4=CC=C(*)CC4)c4ccc(*)cc4)c3-c3cc(Oc4c(B56)c(O7)ccc4)c5cc23)c2cc(N(C3=CC=C(C)CC3)c3ccc(C)cc3)ccc2-c2c1cc6c7c2 0.000 description 7
- WKONGWURFRWTOH-UHFFFAOYSA-N CCCC(C=C(C=C1)N(c2ccccc2)c2ccccc2)C(C2C3C(C)C3)=C1c1c2cc2S3c(cccc4-c5ccccc5)c4OC(CC=C4)C3=C4Oc2c1 Chemical compound CCCC(C=C(C=C1)N(c2ccccc2)c2ccccc2)C(C2C3C(C)C3)=C1c1c2cc2S3c(cccc4-c5ccccc5)c4OC(CC=C4)C3=C4Oc2c1 WKONGWURFRWTOH-UHFFFAOYSA-N 0.000 description 1
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Definitions
- the present invention relates to a polycyclic aromatic compound, an organic electroluminescence device using the same, an organic field effect transistor, an organic thin film solar cell, a display device, and an illumination device.
- the organic EL element has a structure composed of a pair of electrodes composed of an anode and a cathode, and one layer or a plurality of layers including an organic compound disposed between the pair of electrodes.
- the layer containing an organic compound include a light-emitting layer and a charge transport / injection layer that transports or injects charges such as holes and electrons.
- Various organic materials suitable for these layers have been developed.
- a benzofluorene compound has been developed (International Publication No. 2004/061047).
- a hole transport material for example, a triphenylamine compound has been developed (Japanese Patent Laid-Open No. 2001-172232).
- an anthracene compound has been developed (Japanese Patent Laid-Open No. 2005-170911).
- the charge transport property of a NO-linked compound (Compound 1 on page 63) is evaluated, but a method for producing a material other than the NO-linked compound is not described, and the element to be linked is not described. Since the electronic state of the entire compound is different if it is different, the characteristics obtained from materials other than NO-linked compounds are not yet known. Other examples of such compounds can also be found (WO 2011/107186, WO 2015/102118).
- a compound having a conjugated structure with a large triplet exciton energy (T1) can emit phosphorescence having a shorter wavelength, and thus is useful as a blue light-emitting layer material.
- a compound having a novel conjugated structure having a large T1 is also required as an electron transport material or a hole transport material sandwiching the light emitting layer.
- the host material of the organic EL element is generally a molecule in which a plurality of existing aromatic rings such as benzene and carbazole are connected by a single bond, phosphorus atom or silicon atom. This is because a large HOMO-LUMO gap (band gap Eg in a thin film) required for the host material is secured by connecting a large number of relatively conjugated aromatic rings. Furthermore, a host material of an organic EL device using a phosphorescent material or a thermally activated delayed fluorescent material also requires high triplet excitation energy (E T ), but the molecule has a donor or acceptor aromatic ring or substituent.
- E T triplet excitation energy
- the present inventors have found a novel polycyclic aromatic compound in which a plurality of aromatic rings are linked by a boron atom and an oxygen atom, and succeeded in the production thereof. Further, the present inventors have found that an excellent organic EL element can be obtained by arranging an organic EL element by arranging the layer containing the polycyclic aromatic compound between a pair of electrodes, thereby completing the present invention. That is, this invention provides the organic EL element material containing the following polycyclic aromatic compounds and also the following polycyclic aromatic compounds.
- Each Ar is independently aryl or heteroaryl;
- R 1 to R 6 are each independently hydrogen, aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl, or aryloxy, and at least one of them Hydrogen may be substituted with aryl, heteroaryl, diarylamino or alkyl;
- R 4 is a plurality, at least one hydrogen of the aryl in may form an aryl or heteroaryl ring with a ring by bonding adjacent R 4 together, it is formed, heteroaryl, diarylamino , Diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl or aryloxy, wherein at least one hydrogen is substituted with aryl,
- Each Ar is independently aryl;
- R 1 to R 4 are each independently hydrogen, aryl, heteroaryl, alkyl, alkoxy, trialkylsilyl or aryloxy, in which at least one hydrogen is substituted with aryl, heteroaryl or alkyl Well, When R 4 is a plurality, at least one hydrogen in may form an aryl or heteroaryl ring with a ring by bonding adjacent R 4 together, the ring formed is aryl, heteroaryl, alkyl, Optionally substituted with alkoxy, trialkylsilyl or aryloxy, wherein at least one hydrogen may be substituted with aryl, heteroaryl or alkyl;
- m is an integer of 0 to 3
- n is independently an integer from 0 to the maximum possible number of substitution by Ar
- p is an integer of 0 to 4
- q is 0, and r is 0
- X 1 and X 2 are each independently O or N—R, wherein R in N—R is
- R 1 to R 4 are each independently hydrogen, aryl, heteroaryl, alkyl, alkoxy, trialkylsilyl or aryloxy, in which at least one hydrogen is substituted with aryl, heteroaryl or alkyl Well,
- R 4 is a plurality, at least one hydrogen in may form an aryl or heteroaryl ring with a ring by bonding adjacent R 4 together, the ring formed is aryl, heteroaryl, alkyl, Optionally substituted with alkoxy, trialkylsilyl or aryloxy, wherein at least one hydrogen may be substituted with aryl, heteroaryl or alkyl;
- m is an integer from 0 to 3
- n is each independently an integer from 0 to the maximum possible number of substitution with Ar
- p is an integer from 0 to 4,
- each R 1 is independently hydrogen, aryl having 6 to 30 carbon atoms or alkyl having 1 to 24 carbon atoms;
- R 2 and R 3 are each independently hydrogen, aryl having 6 to 30 carbon atoms, heteroaryl having 2 to 30 carbon atoms, alkyl having 1 to 24 carbon atoms, alkoxy having 1 to 24 carbon atoms, carbon number 1
- a trialkylsilyl having 4 to 4 alkyl or aryloxy having 6 to 30 carbon atoms, wherein at least one hydrogen is aryl having 6 to 16 carbon atoms, heteroaryl having 2 to 25 carbon atoms, or 1 to 18 carbon atoms May be substituted with an alkyl of m is an integer from 0 to 3, n is each independently an integer from 0 to 6,
- X 1 and X 2 are each independently O or N—R, wherein R in the N—R is ary
- Each R 1 is independently hydrogen, aryl having 6 to 12 carbon atoms or alkyl having 1 to 12 carbon atoms; R 2 and R 3 each independently represent hydrogen, aryl having 6 to 30 carbon atoms, heteroaryl having 2 to 30 carbon atoms, alkyl having 1 to 24 carbon atoms or alkyl having 1 to 4 carbon atoms.
- Cyril, m is 0 or 1
- n is independently 0 or 1
- X 1 and X 2 are each independently O or N—R, wherein R in the N—R is aryl having 6 to 10 carbon atoms, heteroaryl having 2 to 10 carbon atoms, or 1 to 4 carbon atoms Is alkyl, The polycyclic aromatic compound described in the above [4].
- Each R 1 is independently hydrogen, aryl having 6 to 12 carbon atoms or alkyl having 1 to 12 carbon atoms; R 2 to R 4 each independently represent hydrogen, aryl having 6 to 30 carbon atoms, heteroaryl having 2 to 30 carbon atoms, alkyl having 1 to 24 carbon atoms or alkyl having 1 to 4 carbon atoms Cyril, m is 0 or 1, n is each independently 0 or 1, p is 0 or 1, X 1 and X 2 are each independently O or N—R, wherein R in the N—R is aryl having 6 to 10 carbon atoms, heteroaryl having 2 to 10 carbon atoms, or 1 to 4 carbon atoms Is alkyl, The polycyclic aromatic compound described in [7] above.
- organic device material according to [10], wherein the organic device material is an organic electroluminescent element material, an organic field effect transistor material, or an organic thin film solar cell material.
- An organic electroluminescence device comprising a pair of electrodes composed of an anode and a cathode, and a light-emitting layer disposed between the pair of electrodes and containing the light-emitting layer material described in [12] above.
- a pair of electrodes composed of an anode and a cathode; a light emitting layer disposed between the pair of electrodes; and a material for an electron injection layer described in [13] above, disposed between the cathode and the light emitting layer, and / or An organic electroluminescence device having an electron injection layer and / or an electron transport layer containing an electron transport layer material.
- a pair of electrodes composed of an anode and a cathode; a light emitting layer disposed between the pair of electrodes; a material for a hole injection layer described in [14] above, disposed between the anode and the light emitting layer, and / or Or an organic electroluminescent element which has a positive hole injection layer and / or a positive hole transport layer containing the material for positive hole transport layers.
- the organic electroluminescence device according to any one of [15] to [17] above, which contains at least one selected from the group consisting of a phenanthroline derivative, a borane derivative, and a benzimidazole derivative.
- the electron transport layer and / or the electron injection layer further includes an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal oxide, an alkali metal halide, an alkaline earth metal oxide, or an alkaline earth metal. Containing at least one selected from the group consisting of halides, rare earth metal oxides, rare earth metal halides, alkali metal organic complexes, alkaline earth metal organic complexes and rare earth metal organic complexes, 18].
- a display device comprising the organic electroluminescent element as described in any one of [15] to [19].
- a lighting device comprising the organic electroluminescent element according to any one of [15] to [19].
- a novel polycyclic aromatic compound that can be used as a material for an organic EL element for example, can be provided, and an excellent organic EL element can be obtained by using this polycyclic aromatic compound. Can be provided.
- a polycyclic aromatic compound in which aromatic rings are connected with heteroelements such as boron, oxygen, and nitrogen has a large HOMO-LUMO gap (band gap Eg in a thin film) and a high triplet. It was found to have an excitation energy (E T ). This is because a 6-membered ring containing a hetero element has low aromaticity, so that the reduction of the HOMO-LUMO gap accompanying expansion of the conjugated system is suppressed, and the triplet excited state (T1) is caused by electronic perturbation of the hetero element. ) SOMO1 and SOMO2 are considered to be localized.
- the polycyclic aromatic compound containing a hetero element according to the present invention has triplet excitation because the exchange interaction between both orbitals becomes small due to localization of SOMO1 and SOMO2 in the triplet excited state (T1). Since the energy difference between the state (T1) and the singlet excited state (S1) is small and shows thermally activated delayed fluorescence, it is also useful as a fluorescent material for organic EL elements.
- a material having a high triplet excitation energy (E T ) is also useful as an electron transport layer or a hole transport layer of a phosphorescent organic EL device or an organic EL device using thermally activated delayed fluorescence.
- these polycyclic aromatic compounds can arbitrarily move the energy of HOMO and LUMO by introducing substituents, so that the ionization potential and electron affinity can be optimized according to the surrounding materials. .
- Polycyclic aromatic compound The present invention is a polycyclic aromatic compound represented by the following general formula (1A) or general formula (1B). Further, the present invention is preferably a polycyclic aromatic compound represented by the following general formula (1A ′) or general formula (1B ′).
- Ar is limited to a phenyl group, and R 1 to R 6 substituents and the numbers m, n, p, q, and r are appropriately limited. (1A ′) or general formula (1B ′).
- Ar is each independently aryl or heteroaryl.
- aryl examples include aryl having 6 to 30 carbon atoms, preferably aryl having 6 to 16 carbon atoms, more preferably aryl having 6 to 12 carbon atoms, and particularly preferably aryl having 6 to 10 carbon atoms.
- aryls include: monocyclic phenyl, bicyclic biphenylyl, condensed bicyclic naphthyl, tricyclic terphenylyl (m-terphenylyl, o-terphenylyl, p-terphenylyl), condensed Examples include tricyclic acenaphthylenyl, fluorenyl, phenalenyl, phenanthrenyl, fused tetracyclic triphenylenyl, pyrenyl, naphthacenyl, fused pentacyclic perylenyl, pentacenyl, and the like.
- heteroaryl examples include heteroaryl having 2 to 30 carbon atoms, preferably heteroaryl having 2 to 25 carbon atoms, more preferably heteroaryl having 2 to 20 carbon atoms, and heteroaryl having 2 to 15 carbon atoms. Is more preferable, and heteroaryl having 2 to 10 carbon atoms is particularly preferable.
- heteroaryl examples include heterocycles containing 1 to 5 heteroatoms selected from oxygen, sulfur and nitrogen in addition to carbon as ring-constituting atoms.
- heteroaryl includes, for example, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, oxadiazolyl, thiadiazolyl, triazolyl, tetrazolyl, pyrazolyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, indolyl, isoindolyl, 1H-indazolyl, Benzimidazolyl, benzoxazolyl, benzothiazolyl, 1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, quinoxalinyl, phthalazinyl, naphthyridinyl, purinyl, pteridinyl, carbazolyl, acridinyl, phenoxathinyl,
- R 1 to R 6 are each independently hydrogen, aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl, or aryloxy, and at least one of them Hydrogen may be substituted with aryl, heteroaryl, diarylamino or alkyl.
- Diarylamino, diheteroarylamino and arylheteroarylamino as R 1 to R 6 are groups in which two amino groups, two heteroaryl groups, one aryl group and one heteroaryl group are substituted on the amino group, respectively. And aryl and heteroaryl here can also refer to the explanation of Ar above.
- the alkyl as R 1 to R 6 may be linear or branched, and examples thereof include linear alkyl having 1 to 24 carbon atoms and branched alkyl having 3 to 24 carbon atoms.
- Alkyl having 1 to 18 carbons (branched alkyl having 3 to 18 carbons) is preferable, alkyl having 1 to 12 carbons (branched alkyl having 3 to 12 carbons) is more preferable, and alkyl having 1 to 6 carbons. (Branched alkyl having 3 to 6 carbon atoms) is more preferable, and alkyl having 1 to 4 carbon atoms (branched alkyl having 3 to 4 carbon atoms) is particularly preferable.
- alkyl examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, neopentyl, t-pentyl, n-hexyl, and 1-methyl.
- Pentyl 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1-methylhexyl, n-octyl, t-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propyl Pentyl, n-nonyl, 2,2-dimethylheptyl, 2,6-dimethyl-4-heptyl, 3,5,5-trimethylhexyl, n-decyl, n-undecyl, 1-methyldecyl, n-dodecyl, n- Tridecyl, 1-hexylheptyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-hepta Sill, n- octadecyl, such as n- eicosyl, and the like
- alkoxy as R 1 to R 6 examples include straight-chain alkoxy having 1 to 24 carbon atoms or branched alkoxy having 3 to 24 carbon atoms.
- C1-C18 alkoxy (C3-C18 branched alkoxy) is preferred, C1-C12 alkoxy (C3-C12 branched alkoxy) is more preferred, and C1-C6 Of alkoxy (C3-C6 branched chain alkoxy) is more preferable, and C1-C4 alkoxy (C3-C4 branched chain alkoxy) is particularly preferable.
- alkoxy examples include methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, s-butoxy, t-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxy and the like.
- Examples of the trialkylsilyl as R 1 to R 6 include those in which three hydrogens in the silyl group are each independently substituted with alkyl, and the alkyl is described in the column of alkyl as R 1 to R 6. Can be given.
- Preferable alkyl for substitution is alkyl having 1 to 4 carbon atoms, and specific examples include methyl, ethyl, propyl, i-propyl, butyl, sec-butyl, t-butyl, cyclobutyl and the like.
- trialkylsilyl include trimethylsilyl, triethylsilyl, tripropylsilyl, trii-propylsilyl, tributylsilyl, trisec-butylsilyl, trit-butylsilyl, ethyldimethylsilyl, propyldimethylsilyl, i-propyldimethylsilyl , Butyldimethylsilyl, sec-butyldimethylsilyl, t-butyldimethylsilyl, methyldiethylsilyl, propyldiethylsilyl, i-propyldiethylsilyl, butyldiethylsilyl, sec-butyldiethylsilyl, t-butyldiethylsilyl, methyldipropyl Silyl, ethyldipropylsilyl, butyldipropylsilyl, sec-buty
- Aryloxy as R 1 to R 6 is a group in which a hydrogen atom of a hydroxyl group is substituted with aryl, and the aryl here can refer to the explanation of Ar above.
- At least one hydrogen in R 1 to R 6 may be substituted with aryl, heteroaryl, diarylamino or alkyl, and the above description can be cited for these substituents.
- R 4 in General Formula (1B) and General Formula (1B ′) is plural, adjacent R 4 may be bonded to each other to form an aryl ring or a heteroaryl ring together with a ring.
- At least one hydrogen in the ring may be substituted with aryl, heteroaryl, diarylamino, diheteroarylamino, arylheteroarylamino, alkyl, alkoxy, trialkylsilyl or aryloxy, wherein at least one hydrogen is It may be substituted with aryl, heteroaryl, diarylamino or alkyl.
- the case where the substituent R 4 is adjacent means a case where two substituents R 4 are substituted on adjacent carbons on the a ring (benzene ring).
- the polycyclic aromatic compound represented by the general formula (1B) or the general formula (1B ′) has the following general formula (1B-a ′) and general formula ( 1B′-a ′), the ring structure constituting the compound changes (the a ring changes to the a ′ ring).
- the compounds represented by the general formula (1B-a ′) and the general formula (1B′-a ′) are listed as specific compounds described later, for example, the formula (1B-2), the formula (1B-4), It corresponds to a compound represented by formula (1B-12), formula (1B-18), formula (1B-20) or formula (1B-24). That is, it is a compound having an a ′ ring formed by condensation of a benzene ring with a benzene ring which is a ring, and the condensed ring a ′ formed is a naphthalene ring.
- a carbazole ring formed by condensation of an indole ring, a pyrrole ring, a benzofuran ring, or a benzothiophene ring with a benzene ring that is a ring (the hydrogen on N is substituted with the above alkyl or aryl).
- an indole ring including those in which the hydrogen on N is substituted with the above alkyl or aryl
- a dibenzofuran ring or a dibenzothiophene ring is included indole ring.
- R 3 and R 6 in the general formulas (1A) and (1B) are adjacent to each other, they may be bonded by —O—, —S—, —C (—R) 2 —, or a single bond R of —C (—R) 2 — is hydrogen or alkyl having 1 to 6 carbons (particularly alkyl having 1 to 4 carbons (eg, methyl, ethyl, etc.)).
- R 3 and R 6 are adjacent to each other, for example, as described below, the substituent R 3 is substituted next to the bonding position with N (nitrogen) in Ar (phenyl), and N (nitrogen) in the fluorene structure Means that the substituent R 3 is substituted next to the bonding position.
- the two substituents may be combined as described above.
- n is an integer of 0 to 3
- n is each independently an integer from 0 to the maximum number that can be substituted with Ar
- p is an integer of 0 to 4
- q is independently 0 to 2
- r is independently an integer of 0 to 3.
- M is preferably an integer of 0 to 2, more preferably 0 or 1, and particularly preferably 0.
- Each n is independently preferably an integer of 0 to 5, more preferably an integer of 0 to 3, particularly preferably an integer of 0 to 2, further preferably 0 or 1.
- Most preferably 0. p is preferably an integer of 0 to 2, more preferably 0 or 1, and particularly preferably 0.
- q is each independently preferably 0 or 1, particularly preferably 0.
- Each r is independently preferably 0 or 1, particularly preferably 0.
- X 1 and X 2 are each independently O or N—R, wherein R in N—R is aryl having 6 to 12 carbons, heteroaryl having 2 to 15 carbons, or 1 to 6 carbons Alkyl.
- R in the general formulas (1B) and (1B ′) is N—R
- R is —O—, —S—, —C (—R) 2 —, or a single bond to the ring a.
- R in —C (—R) 2 — may be bonded to hydrogen or alkyl having 1 to 6 carbons (particularly alkyl having 1 to 4 carbons (eg, methyl, ethyl, etc.)).
- R 1 to R 6 can be cited for the alkyl as —R in —C (—R) 2 —.
- R in N—R is bonded to the a ring by —O—, —S—, —C (—R) 2 — or a single bond” is defined by the following general formula (1B-a Or a compound having a ring structure in which X 2 is incorporated into a condensed ring a ′′, represented by general formula (1B′-a ′′).
- the condensed ring a ′′ thus formed is, for example, a phenoxazine ring, a phenothiazine ring or an acridine ring.
- At least one hydrogen in the compound represented by the general formula (1A) or the general formula (1B) may be substituted with halogen or deuterium.
- Halogen is fluorine, chlorine, bromine or iodine, preferably fluorine, chlorine or bromine, more preferably chlorine.
- the polycyclic aromatic compound according to the present invention can be used as a material for organic devices.
- an organic device an organic electroluminescent element, an organic field effect transistor, an organic thin film solar cell, etc. are mention
- a compound in which X 1 is NR and X 2 is O is preferable, and a compound in which X 1 is O and X 2 is NR as a host material of the light emitting layer, X 1 is NR , A compound in which X 2 is O, and a compound in which X 1 and X 2 are O are preferable, and a compound in which X 1 and X 2 are O is preferably used as an electron transport material.
- polycyclic aromatic compound of the present invention include, for example, compounds represented by the following formulas (1A-1) to (1A-28), and the following formulas (1B-1) to (1B-26). And compounds represented by the following formulas (1B-27) to (1B-42).
- the polycyclic aromatic compound represented by the general formula (1B) or the general formula (1B ′) of the present invention is a phenyloxy group, a carbazolyl group or a diphenylamino group at the para position with respect to B (boron) in the a ring.
- an improvement in T1 energy an improvement of about 0.01 to 0.1 eV
- HOMO on the benzene ring, which is a ring is more localized at the meta position relative to boron
- LUMO is localized at the ortho and para positions relative to boron. Therefore, the T1 energy can be particularly improved.
- At least one hydrogen in one or a plurality of phenyl groups or one phenylene group in the compound has one or more carbon atoms.
- the polycyclic aromatic compound represented by the general formula (1A) or (1B) is basically composed of two fluorene compounds in the general formula (1A).
- an intermediate is produced by bonding one fluorene compound and a ring with a linking group (a group containing X 1 and X 2 ) (first reaction), and then the general formula
- first reaction two fluorene compounds are bonded to each other
- second reaction one fluorene compound and the a ring are bonded to each other through a bonding group (B: a group containing a boron atom).
- a general reaction such as a nucleophilic substitution reaction and an Ullmann reaction can be used for an etherification reaction, and a general reaction such as a Buchwald-Hartwig reaction can be used for an amination reaction.
- a tandem hetero Friedel-Crafts reaction continuous aromatic electrophilic substitution reaction, the same applies hereinafter
- the second reaction is a reaction for introducing B (boron atom) that binds two fluorene compounds or one fluorene compound and a ring
- B boron atom
- X 1 and X 2 are oxygen atoms
- a hydrogen atom and n- butyllithium between X 1 and X 2 ortho-metalated with sec- butyllithium or t- butyl lithium, and the like.
- Bronsted base such as N, N-diisopropylethylamine is added to cause tandem Bora Friedel-Crafts reaction. You can get things.
- a Lewis acid such as aluminum trichloride may be added to accelerate the reaction.
- lithium is introduced into a desired position by orthometalation.
- a bromine atom or the like is introduced at a position where lithium is to be introduced, and halogen-metal exchange is also performed.
- Lithium can be introduced at the desired location.
- This method is useful because the target product can be synthesized even in the case where ortho-metalation is not possible due to the influence of substituents.
- a polycyclic aromatic compound having a substituent at a desired position and X 1 and X 2 being oxygen atoms can be synthesized by appropriately selecting the above-described synthesis method and appropriately selecting the raw material to be used. .
- X 1 and X 2 are nitrogen atoms
- the hydrogen atom between X 1 and X 2 is first ortho-metalated with n-butyllithium or the like.
- boron tribromide and the like are added, and after lithium-boron metal exchange is performed, Brensted base such as N, N-diisopropylethylamine is added to cause tandem Bora Friedel-Crafts reaction to obtain the target product.
- a Lewis acid such as aluminum trichloride may be added to promote the reaction.
- solvent used in the above reaction are toluene, t-butylbenzene, xylene and the like.
- R 4 is plural in formula (1B) and the general formula (1B '), may form an aryl or heteroaryl ring with a ring by bonding adjacent R 4 together. Therefore, the polycyclic aromatic compounds represented by the general formula (1B) and the general formula (1B ′) are represented by the general formulas of the following schemes (7) and (8) depending on the mutual bonding form of the substituents in the a ring ( As shown in 1B-a ′) and general formula (1B′-a ′), the ring structure constituting the compound changes. These compounds can be synthesized by applying the synthesis methods shown in the above schemes (1) to (6) to the intermediates shown in the following schemes (7) and (8).
- the a ′ ring in the general formula (1B-a ′) and the general formula (1B′-a ′) represents an aryl ring or a heteroaryl ring formed by bonding adjacent R 4 together with the a ring.
- the orthometalation reagents used in the above schemes (1) to (10) include alkyllithium such as methyllithium, n-butyllithium, sec-butyllithium, t-butyllithium, lithium diisopropylamide, lithium tetramethyl, etc.
- alkyllithium such as methyllithium, n-butyllithium, sec-butyllithium, t-butyllithium, lithium diisopropylamide, lithium tetramethyl, etc.
- Examples include organic alkali compounds such as piperidide, lithium hexamethyldisilazide, and potassium hexamethyldisilazide.
- the metal-B (boron) metal exchange reagent used in the above schemes (1) to (10) includes B halides such as B trifluoride, trichloride, tribromide, and triiodide, Examples thereof include an aminated halide of B such as CIPN (NEt 2 ) 2 , an alkoxylated product of B, and an aryloxylated product of B.
- B halides such as B trifluoride, trichloride, tribromide, and triiodide
- B halides such as B trifluoride, trichloride, tribromide, and triiodide
- Examples thereof include an aminated halide of B such as CIPN (NEt 2 ) 2 , an alkoxylated product of B, and an aryloxylated product of B.
- the Bronsted base used in the above schemes (1) to (10) includes N, N-diisopropylethylamine, triethylamine, 2,2,6,6-tetramethylpiperidine, 1,2,2,6,6. -Pentamethylpiperidine, N, N-dimethylaniline, N, N-dimethyltoluidine, 2,6-lutidine, sodium tetraphenylborate, potassium tetraphenylborate, triphenylborane, tetraphenylsilane, Ar 4 BNa, Ar 4 BK, Ar 3 B, Ar 4 Si (where Ar is an aryl such as phenyl) and the like.
- a Bronsted base or a Lewis acid may be used to promote the tandem heterofriedel crafts reaction.
- B halides such as B trifluoride, trichloride, tribromide, triiodide
- hydrogen fluoride, hydrogen chloride, hydrogen bromide with the progress of the aromatic electrophilic substitution reaction
- an acid such as hydrogen iodide is generated, it is effective to use a Bronsted base that captures the acid.
- an aminated halide of B or an alkoxylated product of B is used, an amine or alcohol is produced with the progress of the aromatic electrophilic substitution reaction.
- the use of a Lewis acid that promotes the elimination is effective.
- the polycyclic aromatic compound of the present invention includes those in which at least a part of hydrogen atoms are substituted with deuterium and those substituted with halogen such as fluorine or chlorine. Can be synthesized in the same manner as described above by using a raw material in which a desired portion is deuterated, fluorinated or chlorinated.
- the polycyclic aromatic compound according to the present invention can be used as a material for organic devices.
- an organic device an organic electroluminescent element, an organic field effect transistor, an organic thin film solar cell, etc. are mention
- FIG. 1 is a schematic cross-sectional view showing an organic EL element according to this embodiment.
- An organic electroluminescent device 100 shown in FIG. 1 includes a substrate 101, an anode 102 provided on the substrate 101, a hole injection layer 103 provided on the anode 102, and a hole injection layer 103.
- the cathode 108 provided on the electron injection layer 107.
- the organic electroluminescent element 100 is manufactured in the reverse order, for example, the substrate 101, the cathode 108 provided on the substrate 101, the electron injection layer 107 provided on the cathode 108, and the electron injection layer.
- a structure including the hole injection layer 103 provided above and the anode 102 provided on the hole injection layer 103 may be employed.
- each said layer may consist of a single layer, respectively, and may consist of multiple layers.
- the substrate 101 serves as a support for the organic electroluminescent device 100, and usually quartz, glass, metal, plastic, or the like is used.
- the substrate 101 is formed into a plate shape, a film shape, or a sheet shape according to the purpose.
- a glass plate, a metal plate, a metal foil, a plastic film, a plastic sheet, or the like is used.
- glass plates and transparent synthetic resin plates such as polyester, polymethacrylate, polycarbonate, polysulfone and the like are preferable.
- soda lime glass, non-alkali glass, or the like is used, and the thickness only needs to be sufficient to maintain the mechanical strength.
- the upper limit value of the thickness is, for example, 2 mm or less, preferably 1 mm or less.
- the glass material is preferably alkali-free glass because it is better to have less ions eluted from the glass.
- soda lime glass with a barrier coat such as SiO 2 is also commercially available, so it can be used. it can.
- the substrate 101 may be provided with a gas barrier film such as a dense silicon oxide film on at least one surface in order to improve the gas barrier property, and a synthetic resin plate, film or sheet having a low gas barrier property is used as the substrate 101. When used, it is preferable to provide a gas barrier film.
- the anode 102 serves to inject holes into the light emitting layer 105.
- the hole injection layer 103 and / or the hole transport layer 104 are provided between the anode 102 and the light emitting layer 105, holes are injected into the light emitting layer 105 through these layers. .
- Examples of the material for forming the anode 102 include inorganic compounds and organic compounds.
- Examples of inorganic compounds include metals (aluminum, gold, silver, nickel, palladium, chromium, etc.), metal oxides (indium oxide, tin oxide, indium-tin oxide (ITO), indium-zinc oxide) Products (IZO), metal halides (copper iodide, etc.), copper sulfide, carbon black, ITO glass, Nesa glass, and the like.
- Examples of the organic compound include polythiophene such as poly (3-methylthiophene), conductive polymer such as polypyrrole and polyaniline, and the like. In addition, it can select suitably from the substances currently used as an anode of an organic electroluminescent element, and can use it.
- the resistance of the transparent electrode is not limited as long as it can supply a sufficient current for light emission of the light emitting element, but is preferably low resistance from the viewpoint of power consumption of the light emitting element.
- an ITO substrate of 300 ⁇ / ⁇ or less functions as an element electrode, but at present, since it is possible to supply a substrate of about 10 ⁇ / ⁇ , for example, 100 to 5 ⁇ / ⁇ , preferably 50 to 5 ⁇ . It is particularly desirable to use a low resistance product of / ⁇ .
- the thickness of ITO can be arbitrarily selected according to the resistance value, but is usually used in a range of 50 to 300 nm.
- the hole injection layer 103 plays a role of efficiently injecting holes moving from the anode 102 into the light emitting layer 105 or the hole transport layer 104.
- the hole transport layer 104 plays a role of efficiently transporting holes injected from the anode 102 or holes injected from the anode 102 through the hole injection layer 103 to the light emitting layer 105.
- the hole injection layer 103 and the hole transport layer 104 are each formed by laminating and mixing one kind or two or more kinds of hole injection / transport materials or a mixture of the hole injection / transport material and the polymer binder. Is done.
- an inorganic salt such as iron (III) chloride may be added to the hole injection / transport material to form a layer.
- a hole injection / transport material As a hole injection / transport material, it is necessary to efficiently inject and transport holes from the positive electrode between electrodes to which an electric field is applied. The hole injection efficiency is high, and the injected holes are transported efficiently. It is desirable to do. For this purpose, it is preferable to use a substance that has a low ionization potential, a high hole mobility, excellent stability, and is less likely to generate trapping impurities during production and use.
- a polycyclic aromatic compound represented by the general formula (1A) or the general formula (1B) can be used as a material for forming the hole injection layer 103 and the hole transport layer 104.
- a polycyclic aromatic compound represented by the general formula (1A) or the general formula (1B) can be used as a material for forming the hole injection layer 103 and the hole transport layer 104.
- photoconductive materials compounds conventionally used as hole charge transport materials, p-type semiconductors, and known materials used in hole injection layers and hole transport layers of organic electroluminescence devices Any one can be selected and used.
- carbazole derivatives N-phenylcarbazole, polyvinylcarbazole, etc.
- biscarbazole derivatives such as bis (N-arylcarbazole) or bis (N-alkylcarbazole)
- triarylamine derivatives aromatic tertiary class
- polycarbonates, styrene derivatives, polyvinylcarbazole, polysilanes, etc. having the aforementioned monomers in the side chain are preferred, but light emitting devices There is no particular limitation as long as it is a compound capable of forming a thin film necessary for the fabrication of the material, injecting holes from the anode, and further transporting holes.
- organic semiconductors are strongly influenced by the doping.
- Such an organic semiconductor matrix material is composed of a compound having a good electron donating property or a compound having a good electron accepting property.
- Strong electron acceptors such as tetracyanoquinone dimethane (TCNQ) or 2,3,5,6-tetrafluorotetracyano-1,4-benzoquinone dimethane (F4TCNQ) are known for doping of electron donor materials.
- TCNQ tetracyanoquinone dimethane
- F4TCNQ 2,3,5,6-tetrafluorotetracyano-1,4-benzoquinone dimethane
- the light emitting layer 105 emits light by recombining holes injected from the anode 102 and electrons injected from the cathode 108 between electrodes to which an electric field is applied.
- the material for forming the light-emitting layer 105 may be a compound that emits light by being excited by recombination of holes and electrons (a light-emitting compound), can form a stable thin film shape, and is in a solid state It is preferable that the compound exhibits a strong light emission (fluorescence) efficiency.
- the polycyclic aromatic compound represented by the general formula (1A) or the general formula (1B) can be used as the material for the light emitting layer.
- the light emitting layer may be either a single layer or a plurality of layers, each formed of a light emitting layer material (host material, dopant material).
- a light emitting layer material host material, dopant material
- Each of the host material and the dopant material may be one kind or a plurality of combinations.
- the dopant material may be included in the host material as a whole, or may be included partially.
- As a doping method it can be formed by a co-evaporation method with a host material, but it may be pre-mixed with the host material and then simultaneously deposited.
- the amount of host material used depends on the type of host material and can be determined according to the characteristics of the host material.
- the standard of the amount of the host material used is preferably 50 to 99.999% by weight of the entire light emitting layer material, more preferably 80 to 99.95% by weight, and still more preferably 90 to 99.9% by weight. It is.
- the polycyclic aromatic compound represented by the general formula (1A) or the general formula (1B) can also be used as a host material.
- the amount of dopant material used depends on the type of dopant material, and can be determined according to the characteristics of the dopant material.
- the standard of the amount of dopant used is preferably 0.001 to 50% by weight, more preferably 0.05 to 20% by weight, and further preferably 0.1 to 10% by weight of the entire material for the light emitting layer. is there. The above range is preferable in that, for example, the concentration quenching phenomenon can be prevented.
- the polycyclic aromatic compound represented by the general formula (1A) or the general formula (1B) can also be used as a dopant material.
- condensed ring derivatives such as anthracene and pyrene, which have been known as light emitters
- examples thereof include bisstyryl derivatives such as bisstyryl anthracene derivatives and distyrylbenzene derivatives, tetraphenylbutadiene derivatives, cyclopentadiene derivatives, fluorene derivatives, and benzofluorene derivatives.
- a known compound can be used.
- various materials can be selected. Specifically, for example, condensed ring derivatives such as phenanthrene, anthracene, pyrene, tetracene, pentacene, perylene, naphthopylene, dibenzopyrene, rubrene and chrysene, benzoxazole derivatives, benzothiazole derivatives, benzimidazole derivatives, benzotriazole derivatives, oxazoles Derivatives, oxadiazole derivatives, thiazole derivatives, imidazole derivatives, thiadiazole derivatives, triazole derivatives, pyrazoline derivatives, stilbene derivatives, thiophene derivatives, tetraphenylbutadiene derivatives, cyclopent
- condensed ring derivatives such as phenanthrene, anthracene, pyrene, tetracene, pentacene, perylene, naph
- blue to blue-green dopant materials include naphthalene, anthracene, phenanthrene, pyrene, triphenylene, perylene, fluorene, indene, chrysene and other aromatic hydrocarbon compounds and derivatives thereof, furan, pyrrole, thiophene, Aromatic complex such as silole, 9-silafluorene, 9,9'-spirobisilafluorene, benzothiophene, benzofuran, indole, dibenzothiophene, dibenzofuran, imidazopyridine, phenanthroline, pyrazine, naphthyridine, quinoxaline, pyrrolopyridine, thioxanthene Ring compounds and their derivatives, distyrylbenzene derivatives, tetraphenylbutadiene derivatives, stilbene derivatives, aldazine derivatives, coumarin derivatives, imidazo
- green to yellow dopant material examples include coumarin derivatives, phthalimide derivatives, naphthalimide derivatives, perinone derivatives, pyrrolopyrrole derivatives, cyclopentadiene derivatives, acridone derivatives, quinacridone derivatives, and naphthacene derivatives such as rubrene.
- a compound in which a substituent capable of increasing the wavelength such as aryl, heteroaryl, arylvinyl, amino, cyano is introduced into the compound exemplified as a blue-green dopant material is also a suitable example.
- orange to red dopant materials include naphthalimide derivatives such as bis (diisopropylphenyl) perylenetetracarboxylic imide, perinone derivatives, rare earth complexes such as Eu complexes having acetylacetone, benzoylacetone and phenanthroline as ligands, 4 -(Dicyanomethylene) -2-methyl-6- (p-dimethylaminostyryl) -4H-pyran and its analogs, metal phthalocyanine derivatives such as magnesium phthalocyanine and aluminum chlorophthalocyanine, rhodamine compounds, deazaflavin derivatives, coumarin derivatives, quinacridone Derivatives, phenoxazine derivatives, oxazine derivatives, quinazoline derivatives, pyrrolopyridine derivatives, squarylium derivatives, violanthrone derivatives, phenazine derivatives, phenoxazo Derivatives, thi
- the dopant can be appropriately selected from the compounds described in Chemical Industry, June 2004, page 13, and references cited therein.
- amines having a stilbene structure perylene derivatives, borane derivatives, aromatic amine derivatives, coumarin derivatives, pyran derivatives or pyrene derivatives are particularly preferable.
- the amine having a stilbene structure is represented by the following formula, for example.
- Ar 1 is an m-valent group derived from aryl having 6 to 30 carbon atoms
- Ar 2 and Ar 3 are each independently aryl having 6 to 30 carbon atoms
- Ar 1 to Ar At least one of 3 has a stilbene structure
- Ar 1 to Ar 3 may be substituted with aryl, heteroaryl, alkyl, trisubstituted silyl (silyl substituted with aryl and / or alkyl) or cyano.
- m is an integer from 1 to 4.
- the amine having a stilbene structure is more preferably a diaminostilbene represented by the following formula.
- Ar 2 and Ar 3 are each independently aryl having 6 to 30 carbon atoms, and Ar 2 and Ar 3 are aryl, heteroaryl, alkyl, tri-substituted silyl (aryl and / or alkyl trivalent). Optionally substituted with silyl) or cyano.
- aryl having 6 to 30 carbon atoms include phenyl, naphthyl, acenaphthylenyl, fluorenyl, phenalenyl, phenanthrenyl, anthryl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, perylenyl, stilbenyl, distyrylphenyl, distyrylbiphenylyl , Distyrylfluorenyl and the like.
- amines having a stilbene structure include N, N, N ′, N′-tetra (4-biphenylyl) -4,4′-diaminostilbene, N, N, N ′, N′-tetra (1-naphthyl) ) -4,4′-diaminostilbene, N, N, N ′, N′-tetra (2-naphthyl) -4,4′-diaminostilbene, N, N′-di (2-naphthyl) -N, N '-Diphenyl-4,4'-diaminostilbene, N, N'-di (9-phenanthryl) -N, N'-diphenyl-4,4'-diaminostilbene, 4,4'-bis [4 "-bis (Diphenylamino) styryl] -biphenyl, 1,4-bis [4′-bis (diphenylamino)
- perylene derivatives examples include 3,10-bis (2,6-dimethylphenyl) perylene, 3,10-bis (2,4,6-trimethylphenyl) perylene, 3,10-diphenylperylene, 3,4- Diphenylperylene, 2,5,8,11-tetra-t-butylperylene, 3,4,9,10-tetraphenylperylene, 3- (1'-pyrenyl) -8,11-di (t-butyl) perylene 3- (9′-anthryl) -8,11-di (t-butyl) perylene, 3,3′-bis (8,11-di (t-butyl) perylenyl), and the like.
- JP-A-11-97178, JP-A-2000-133457, JP-A-2000-26324, JP-A-2001-267079, JP-A-2001-267078, JP-A-2001-267076, Perylene derivatives described in JP-A No. 2000-34234, JP-A No. 2001-267075, JP-A No. 2001-217077 and the like may be used.
- borane derivatives examples include 1,8-diphenyl-10- (dimesitylboryl) anthracene, 9-phenyl-10- (dimesitylboryl) anthracene, 4- (9′-anthryl) dimesitylborylnaphthalene, 4- (10 ′ -Phenyl-9'-anthryl) dimesitylborylnaphthalene, 9- (dimesitylboryl) anthracene, 9- (4'-biphenylyl) -10- (dimesitylboryl) anthracene, 9- (4 '-(N-carbazolyl) phenyl) And -10- (dimesitylboryl) anthracene.
- the aromatic amine derivative is represented by the following formula, for example.
- Ar 4 is an n-valent group derived from aryl having 6 to 30 carbon atoms
- Ar 5 and Ar 6 are each independently aryl having 6 to 30 carbon atoms
- Ar 4 to Ar 6 are , Aryl, heteroaryl, alkyl, trisubstituted silyl (silyl substituted with aryl and / or alkyl) or cyano
- n is an integer from 1 to 4.
- Ar 4 is a divalent group derived from anthracene, chrysene, fluorene, benzofluorene or pyrene
- Ar 5 and Ar 6 are each independently an aryl having 6 to 30 carbon atoms
- Ar 4 to Ar 6 Is more preferably an aromatic amine derivative, optionally substituted with aryl, heteroaryl, alkyl, trisubstituted silyl (silyl substituted with aryl and / or alkyl) or cyano
- n is 2.
- aryl having 6 to 30 carbon atoms include phenyl, naphthyl, acenaphthylenyl, fluorenyl, phenalenyl, phenanthrenyl, anthryl, fluoranthenyl, triphenylenyl, pyrenyl, chrysenyl, naphthacenyl, perylenyl, pentacenyl and the like.
- the chrysene type includes, for example, N, N, N ′, N′-tetraphenylchrysene-6,12-diamine, N, N, N ′, N′-tetra (p-tolyl) Chrysene-6,12-diamine, N, N, N ′, N′-tetra (m-tolyl) chrysene-6,12-diamine, N, N, N ′, N′-tetrakis (4-isopropylphenyl) chrysene -6,12-diamine, N, N, N ', N'-tetra (naphthalen-2-yl) chrysene-6,12-diamine, N, N'-diphenyl-N, N'-di (p-tolyl) ) Chrysene-6,12-diamine, N, N′-diphenyl-N, N′-bis (4
- Examples of the pyrene series include N, N, N ′, N′-tetraphenylpyrene-1,6-diamine, N, N, N ′, N′-tetra (p-tolyl) pyrene-1,6.
- anthracene system examples include N, N, N, N-tetraphenylanthracene-9,10-diamine, N, N, N ′, N′-tetra (p-tolyl) anthracene-9,10-diamine.
- Examples of coumarin derivatives include coumarin-6 and coumarin-334. Moreover, you may use the coumarin derivative described in Unexamined-Japanese-Patent No. 2004-43646, Unexamined-Japanese-Patent No. 2001-76876, and Unexamined-Japanese-Patent No. 6-298758.
- Examples of the pyran derivative include the following DCM and DCJTB. Also, JP 2005-126399, JP 2005-097283, JP 2002-234892, JP 2001-220577, JP 2001-081090, and JP 2001-052869. Alternatively, pyran derivatives described in the above may be used.
- the electron injection layer 107 plays a role of efficiently injecting electrons moving from the cathode 108 into the light emitting layer 105 or the electron transport layer 106.
- the electron transport layer 106 plays a role of efficiently transporting electrons injected from the cathode 108 or electrons injected from the cathode 108 through the electron injection layer 107 to the light emitting layer 105.
- the electron transport layer 106 and the electron injection layer 107 are each formed by laminating and mixing one or more electron transport / injection materials or a mixture of the electron transport / injection material and the polymer binder.
- the electron injection / transport layer is a layer that is responsible for injecting electrons from the cathode and further transporting the electrons. It is desirable that the electron injection efficiency is high and the injected electrons are transported efficiently. For this purpose, it is preferable to use a substance that has a high electron affinity, a high electron mobility, excellent stability, and is unlikely to generate trapping impurities during production and use. However, considering the transport balance between holes and electrons, if the role of effectively preventing the holes from the anode from flowing to the cathode side without recombination is mainly played, the electron transport capability is much higher. Even if it is not high, the effect of improving the luminous efficiency is equivalent to that of a material having a high electron transport capability. Therefore, the electron injection / transport layer in this embodiment may include a function of a layer that can efficiently block the movement of holes.
- a material (electron transport material) for forming the electron transport layer 106 or the electron injection layer 107 a polycyclic aromatic compound represented by the general formula (1A) or the general formula (1B) can be used.
- it can be arbitrarily selected from compounds conventionally used as electron transport compounds in photoconductive materials and known compounds used in electron injection layers and electron transport layers of organic electroluminescent devices. .
- a compound composed of an aromatic ring or a heteroaromatic ring composed of one or more atoms selected from carbon, hydrogen, oxygen, sulfur, silicon and phosphorus It is preferable to contain at least one selected from pyrrole derivatives, condensed ring derivatives thereof, and metal complexes having electron-accepting nitrogen.
- condensed ring aromatic ring derivatives such as naphthalene and anthracene, styryl aromatic ring derivatives represented by 4,4′-bis (diphenylethenyl) biphenyl, perinone derivatives, coumarin derivatives, naphthalimide derivatives Quinone derivatives such as anthraquinone and diphenoquinone, phosphorus oxide derivatives, carbazole derivatives and indole derivatives.
- metal complexes having electron-accepting nitrogen include hydroxyazole complexes such as hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. These materials can be used alone or in combination with different materials.
- electron transfer compounds include pyridine derivatives, naphthalene derivatives, anthracene derivatives, phenanthroline derivatives, perinone derivatives, coumarin derivatives, naphthalimide derivatives, anthraquinone derivatives, diphenoquinone derivatives, diphenylquinone derivatives, perylene derivatives, oxadiazoles.
- metal complexes having electron-accepting nitrogen can also be used, such as hydroxyazole complexes such as quinolinol-based metal complexes and hydroxyphenyloxazole complexes, azomethine complexes, tropolone metal complexes, flavonol metal complexes, and benzoquinoline metal complexes. can give.
- the above-mentioned materials can be used alone, but they may be mixed with different materials.
- quinolinol metal complexes Among the materials described above, quinolinol metal complexes, bipyridine derivatives, phenanthroline derivatives or borane derivatives are preferred.
- the quinolinol-based metal complex is a compound represented by the following general formula (E-1).
- R 1 to R 6 are each independently hydrogen, fluorine, alkyl, aralkyl, alkenyl, cyano, alkoxy or aryl
- M is Li, Al, Ga, Be or Zn
- n is 1 It is an integer of ⁇ 3.
- quinolinol metal complexes include 8-quinolinol lithium, tris (8-quinolinolato) aluminum, tris (4-methyl-8-quinolinolato) aluminum, tris (5-methyl-8-quinolinolato) aluminum, tris (3 , 4-dimethyl-8-quinolinolato) aluminum, tris (4,5-dimethyl-8-quinolinolato) aluminum, tris (4,6-dimethyl-8-quinolinolato) aluminum, bis (2-methyl-8-quinolinolato) ( Phenolate) aluminum, bis (2-methyl-8-quinolinolato) (2-methylphenolate) aluminum, bis (2-methyl-8-quinolinolato) (3-methylphenolato) aluminum, bis (2-methyl-8- Quinolinolato) (4- Tylphenolate) aluminum, bis (2-methyl-8-quinolinolato) (2-phenylphenolate) aluminum, bis (2-methyl-8-quinolinolato) (3-phenylphenolate)
- the bipyridine derivative is a compound represented by the following general formula (E-2).
- G represents a simple bond or an n-valent linking group, and n is an integer of 2 to 8.
- Carbons not used for the pyridine-pyridine or pyridine-G bond may be substituted with aryl, heteroaryl, alkyl or cyano.
- G in the general formula (E-2) examples include the following structural formulas.
- each R is independently hydrogen, methyl, ethyl, isopropyl, cyclohexyl, phenyl, 1-naphthyl, 2-naphthyl, biphenylyl or terphenylyl.
- pyridine derivative examples include 2,5-bis (2,2′-pyridin-6-yl) -1,1-dimethyl-3,4-diphenylsilole, 2,5-bis (2,2′- Pyridin-6-yl) -1,1-dimethyl-3,4-dimesitylsilole, 2,5-bis (2,2′-pyridin-5-yl) -1,1-dimethyl-3,4 Diphenylsilole, 2,5-bis (2,2′-pyridin-5-yl) -1,1-dimethyl-3,4-dimesitylsilole, 9,10-di (2,2′-pyridine-6) -Yl) anthracene, 9,10-di (2,2′-pyridin-5-yl) anthracene, 9,10-di (2,3′-pyridin-6-yl) anthracene, 9,10-di (2 , 3′-Pyridin-5-yl)
- the phenanthroline derivative is a compound represented by the following general formula (E-3-1) or (E-3-2).
- R 1 to R 8 are each independently hydrogen, alkyl (methyl, ethyl, isopropyl, hydroxyethyl, methoxymethyl, trifluoromethyl, t-butyl, cyclopentyl, cyclohexyl, benzyl, etc.), alkyloxy ( Methoxy, ethoxy, isopropoxy, butoxy, etc.), aryloxy (phenoxy, 1-naphthyloxy, 4-tolyloxy, etc.), halogen (fluorine, chlorine, bromine, iodine, etc.), aryl (phenyl, naphthyl, p-tolyl, p) -Chlorophenyl, etc.), alkylthio (methylthio, ethylthio, isopropylthio, etc.), arylthio (phenyl
- phenanthroline derivatives include 4,7-diphenyl-1,10-phenanthroline, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, 9,10-di (1,10-phenanthroline- 2-yl) anthracene, 2,6-di (1,10-phenanthroline-5-yl) pyridine, 1,3,5-tri (1,10-phenanthroline-5-yl) benzene, 9,9′-difluoro -Bi (1,10-phenanthroline-5-yl), bathocuproin, 1,3-bis (2-phenyl-1,10-phenanthroline-9-yl) benzene and the like.
- a phenanthroline derivative is used for the electron transport layer and the electron injection layer.
- the substituent itself has a three-dimensional structure, or a phenanthroline skeleton or Those having a three-dimensional structure by steric repulsion with adjacent substituents, or those obtained by linking a plurality of phenanthroline skeletons are preferred.
- a compound containing a conjugated bond, a substituted or unsubstituted aromatic hydrocarbon, or a substituted or unsubstituted aromatic heterocycle in the linking unit is more preferable.
- the borane derivative is a compound represented by the following general formula (E-4), and is disclosed in detail in JP-A-2007-27587.
- each of R 11 and R 12 independently represents at least one of hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle, or cyano.
- R 13 to R 16 are each independently an optionally substituted alkyl or an optionally substituted aryl
- X is an optionally substituted arylene
- Y is Optionally substituted aryl having 16 or less carbon atoms, substituted boryl, or optionally substituted carbazolyl
- n is each independently an integer of 0 to 3.
- substituent in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- each of R 11 and R 12 independently represents at least one of hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle, or cyano.
- R 13 to R 16 are each independently an optionally substituted alkyl or an optionally substituted aryl
- R 21 and R 22 are each independently hydrogen, alkyl, At least one of optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocyclic ring, or cyano
- X 1 is optionally substituted arylene having 20 or less carbon atoms.
- N is each independently an integer from 0 to 3
- m is each independently an integer from 0 to 4.
- substituent in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- R 31 to R 34 are each independently methyl, isopropyl or phenyl
- R 35 and R 36 are each independently hydrogen, methyl, isopropyl or phenyl. It is.
- each of R 11 and R 12 independently represents at least one of hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle, or cyano.
- Each of R 13 to R 16 independently represents an optionally substituted alkyl or an optionally substituted aryl, and X 1 represents an optionally substituted arylene having 20 or less carbon atoms.
- n is each independently an integer of 0 to 3.
- substituent in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- R 31 to R 34 are each independently any of methyl, isopropyl or phenyl
- R 35 and R 36 are each independently any of hydrogen, methyl, isopropyl or phenyl It is.
- each of R 11 and R 12 independently represents at least one of hydrogen, alkyl, optionally substituted aryl, substituted silyl, optionally substituted nitrogen-containing heterocycle, or cyano.
- Each of R 13 to R 16 independently represents an optionally substituted alkyl or an optionally substituted aryl, and X 1 represents an optionally substituted arylene having 10 or less carbon atoms.
- Y 1 is optionally substituted aryl having 14 or less carbon atoms, and n is each independently an integer of 0 to 3.
- substituent in the case of “which may be substituted” or “substituted” include aryl, heteroaryl and alkyl.
- R 31 to R 34 are each independently methyl, isopropyl or phenyl
- R 35 and R 36 are each independently hydrogen, methyl, isopropyl or phenyl. It is.
- the benzimidazole derivative is a compound represented by the following general formula (E-5).
- Ar 1 to Ar 3 are each independently hydrogen or aryl having 6 to 30 carbon atoms which may be substituted. Examples of the substituent in the case of “optionally substituted” include aryl, heteroaryl, alkyl, cyano and the like. Particularly preferred is a benzimidazole derivative wherein Ar 1 is anthryl optionally substituted with aryl, heteroaryl, alkyl or cyano.
- aryl having 6 to 30 carbon atoms include phenyl, 1-naphthyl, 2-naphthyl, acenaphthylene-1-yl, acenaphthylene-3-yl, acenaphthylene-4-yl, acenaphthylene-5-yl, and fluorene-1- Yl, fluoren-2-yl, fluoren-3-yl, fluoren-4-yl, fluoren-9-yl, phenalen-1-yl, phenalen-2-yl, 1-phenanthryl, 2-phenanthryl, 3-phenanthryl, 4-phenanthryl, 9-phenanthryl, 1-anthryl, 2-anthryl, 9-anthryl, fluoranthen-1-yl, fluoranthen-2-yl, fluoranthen-3-yl, fluoranthen-7-yl, fluoranthen-8-yl, Triphenylene-1-yl, 2-
- benzimidazole derivative examples include 1-phenyl-2- (4- (10-phenylanthracen-9-yl) phenyl) -1H-benzo [d] imidazole, 2- (4- (10- (naphthalene-2) -Yl) anthracen-9-yl) phenyl) -1-phenyl-1H-benzo [d] imidazole, 2- (3- (10- (naphthalen-2-yl) anthracen-9-yl) phenyl) -1- Phenyl-1H-benzo [d] imidazole, 5- (10- (naphthalen-2-yl) anthracen-9-yl) -1,2-diphenyl-1H-benzo [d] imidazole, 1- (4- (10 -(Naphthalen-2-yl) anthracen-9-yl) phenyl) -2-phenyl-1H-benzo [d] imidazole, 2- (4- (9,10-di (n)-
- the electron transport layer or the electron injection layer may further contain a substance capable of reducing the material forming the electron transport layer or the electron injection layer.
- a substance capable of reducing the material forming the electron transport layer or the electron injection layer various substances can be used as long as they have a certain reducing ability.
- Preferred reducing substances include alkali metals such as Na (work function 2.36 eV), K (2.28 eV), Rb (2.16 eV) or Cs (1.95 eV), and Ca (2. 9eV), Sr (2.0 to 2.5 eV) or Ba (2.52 eV), and alkaline earth metals such as those having a work function of 2.9 eV or less are particularly preferable.
- a more preferable reducing substance is an alkali metal of K, Rb or Cs, more preferably Rb or Cs, and most preferably Cs.
- alkali metals have particularly high reducing ability, and by adding a relatively small amount to the material forming the electron transport layer or the electron injection layer, the luminance of the organic EL element can be improved and the lifetime can be extended.
- a reducing substance having a work function of 2.9 eV or less a combination of these two or more alkali metals is also preferable.
- a combination containing Cs for example, Cs and Na, Cs and K, Cs and Rb, or A combination of Cs, Na and K is preferred.
- the cathode 108 serves to inject electrons into the light emitting layer 105 through the electron injection layer 107 and the electron transport layer 106.
- the material for forming the cathode 108 is not particularly limited as long as it is a substance that can efficiently inject electrons into the organic layer, but the same material as that for forming the anode 102 can be used.
- metals such as tin, indium, calcium, aluminum, silver, copper, nickel, chromium, gold, platinum, iron, zinc, lithium, sodium, potassium, cesium and magnesium or alloys thereof (magnesium-silver alloy, magnesium -Indium alloys, aluminum-lithium alloys such as lithium fluoride / aluminum, etc.) are preferred.
- Lithium, sodium, potassium, cesium, calcium, magnesium, or alloys containing these low work function metals are effective for increasing the electron injection efficiency and improving device characteristics.
- metals such as platinum, gold, silver, copper, iron, tin, aluminum and indium, or alloys using these metals, and inorganic materials such as silica, titania and silicon nitride, polyvinyl alcohol, vinyl chloride Lamination of hydrocarbon polymer compounds and the like is a preferred example.
- the method for producing these electrodes is not particularly limited as long as conduction can be achieved, such as resistance heating, electron beam evaporation, sputtering, ion plating, and coating.
- the materials used for the hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer can form each layer alone, but as a polymer binder, polyvinyl chloride, polycarbonate, Polystyrene, poly (N-vinylcarbazole), polymethyl methacrylate, polybutyl methacrylate, polyester, polysulfone, polyphenylene oxide, polybutadiene, hydrocarbon resin, ketone resin, phenoxy resin, polyamide, ethyl cellulose, vinyl acetate resin, ABS resin, polyurethane resin It can also be used by dispersing it in solvent-soluble resins such as phenol resins, xylene resins, petroleum resins, urea resins, melamine resins, unsaturated polyester resins, alkyd resins, epoxy resins, silicone resins, etc. is there.
- solvent-soluble resins such as phenol resins, xylene resins, petroleum resins, urea resins, melamine resins,
- Each layer constituting the organic electroluminescent element is formed by a method such as vapor deposition, resistance heating vapor deposition, electron beam vapor deposition, sputtering, molecular lamination method, printing method, spin coating method or cast method, coating method, etc. It can be formed by using a thin film.
- the film thickness of each layer thus formed is not particularly limited and can be appropriately set according to the properties of the material, but is usually in the range of 2 nm to 5000 nm. The film thickness can usually be measured with a crystal oscillation type film thickness measuring device or the like.
- the vapor deposition conditions vary depending on the type of material, the target crystal structure and association structure of the film, and the like.
- the deposition conditions are generally as follows: heating temperature of the deposition crucible +50 to + 400 ° C., vacuum 10 ⁇ 6 to 10 ⁇ 3 Pa, deposition rate 0.01 to 50 nm / second, substrate temperature ⁇ 150 to + 300 ° C., film thickness 2 nm It is preferable to set appropriately in the range of ⁇ 5 ⁇ m.
- an organic electric field composed of an anode / hole injection layer / hole transport layer / a light emitting layer composed of a host material and a dopant material / electron transport layer / electron injection layer / cathode.
- a method for manufacturing a light-emitting element will be described.
- a thin film of an anode material is formed on a suitable substrate by vapor deposition or the like to produce an anode, and then a thin film of a hole injection layer and a hole transport layer is formed on the anode.
- a host material and a dopant material are co-evaporated to form a thin film to form a light emitting layer.
- An electron transport layer and an electron injection layer are formed on the light emitting layer, and a thin film made of a cathode material is formed by vapor deposition. By forming it as a cathode, a desired organic electroluminescent element can be obtained.
- the order of preparation may be reversed, and the cathode, electron injection layer, electron transport layer, light emitting layer, hole transport layer, hole injection layer, and anode may be fabricated in this order. Is possible.
- the anode When a DC voltage is applied to the organic electroluminescent device thus obtained, the anode may be applied with a positive polarity and the cathode with a negative polarity. When a voltage of about 2 to 40 V is applied, the organic electroluminescent device is transparent or translucent. Luminescence can be observed from the electrode side (anode or cathode, and both). The organic electroluminescence device emits light when a pulse current or an alternating current is applied. The alternating current waveform to be applied may be arbitrary.
- the present invention can also be applied to a display device provided with an organic electroluminescent element or a lighting device provided with an organic electroluminescent element.
- a display device or an illuminating device including an organic electroluminescent element can be manufactured by a known method such as connecting the organic electroluminescent element according to the present embodiment and a known driving device, such as direct current driving, pulse driving, or alternating current. It can be driven by appropriately using a known driving method such as driving.
- Examples of the display device include a panel display such as a color flat panel display, and a flexible display such as a flexible color organic electroluminescence (EL) display (for example, JP-A-10-335066 and JP-A-2003-321546). Gazette, JP-A-2004-281086, etc.).
- Examples of the display method of the display include a matrix and / or segment method. Note that the matrix display and the segment display may coexist in the same panel.
- a matrix is a pixel in which pixels for display are arranged two-dimensionally, such as a grid or mosaic, and displays characters and images as a set of pixels.
- the shape and size of the pixel are determined by the application. For example, a square pixel with a side of 300 ⁇ m or less is usually used for displaying images and characters on a personal computer, monitor, TV, and a pixel with a side of mm order for a large display such as a display panel. become.
- monochrome display pixels of the same color may be arranged. However, in color display, red, green, and blue pixels are displayed side by side. In this case, there are typically a delta type and a stripe type.
- the matrix driving method may be either a line sequential driving method or an active matrix.
- the line-sequential driving has an advantage that the structure is simple. However, the active matrix may be superior in consideration of the operation characteristics, so that it is necessary to properly use it depending on the application.
- a pattern is formed so as to display predetermined information, and a predetermined region is caused to emit light.
- a predetermined region is caused to emit light.
- the time and temperature display in a digital clock or a thermometer the operation state display of an audio device or an electromagnetic cooker, the panel display of an automobile, etc.
- the illuminating device examples include an illuminating device such as indoor lighting, a backlight of a liquid crystal display device, and the like (for example, JP 2003-257621 A, JP 2003-277741 A, JP 2004-119211 A).
- the backlight is used mainly for the purpose of improving the visibility of a display device that does not emit light, and is used for a liquid crystal display device, a clock, an audio device, an automobile panel, a display panel, a sign, and the like.
- a backlight for liquid crystal display devices especially personal computers for which thinning is an issue, considering that conventional methods are made of fluorescent lamps and light guide plates, it is difficult to reduce the thickness.
- the backlight using the light emitting element according to the embodiment is thin and lightweight.
- the polycyclic aromatic compound according to the present invention can be used for producing an organic field effect transistor or an organic thin film solar cell in addition to the above-described organic electroluminescent element.
- An organic field effect transistor is a transistor that controls current by an electric field generated by voltage input, and includes a gate electrode in addition to a source electrode and a drain electrode. When a voltage is applied to the gate electrode, an electric field is generated, and the current can be controlled by arbitrarily blocking the flow of electrons (or holes) flowing between the source electrode and the drain electrode.
- Field effect transistors are easier to miniaturize than simple transistors (bipolar transistors), and are often used as elements constituting integrated circuits and the like.
- the structure of the organic field effect transistor is usually provided with a source electrode and a drain electrode in contact with the organic semiconductor active layer formed using the polycyclic aromatic compound according to the present invention, and further in contact with the organic semiconductor active layer.
- the gate electrode may be provided with the insulating layer (dielectric layer) interposed therebetween. Examples of the element structure include the following structures.
- Substrate / gate electrode / insulator layer / source electrode / drain electrode / organic semiconductor active layer (2) Substrate / gate electrode / insulator layer / organic semiconductor active layer / source electrode / drain electrode (3) substrate / organic Semiconductor active layer / source electrode / drain electrode / insulator layer / gate electrode (4) substrate / source electrode / drain electrode / organic semiconductor active layer / insulator layer / gate electrode It can be applied as a pixel drive switching element of an active matrix drive type liquid crystal display or an organic electroluminescence display.
- Organic thin-film solar cells have a structure in which an anode such as ITO, a hole transport layer, a photoelectric conversion layer, an electron transport layer, and a cathode are laminated on a transparent substrate such as glass.
- the photoelectric conversion layer has a p-type semiconductor layer on the anode side and an n-type semiconductor layer on the cathode side.
- the polycyclic aromatic compound according to the present invention can be used as a material for a hole transport layer, a p-type semiconductor layer, an n-type semiconductor layer, and an electron transport layer, depending on its physical properties.
- the polycyclic aromatic compound according to the present invention can function as a hole transport material or an electron transport material in an organic thin film solar cell.
- the organic thin film solar cell may appropriately include a hole block layer, an electron block layer, an electron injection layer, a hole injection layer, a smoothing layer, and the like.
- known materials used for the organic thin film solar cell can be appropriately selected and used in combination.
- Toluene was added for liquid separation, followed by purification by silica gel short pass column chromatography (developing solution: toluene) to obtain methyl 4-methoxy-2-(((trifluoromethyl) sulfonyl) oxy) benzoate (86. 0 g) was obtained.
- the reaction solution was cooled to room temperature, water and toluene were added for liquid separation, and the solvent of the organic layer was distilled off under reduced pressure.
- the obtained solid was purified by silica gel column chromatography (developing solution: heptane / toluene mixed solvent), and methyl 4 ′-(diphenylamino) -5-methoxy- [1,1′-biphenyl] -2-carboxylate ( 29.7 g) was obtained.
- the obtained precipitate was washed with water and then with methanol, and then purified by silica gel column chromatography (developing solution: heptane / toluene mixed solvent) to obtain 6,6 ′-((2-bromo-1,3- (Phenylene) bis (oxy)) bis (9,9-dimethyl-N, N-diphenyl-9H-fluoren-2-amine) (12.6 g) was obtained.
- the target product was eluted by gradually increasing the ratio of toluene in the developing solution.
- reaction solution was decompressed to distill off low-boiling components, then cooled to ⁇ 40 ° C., and boron tribromide (4.3 g) was added.
- the mixture was warmed to room temperature and stirred for 0.5 hours, then cooled to 0 ° C., N-ethyl-N-isopropylpropan-2-amine (3.8 g) was added, and the mixture was heated and stirred at 125 ° C. for 8 hours.
- the reaction solution was cooled to room temperature, an aqueous sodium acetate solution was added to stop the reaction, and toluene was added to separate the layers.
- reaction solution was decompressed to distill off low-boiling components, then cooled to ⁇ 40 ° C., and boron tribromide (5.1 g) was added. After warming to room temperature and stirring for 0.5 hour, the mixture was cooled to 0 ° C., N-ethyl-N-isopropylpropan-2-amine (4.0 g) was added, and the mixture was heated and stirred at 120 ° C. for 5 hours. The reaction solution was cooled to room temperature, an aqueous sodium acetate solution was added to stop the reaction, and toluene was added to separate the layers.
- the glass transition temperature (Tg) of the compound of the formula (1A-3) was 179.2 ° C.
- reaction solution was decompressed to distill off low-boiling components, then cooled to ⁇ 40 ° C., and boron tribromide (18.3 g) was added.
- the mixture was warmed to room temperature and stirred for 0.5 hour, then cooled to 0 ° C., N-ethyl-N-isopropylpropan-2-amine (12.6 g) was added, and the mixture was stirred at room temperature for 10 minutes.
- aluminum chloride (AlCl 3 ) 13.0 g
- the reaction solution was cooled to room temperature, an aqueous potassium acetate solution was added to stop the reaction, and toluene was added to separate the layers.
- the glass transition temperature (Tg) of the compound of the formula (1A-25) was 182.5 ° C.
- the glass transition temperature (Tg) of the compound of the formula (1B-1) was 116.6 ° C.
- the glass transition temperature (Tg) of the compound of the formula (1B-10) was 165.6 ° C.
- polycyclic aromatic compounds of the present invention can be synthesized by a method according to the synthesis example described above by appropriately changing the raw material compound.
- the fluorescence quantum yield measurement was performed by a method in which a compound to be evaluated was dispersed in a commercially available PMMA (polymethyl methacrylate) resin and then made into a thin film for evaluation.
- the measuring device used was an absolute PL quantum yield measuring device C9920-02G manufactured by Hamamatsu Photonics Co., Ltd.
- the excitation light source was a Xe lamp spectral light source 150W, and the excitation light was 320 nm monochromatic light.
- fluorescence quantum yield eta PL is given by the following equation.
- N emission is the number of photons emitted from the material
- N Absorption is the number of photons absorbed by the material
- the fluorescence quantum yield is obtained as the ratio.
- ⁇ is the correction coefficient of the measurement system
- ⁇ is the wavelength
- h is Planck's constant
- c is the speed of light
- I em ( ⁇ ) is the emission intensity of the sample
- I ex ( ⁇ ) is the intensity of the excitation light before the sample is installed
- I ′ ex ( ⁇ ) is the excitation light intensity observed when the sample is irradiated with the excitation light.
- the fluorescence quantum yield can be measured by performing two spectrum observations of I em and I ′ ex + I em .
- the same synthetic quartz substrate as the PMMA dispersion film sample was used as a blank substrate.
- the blank substrate was set in a sample holder for absolute PL quantum yield, and I ex ( ⁇ ) was measured.
- the blank substrate was removed from the sample holder, a PMMA dispersed film sample was set, and I ′ ex ( ⁇ ) + I em ( ⁇ ) was observed.
- Table 2 shows the measurement results of the comparative compounds, and the compounds described in International Publication No. 2015/102118 are listed together with their compound numbers.
- HI refers to N 4 , N 4 ′ -diphenyl-N 4 , N 4 ′ -bis (9-phenyl-9H-carbazol-3-yl)-[1,1′-biphenyl] -4, 4′-diamine
- HAT-CN is 1,4,5,8,9,12-hexaazatriphenylenehexacarbonitrile
- HT is N-([1,1′-biphenyl] -4-yl) —N- (4- (9-phenyl-9H-carbazol-3-yl) phenyl)-[1,1′-biphenyl] -4-amine
- BH1 is 9-phenyl-10- (4-phenylnaphthalene) -1-yl) anthracene
- ET-5 is 9- (7- (dimesitylboryl) -9,9-dimethyl-9H-fluoren-2-yl) -3,6-dimethyl-9H-
- Example 1 ⁇ Device using Compound (1A-1) as a dopant in the light emitting layer>
- This transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (Changzhou Industrial Co., Ltd.), a tantalum vapor deposition crucible containing HI, a tantalum vapor deposition crucible containing HAT-CN, and a tantalum containing HT.
- a tantalum deposition crucible, an aluminum nitride deposition crucible containing Liq, an aluminum nitride deposition crucible containing magnesium, and an aluminum nitride deposition crucible containing silver were mounted.
- the following layers were sequentially formed on the ITO film of the transparent support substrate.
- Depressurize the vacuum chamber to 2.0 ⁇ 10 ⁇ 4 Pa, first heat the vapor deposition crucible containing HI to vaporize to a film thickness of 40 nm, and then apply the vapor deposition crucible containing HAT-CN.
- the vapor deposition crucible containing BH1 and the vapor deposition crucible containing the compound (1A-1) of the present invention were simultaneously heated to vapor-deposit to a thickness of 20 nm to form a light emitting layer.
- the deposition rate was adjusted so that the weight ratio of BH1 to the compound (1A-1) of the present invention was about 95: 5.
- the deposition crucible containing ET-5 is heated to deposit to a thickness of 5 nm, and then the deposition crucible containing ET-6 is heated to deposit to a thickness of 25 nm.
- an electron transport layer composed of two layers was formed.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the deposition crucible containing Liq was heated to deposit at a deposition rate of 0.01 to 0.1 nm / second so as to have a film thickness of 1 nm.
- the deposition crucible containing magnesium and the deposition crucible containing silver were heated at the same time, and the cathode was formed by vapor deposition to a film thickness of 100 nm to obtain an organic electroluminescence device.
- the deposition rate was adjusted between 0.1 nm and 10 nm / second so that the atomic ratio of magnesium and silver was 10: 1.
- Tables 5 to 7 below show the material composition of each layer in the fabricated organic EL element.
- the dopant materials in Comparative Examples 11 to 24 are all compounds disclosed in International Publication No. 2015/102118.
- Example 2 ⁇ Device using Compound (1A-1) as a dopant in the light emitting layer>
- This transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (Changzhou Industrial Co., Ltd.), a tantalum vapor deposition crucible containing HI, a tantalum vapor deposition crucible containing HAT-CN, and a tantalum containing HT.
- An aluminum nitride vapor deposition crucible containing Liq, an aluminum nitride vapor deposition crucible containing magnesium, and an aluminum nitride vapor deposition crucible containing silver were mounted.
- the following layers were sequentially formed on the ITO film of the transparent support substrate.
- Depressurize the vacuum chamber to 2.0 ⁇ 10 ⁇ 4 Pa, first heat the vapor deposition crucible containing HI to vaporize to a film thickness of 40 nm, and then apply the vapor deposition crucible containing HAT-CN.
- the vapor deposition crucible containing BH1 and the vapor deposition crucible containing the compound (1A-1) of the present invention were simultaneously heated to vapor-deposit to a thickness of 25 nm to form a light emitting layer.
- the deposition rate was adjusted so that the weight ratio of BH1 to the compound (1A-1) of the present invention was approximately 98 to 2.
- the deposition crucible containing ET5 is heated to deposit to a thickness of 5 nm, and then the deposition crucible containing ET6 and the deposition crucible containing Liq are simultaneously heated to a thickness of 25 nm.
- a two-layer electron transport layer was formed by vapor deposition.
- the deposition rate was adjusted so that the weight ratio of ET6 to Liq was approximately 1: 1.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the deposition crucible containing Liq was heated to deposit at a deposition rate of 0.01 to 0.1 nm / second so as to have a film thickness of 1 nm.
- the deposition crucible containing magnesium and the deposition crucible containing silver were heated at the same time, and the cathode was formed by vapor deposition to a film thickness of 100 nm to obtain an organic electroluminescence device.
- the deposition rate was adjusted between 0.1 nm and 10 nm / second so that the atomic ratio of magnesium and silver was 10: 1.
- the characteristics at 1000 cd / m 2 emission were measured.
- the drive voltage was 3.71 V and the external quantum efficiency was 7.13% (blue emission with a wavelength of about 456 nm).
- the time for maintaining a luminance of 90% or more of the initial luminance was 134 hours.
- Example 3> ⁇ Device using compound (1A-3) as dopant in light-emitting layer>
- An organic EL device was obtained in the same manner as in Example 2, except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1A-3).
- the driving voltage is 3.61 V
- the external quantum efficiency is 7.75% (blue emission with a wavelength of about 465 nm)
- the time for maintaining 90% or more of the initial luminance was 169 hours.
- Example 4 ⁇ Device using Compound (1A-25) as a dopant for the light emitting layer>
- An organic EL device was obtained in the same manner as in Example 2, except that the compound (1A-1), which was the dopant for the light emitting layer, was changed to the compound (1A-25).
- the driving voltage is 3.86 V
- the external quantum efficiency is 6.83% (blue light emission having a wavelength of about 450 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 115 hours.
- Example 5 ⁇ Device using compound (1B-1) as dopant in light-emitting layer>
- An organic EL device was obtained in the same manner as in Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was changed to the compound (1B-1).
- the driving voltage is 4.02 V
- the external quantum efficiency is 6.28% (blue emission with a wavelength of about 449 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 105 hours.
- Example 6> ⁇ Device using compound (1B-10) as dopant in light-emitting layer>
- An organic EL device was obtained in the same manner as in Example 2, except that the compound (1A-1) as the dopant for the light emitting layer was changed to the compound (1B-10).
- the driving voltage is 4.23 V
- the external quantum efficiency is 6.42% (blue emission with a wavelength of about 461 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 167 hours.
- ⁇ Comparative Example 11> ⁇ Device using compound (1-10) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-10) described in International Publication No. 2015/102118.
- the drive voltage is 5.40 V
- the external quantum efficiency is 2.00% (blue emission with a wavelength of about 445 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 31 hours.
- ⁇ Comparative Example 12> ⁇ Device using compound (1-100) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light-emitting layer was changed to the compound (1-100) described in International Publication No. 2015/102118.
- the driving voltage is 4.72 V
- the external quantum efficiency is 2.81% (blue emission with a wavelength of about 456 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 57 hours.
- ⁇ Comparative Example 13> ⁇ Device using compound (1-141) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-141) described in International Publication No. 2015/102118.
- the driving voltage is 3.81 V
- the external quantum efficiency is 4.33% (blue emission with a wavelength of about 510 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 87 hours.
- ⁇ Comparative example 14> ⁇ Device using compound (1-176) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-176) described in International Publication No. 2015/102118.
- the driving voltage is 4.88 V
- the external quantum efficiency is 2.94% (blue emission with a wavelength of about 449 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 27 hours.
- Example 16> ⁇ Device using compound (1-2623) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained in the same manner as in Example 2, except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-2623) described in International Publication No. 2015/102118.
- the drive voltage is 4.54 V
- the external quantum efficiency is 5.07% (blue emission with a wavelength of about 456 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 82 hours.
- ⁇ Comparative Example 17> ⁇ Device using compound (1-1201) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-1201) described in International Publication No. 2015/102118.
- the driving voltage is 4.38 V
- the external quantum efficiency is 3.60% (blue emission with a wavelength of about 439 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 57 hours.
- ⁇ Comparative Example 18> ⁇ Device using compound (1-1210) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-1210) described in International Publication No. 2015/102118.
- the driving voltage is 4.42 V
- the external quantum efficiency is 4.38% (blue emission with a wavelength of about 439 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 47 hours.
- ⁇ Comparative Example 20> ⁇ Device using compound (1-1006) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-1006) described in International Publication No. 2015/102118.
- the drive voltage is 4.81 V
- the external quantum efficiency is 2.04% (blue emission with a wavelength of about 457 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 49 hours.
- ⁇ Comparative Example 21> ⁇ Device using compound (1-2305) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2, except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-2305) described in International Publication No. 2015/102118.
- the driving voltage is 3.89 V
- the external quantum efficiency is 4.50% (blue emission with a wavelength of about 459 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 79 hours.
- ⁇ Comparative Example 22> ⁇ Device using compound (1-1203) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-1203) described in International Publication No. 2015/102118.
- the driving voltage is 4.69 V
- the external quantum efficiency is 4.12% (blue emission with a wavelength of about 448 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 69 hours.
- Example 7 ⁇ Device using Compound (1A-1) as a dopant in the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the deposition rate was adjusted so that the weight ratio of BH1 to the compound (1A-1) of the present invention was about 95: 5 in the light emitting layer. .
- the driving voltage is 3.97 V
- the external quantum efficiency is 6.96% (blue emission with a wavelength of about 457 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 170 hours.
- Example 8> ⁇ Device using compound (1B-1) as dopant in light-emitting layer>
- An organic EL device was obtained in the same manner as in Example 7, except that the compound (1A-1) as the dopant for the light emitting layer was changed to the compound (1B-1).
- the driving voltage is 3.88 V
- the external quantum efficiency is 6.31% (blue emission with a wavelength of about 452 nm)
- the time for maintaining 90% or more of the initial luminance was 125 hours.
- ⁇ Comparative Example 24> ⁇ Device using compound (1-1203) described in International Publication No. 2015/102118 as a dopant for the light emitting layer>
- An organic EL device was obtained in the same manner as in Example 7, except that the compound (1A-1) as the dopant for the light emitting layer was replaced with the compound (1-1203) described in International Publication No. 2015/102118.
- the driving voltage is 4.01 V
- the external quantum efficiency is 5.37% (blue emission with a wavelength of about 453 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 51 hours.
- Example 9 ⁇ Device using compound (1B-1) as dopant in light-emitting layer>
- An organic EL device was obtained by a method according to Example 5 except that the evaporation rate was adjusted so that the weight ratio of BH1 to the compound (1B-1) of the present invention was about 92: 8 in the light emitting layer. .
- the driving voltage is 3.76 V
- the external quantum efficiency is 6.47% (blue emission with a wavelength of about 454 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 110 hours.
- Example 10> ⁇ Device using Compound (1A-1) as a dopant in the light emitting layer>
- An organic EL device was obtained by a method according to Example 2 except that the deposition rate was adjusted so that the weight ratio of BH1 to the compound (1A-1) of the present invention was approximately 90 to 10 in the light emitting layer. .
- the driving voltage is 3.79 V
- the external quantum efficiency is 6.42% (blue emission with a wavelength of about 459 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 110 hours.
- Example 11 ⁇ Device using compound (1B-1) as dopant in light-emitting layer>
- An organic EL device was obtained by the method according to Example 10 except that the compound (1A-1) as the dopant for the light emitting layer was changed to the compound (1B-1).
- the driving voltage is 3.76 V
- the external quantum efficiency is 6.23% (blue emission with a wavelength of about 454 nm)
- the time for maintaining the luminance of 90% or more of the initial luminance was 129 hours.
- Example 12 ⁇ Device using Compound (1A-1) as a dopant in the light emitting layer>
- This transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (Changzhou Industrial Co., Ltd.), a tantalum vapor deposition crucible containing HI, a tantalum vapor deposition crucible containing HAT-CN, and a tantalum containing HT.
- An aluminum nitride vapor deposition crucible containing Liq, an aluminum nitride vapor deposition crucible containing magnesium, and an aluminum nitride vapor deposition crucible containing silver were mounted.
- the following layers were sequentially formed on the ITO film of the transparent support substrate. Depressurize the vacuum chamber to 2.0 ⁇ 10 ⁇ 4 Pa, first heat the vapor deposition crucible containing HI to vaporize to a film thickness of 40 nm, and then apply the vapor deposition crucible containing HAT-CN. A hole injection layer consisting of two layers was formed by heating and evaporating to a thickness of 5 nm. Further, the deposition crucible containing HT is heated to deposit to a film thickness of 15 nm, and then the deposition crucible containing HT2 is heated to deposit to a film thickness of 10 nm. A hole transport layer was formed.
- the vapor deposition crucible containing BH1 and the vapor deposition crucible containing the compound (1A-1) of the present invention were simultaneously heated to vapor-deposit to a thickness of 25 nm to form a light emitting layer.
- the deposition rate was adjusted so that the weight ratio of BH1 to the compound (1A-1) of the present invention was approximately 98 to 2.
- the evaporation crucible containing ET7 and the evaporation crucible containing Liq were heated at the same time to form a film having a thickness of 30 nm to form an electron transport layer.
- the deposition rate was adjusted so that the weight ratio of ET7 to Liq was approximately 1: 1.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the deposition crucible containing Liq was heated to deposit at a deposition rate of 0.01 to 0.1 nm / second so as to have a film thickness of 1 nm.
- the deposition crucible containing magnesium and the deposition crucible containing silver were heated at the same time, and the cathode was formed by vapor deposition to a film thickness of 100 nm to obtain an organic electroluminescence device.
- the deposition rate was adjusted between 0.1 nm and 10 nm / second so that the atomic ratio of magnesium and silver was 10: 1.
- the characteristics at 1000 cd / m 2 emission were measured.
- the drive voltage was 4.09 V and the external quantum efficiency was 6.51% (blue emission with a wavelength of about 456 nm).
- the time for maintaining a luminance of 90% or more of the initial luminance was 581 hours.
- Example 13 ⁇ Device using Compound (1A-1) as a dopant in the light emitting layer>
- This transparent support substrate is fixed to a substrate holder of a commercially available vapor deposition apparatus (Changzhou Industrial Co., Ltd.), a tantalum vapor deposition crucible containing HI, a tantalum vapor deposition crucible containing HAT-CN, and a tantalum containing HT.
- a crucible for vapor deposition made of tantalum containing ET9, a crucible for vapor deposition made of aluminum nitride containing Liq, a crucible for vapor deposition made of aluminum nitride containing magnesium, and a crucible for vapor deposition made of aluminum nitride containing silver were mounted.
- the following layers were sequentially formed on the ITO film of the transparent support substrate. Depressurize the vacuum chamber to 2.0 ⁇ 10 ⁇ 4 Pa, first heat the vapor deposition crucible containing HI to vaporize to a film thickness of 40 nm, and then apply the vapor deposition crucible containing HAT-CN. A hole injection layer consisting of two layers was formed by heating and evaporating to a thickness of 5 nm. Further, the deposition crucible containing HT is heated to deposit to a film thickness of 15 nm, and then the deposition crucible containing HT2 is heated to deposit to a film thickness of 10 nm. A hole transport layer was formed.
- the vapor deposition crucible containing BH1 and the vapor deposition crucible containing the compound (1A-1) of the present invention were simultaneously heated to vapor-deposit to a thickness of 25 nm to form a light emitting layer.
- the deposition rate was adjusted so that the weight ratio of BH1 to the compound (1A-1) of the present invention was approximately 98 to 2.
- the deposition crucible containing ET8 is heated to deposit to a film thickness of 5 nm, and then the deposition crucible containing ET9 and the deposition crucible containing Liq are simultaneously heated to a film thickness of 25 nm.
- a two-layer electron transport layer was formed by vapor deposition.
- the deposition rate was adjusted so that the weight ratio of ET9 and Liq was approximately 1: 1.
- the deposition rate of each layer was 0.01 to 1 nm / second.
- the deposition crucible containing Liq was heated to deposit at a deposition rate of 0.01 to 0.1 nm / second so as to have a film thickness of 1 nm.
- the deposition crucible containing magnesium and the deposition crucible containing silver were heated at the same time, and the cathode was formed by vapor deposition to a film thickness of 100 nm to obtain an organic electroluminescence device.
- the deposition rate was adjusted between 0.1 nm and 10 nm / second so that the atomic ratio of magnesium and silver was 10: 1.
- the characteristics at 1000 cd / m 2 emission were measured.
- the drive voltage was 4.11 V and the external quantum efficiency was 6.99% (blue emission with a wavelength of about 454 nm).
- the time for maintaining a luminance of 90% or more of the initial luminance was 356 hours.
- the choice of materials for organic EL elements can be increased.
- a novel polycyclic aromatic compound as a material for an organic electroluminescent element, it is possible to provide an excellent organic EL element, a display device including the same, a lighting device including the same, and the like.
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Abstract
Description
下記一般式(1A)または一般式(1B)で表される多環芳香族化合物。
Arは、それぞれ独立して、アリールまたはヘテロアリールであり、
R1~R6は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R4が複数の場合、隣接するR4同士が結合してa環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R3とR6が隣接する場合には、これらは-O-、-S-、-C(-R)2-または単結合により結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qはそれぞれ独立して0~2の整数であり、rはそれぞれ独立して0~3の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、また、X2が前記N-Rである場合のRは-O-、-S-、-C(-R)2-または単結合により前記a環と結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、そして、
式(1A)または式(1B)で表される化合物における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。)
Arは、それぞれ独立して、アリールであり、
R1~R4は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R4が複数の場合、隣接するR4同士が結合してa環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qは0であり、rは0であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルである、
上記[1]に記載する多環芳香族化合物。
下記一般式(1A’)または一般式(1B’)で表される、上記[1]に記載する多環芳香族化合物。
R1~R4は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R4が複数の場合、隣接するR4同士が結合してa環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルである。)
下記一般式(1A’)で表される、上記[1]に記載する多環芳香族化合物。
R1は、それぞれ独立して、水素、炭素数6~30のアリールまたは炭素数1~24のアルキル、であり、
R2およびR3は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキル、炭素数1~24のアルコキシ、炭素数1~4のアルキルを有するトリアルキルシリルまたは炭素数6~30のアリールオキシであり、これらにおける少なくとも1つの水素は炭素数6~16のアリール、炭素数2~25のヘテロアリールまたは炭素数1~18のアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0~6の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである。)
R1は、それぞれ独立して、水素、炭素数6~12のアリールまたは炭素数1~12のアルキルであり、
R2およびR3は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキルまたは炭素数1~4のアルキルを有するトリアルキルシリルであり、
mは0または1であり、nはそれぞれ独立して0または1であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである、
上記[4]に記載する多環芳香族化合物。
R1は、それぞれ独立して、水素、炭素数6~30のアリールまたは炭素数1~24のアルキル、であり、
R2~R4は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキル、炭素数1~24のアルコキシ、炭素数1~4のアルキルを有するトリアルキルシリルまたは炭素数6~30のアリールオキシであり、これらにおける少なくとも1つの水素は炭素数6~16のアリール、炭素数2~25のヘテロアリールまたは炭素数1~18のアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0~6の整数であり、pは0~2の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである。)
R1は、それぞれ独立して、水素、炭素数6~12のアリールまたは炭素数1~12のアルキルであり、
R2~R4は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキルまたは炭素数1~4のアルキルを有するトリアルキルシリルであり、
mは0または1であり、nはそれぞれ独立して0または1であり、pは0または1であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである、
上記[7]に記載する多環芳香族化合物。
上記[1]~[9]のいずれかに記載する多環芳香族化合物を含有する、有機デバイス用材料。
前記有機デバイス用材料が、有機電界発光素子用材料、有機電界効果トランジスタ用材料または有機薄膜太陽電池用材料である、上記[10]に記載する有機デバイス用材料。
発光層用材料である、上記[11]に記載する有機電界発光素子用材料。
電子注入層用材料または電子輸送層用材料である、上記[11]に記載する有機電界発光素子用材料。
正孔注入層用材料または正孔輸送層用材料である、上記[11]に記載する有機電界発光素子用材料。
陽極および陰極からなる一対の電極と、該一対の電極間に配置され、上記[12]に記載する発光層用材料を含有する発光層とを有する、有機電界発光素子。
陽極および陰極からなる一対の電極と、該一対の電極間に配置された発光層と、前記陰極および前記発光層の間に配置され、上記[13]に記載する電子注入層用材料および/または電子輸送層用材料を含有する電子注入層および/または電子輸送層とを有する、有機電界発光素子。
陽極および陰極からなる一対の電極と、該一対の電極間に配置された発光層と、前記陽極および前記発光層の間に配置され、上記[14]に記載する正孔注入層用材料および/または正孔輸送層用材料を含有する正孔注入層および/または正孔輸送層とを有する、有機電界発光素子。
さらに、前記陰極と該発光層との間に配置される電子輸送層および/または電子注入層を有し、該電子輸送層および電子注入層の少なくとも1つは、キノリノール系金属錯体、ピリジン誘導体、フェナントロリン誘導体、ボラン誘導体およびベンゾイミダゾール誘導体からなる群から選択される少なくとも1つを含有する、上記[15]~[17]のいずれかに記載する有機電界発光素子。
前記電子輸送層および/または電子注入層が、さらに、アルカリ金属、アルカリ土類金属、希土類金属、アルカリ金属の酸化物、アルカリ金属のハロゲン化物、アルカリ土類金属の酸化物、アルカリ土類金属のハロゲン化物、希土類金属の酸化物、希土類金属のハロゲン化物、アルカリ金属の有機錯体、アルカリ土類金属の有機錯体および希土類金属の有機錯体からなる群から選択される少なくとも1つを含有する、上記[18]に記載の有機電界発光素子。
上記[15]~[19]のいずれかに記載する有機電界発光素子を備えた表示装置。
上記[15]~[19]のいずれかに記載する有機電界発光素子を備えた照明装置。
本願発明は、下記一般式(1A)または一般式(1B)で表される多環芳香族化合物である。また、本願発明は、好ましくは、下記一般式(1A’)または一般式(1B’)で表される多環芳香族化合物である。
一般式(1A)または一般式(1B)における、Arをフェニル基に限定し、R1~R6の置換基やその数のm、n、p、qおよびrを適宜限定したものが一般式(1A’)または一般式(1B’)である。
一般式(1A)や(1B)で表される多環芳香族化合物は、基本的には、まず一般式(1A)の場合は2つのフルオレン系化合物同士、一般式(1B)の場合は1つのフルオレン系化合物とa環とを結合基(X1やX2を含む基)で結合させることで中間体を製造し(第1反応)、その後に、一般式(1A)の場合は2つのフルオレン系化合物同士、一般式(1B)の場合は1つのフルオレン系化合物とa環とを結合基(B:ホウ素原子を含む基)で結合させることで最終生成物を製造することができる(第2反応)。第1反応では、例えばエーテル化反応であれば、求核置換反応、ウルマン反応といった一般的反応が利用でき、アミノ化反応で有ればブッフバルト-ハートウィッグ反応といった一般的反応が利用できる。また、第2反応では、タンデムヘテロフリーデルクラフツ反応(連続的な芳香族求電子置換反応、以下同様)が利用できる。
本発明に係る多環芳香族化合物は、例えば、有機電界発光素子の材料として用いることができる。以下に、本実施形態に係る有機EL素子について図面に基づいて詳細に説明する。図1は、本実施形態に係る有機EL素子を示す概略断面図である。
図1に示された有機電界発光素子100は、基板101と、基板101上に設けられた陽極102と、陽極102の上に設けられた正孔注入層103と、正孔注入層103の上に設けられた正孔輸送層104と、正孔輸送層104の上に設けられた発光層105と、発光層105の上に設けられた電子輸送層106と、電子輸送層106の上に設けられた電子注入層107と、電子注入層107の上に設けられた陰極108とを有する。
基板101は、有機電界発光素子100の支持体となるものであり、通常、石英、ガラス、金属、プラスチックなどが用いられる。基板101は、目的に応じて板状、フィルム状、またはシート状に形成され、例えば、ガラス板、金属板、金属箔、プラスチックフィルム、プラスチックシートなどが用いられる。なかでも、ガラス板、および、ポリエステル、ポリメタクリレート、ポリカーボネート、ポリスルホンなどの透明な合成樹脂製の板が好ましい。ガラス基板であれば、ソーダライムガラスや無アルカリガラスなどが用いられ、また、厚みも機械的強度を保つのに十分な厚みがあればよいので、例えば、0.2mm以上あればよい。厚さの上限値としては、例えば、2mm以下、好ましくは1mm以下である。ガラスの材質については、ガラスからの溶出イオンが少ない方がよいので無アルカリガラスの方が好ましいが、SiO2などのバリアコートを施したソーダライムガラスも市販されているのでこれを使用することができる。また、基板101には、ガスバリア性を高めるために、少なくとも片面に緻密なシリコン酸化膜などのガスバリア膜を設けてもよく、特にガスバリア性が低い合成樹脂製の板、フィルムまたはシートを基板101として用いる場合にはガスバリア膜を設けるのが好ましい。
陽極102は、発光層105へ正孔を注入する役割を果たすものである。なお、陽極102と発光層105との間に正孔注入層103および/または正孔輸送層104が設けられている場合には、これらを介して発光層105へ正孔を注入することになる。
正孔注入層103は、陽極102から移動してくる正孔を、効率よく発光層105内または正孔輸送層104内に注入する役割を果たすものである。正孔輸送層104は、陽極102から注入された正孔または陽極102から正孔注入層103を介して注入された正孔を、効率よく発光層105に輸送する役割を果たすものである。正孔注入層103および正孔輸送層104は、それぞれ、正孔注入・輸送材料の一種または二種以上を積層、混合するか、正孔注入・輸送材料と高分子結着剤の混合物により形成される。また、正孔注入・輸送材料に塩化鉄(III)のような無機塩を添加して層を形成してもよい。
発光層105は、電界を与えられた電極間において、陽極102から注入された正孔と、陰極108から注入された電子とを再結合させることにより発光するものである。発光層105を形成する材料としては、正孔と電子との再結合によって励起されて発光する化合物(発光性化合物)であればよく、安定な薄膜形状を形成することができ、かつ、固体状態で強い発光(蛍光)効率を示す化合物であるのが好ましい。本発明では、発光層用の材料として、上記一般式(1A)または一般式(1B)で表される多環芳香族化合物を用いることができる。
また、特開2003-347056号公報、および特開2001-307884号公報などに記載されたスチルベン構造を有するアミンを用いてもよい。
また、特開平11-97178号公報、特開2000-133457号公報、特開2000-26324号公報、特開2001-267079号公報、特開2001-267078号公報、特開2001-267076号公報、特開2000-34234号公報、特開2001-267075号公報、および特開2001-217077号公報などに記載されたペリレン誘導体を用いてもよい。
また、国際公開第2000/40586号パンフレットなどに記載されたボラン誘導体を用いてもよい。
また、特開2006-156888号公報などに記載された芳香族アミン誘導体を用いてもよい。
また、特開2004-43646号公報、特開2001-76876号公報、および特開平6-298758号公報などに記載されたクマリン誘導体を用いてもよい。
電子注入層107は、陰極108から移動してくる電子を、効率よく発光層105内または電子輸送層106内に注入する役割を果たすものである。電子輸送層106は、陰極108から注入された電子または陰極108から電子注入層107を介して注入された電子を、効率よく発光層105に輸送する役割を果たすものである。電子輸送層106および電子注入層107は、それぞれ、電子輸送・注入材料の一種または二種以上を積層、混合するか、電子輸送・注入材料と高分子結着剤の混合物により形成される。
陰極108は、電子注入層107および電子輸送層106を介して、発光層105に電子を注入する役割を果たすものである。
以上の正孔注入層、正孔輸送層、発光層、電子輸送層および電子注入層に用いられる材料は単独で各層を形成することができるが、高分子結着剤としてポリ塩化ビニル、ポリカーボネート、ポリスチレン、ポリ(N-ビニルカルバゾール)、ポリメチルメタクリレート、ポリブチルメタクリレート、ポリエステル、ポリスルホン、ポリフェニレンオキサイド、ポリブタジエン、炭化水素樹脂、ケトン樹脂、フェノキシ樹脂、ポリアミド、エチルセルロース、酢酸ビニル樹脂、ABS樹脂、ポリウレタン樹脂などの溶剤可溶性樹脂や、フェノール樹脂、キシレン樹脂、石油樹脂、ユリア樹脂、メラミン樹脂、不飽和ポリエステル樹脂、アルキド樹脂、エポキシ樹脂、シリコーン樹脂などの硬化性樹脂などに分散させて用いることも可能である。
有機電界発光素子を構成する各層は、各層を構成すべき材料を蒸着法、抵抗加熱蒸着、電子ビーム蒸着、スパッタリング、分子積層法、印刷法、スピンコート法またはキャスト法、コーティング法などの方法で薄膜とすることにより、形成することができる。このようにして形成された各層の膜厚については特に限定はなく、材料の性質に応じて適宜設定することができるが、通常2nm~5000nmの範囲である。膜厚は通常、水晶発振式膜厚測定装置などで測定できる。蒸着法を用いて薄膜化する場合、その蒸着条件は、材料の種類、膜の目的とする結晶構造および会合構造などにより異なる。蒸着条件は一般的に、蒸着用ルツボの加熱温度+50~+400℃、真空度10-6~10-3Pa、蒸着速度0.01~50nm/秒、基板温度-150~+300℃、膜厚2nm~5μmの範囲で適宜設定することが好ましい。
また、本発明は、有機電界発光素子を備えた表示装置または有機電界発光素子を備えた照明装置などにも応用することができる。
有機電界発光素子を備えた表示装置または照明装置は、本実施形態にかかる有機電界発光素子と公知の駆動装置とを接続するなど公知の方法によって製造することができ、直流駆動、パルス駆動、交流駆動など公知の駆動方法を適宜用いて駆動することができる。
本発明に係る多環芳香族化合物は、上述した有機電界発光素子の他に、有機電界効果トランジスタまたは有機薄膜太陽電池などの作製に用いることができる。
(1)基板/ゲート電極/絶縁体層/ソース電極・ドレイン電極/有機半導体活性層
(2)基板/ゲート電極/絶縁体層/有機半導体活性層/ソース電極・ドレイン電極
(3)基板/有機半導体活性層/ソース電極・ドレイン電極/絶縁体層/ゲート電極
(4)基板/ソース電極・ドレイン電極/有機半導体活性層/絶縁体層/ゲート電極
このように構成された有機電界効果トランジスタは、アクティブマトリックス駆動方式の液晶ディスプレイや有機エレクトロルミネッセンスディスプレイの画素駆動スイッチング素子等として適用できる。
式(1A-1)の化合物:16,16,19,19-テトラメチル-N2,N2,N14,N14-テトラフェニル-16,19-ジヒドロ-6,10-ジオキサ-17b-ボラインデノ[1,2-b]インデノ[1’,2’:6,7]ナフト[1,2,3-fg]アントラセン-2,14-ジアミンの合成
窒素雰囲気下、4-メトキシサリチル酸メチル(50.0g)、ピリジン(脱水)(350ml)の入ったフラスコを、氷浴で冷却した。次いで、トリフルオロメタンスルホン酸無水物(154.9g)をこの溶液に滴下した。滴下終了後に氷浴を外し、室温で2時間撹拌し、水を加えて反応を停止した。トルエンを加えて分液した後、シリカゲルショートパスカラムクロマトグラフィー(展開液:トルエン)で精製することで、メチル 4-メトキシ-2-(((トリフルオロメチル)スルホニル)オキシ)ベンゾアート(86.0g)を得た。
窒素雰囲気下、メチル 4-メトキシ-2-(((トリフルオロメチル)スルホニル)オキシ)ベンゾアート(23.0g)、(4-(ジフェニルアミノ)フェニル)ボロン酸(25.4g)、リン酸三カリウム(31.1g)、トルエン(184ml)、エタノール(27.6ml)および水(27.6ml)の懸濁溶液に、Pd(PPh3)4(2.5g)を加え、還流温度で3時間撹拌した。反応液を室温まで冷却し、水およびトルエンを加えて分液し、有機層の溶媒を減圧留去した。得られた固体をシリカゲルカラムクロマトグラフィー(展開液:ヘプタン/トルエン混合溶媒)で精製し、メチル 4’-(ジフェニルアミノ)-5-メトキシ-[1,1’-ビフェニル]-2-カルボキシラート(29.7g)を得た。この際、「有機化学実験のてびき(1)-物質取扱法と分離精製法-」株式会社化学同人出版、94頁に記載の方法を参考にして、展開液中のトルエンの比率を徐々に増加させて目的物を溶出させた。
窒素雰囲気下、メチル 4’-(ジフェニルアミノ)-5-メトキシ-[1,1’-ビフェニル]-2-カルボキシラート(11.4g)を溶解したTHF(111.4ml)溶液を水浴で冷却し、その溶液に、メチルマグネシウムブロミドTHF溶液(1.0M、295ml)を滴下した。滴下終了後、水浴を外して還流温度まで昇温して4時間撹拌した。その後、氷浴で冷却し、塩化アンモニウム水溶液を加えて反応を停止し、酢酸エチルを加えて分液した後、溶媒を減圧留去した。得られた固体をシリカゲルカラムクロマトグラフィー(展開液:トルエン)で精製し、2-(5’-(ジフェニルアミノ)-5-メトキシ-[1,1’-ビフェニル]-2-イル)プロパン-2-オール(8.3g)を得た。
窒素雰囲気下、2-(5’-(ジフェニルアミノ)-5-メトキシ-[1,1’-ビフェニル]-2-イル)プロパン-2-オール(27.0g)、TAYCACURE-15(13.5g)およびトルエン(162ml)の入ったフラスコを還流温度で2時間撹拌した。反応液を室温まで冷却し、シリカゲルショートパスカラム(展開液:トルエン)を通過させることで、TAYCACURE-15を除去した後、溶媒を減圧留去することで、6-メトキシ-9,9’-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン(25.8g)を得た。
窒素雰囲気下、6-メトキシ-9,9’-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン(25.0g)、ピリジン塩酸塩(36.9g)およびN-メチル-2-ピロリドン(NMP)(22.5ml)の入ったフラスコを還流温度で6時間撹拌した。反応液を室温まで冷却し、水および酢酸エチルを加えて分液した。溶媒を減圧留去した後、シリカゲルカラムクロマトグラフィー(展開液:トルエン)で精製することで、7-(ジフェニルアミノ)-9,9’-ジメチル-9H-フルオレン-3-オール(22.0g)を得た。
窒素雰囲気下、7-(ジフェニルアミノ)-9,9’-ジメチル-9H-フルオレン-3-オール(14.1g)、2-ブロモ-1,3-ジフルオロベンゼン(3.6g)、炭酸カリウム(12.9g)およびNMP(30ml)の入ったフラスコを、還流温度で5時間加熱撹拌した。反応停止後、反応液を室温まで冷却し、水を加えて析出した沈殿物を吸引ろ過にて採取した。得られた沈殿物を水、次いでメタノールで洗浄した後、シリカゲルカラムクロマトグラフィー(展開液:へプタン/トルエン混合溶媒)で精製して、6,6’-((2-ブロモ-1,3-フェニレン)ビス(オキシ))ビス(9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン)(12.6g)を得た。この際、展開液中のトルエンの比率を徐々に増加させて目的物を溶出させた。
窒素雰囲気下、6,6’-((2-ブロモ-1,3-フェニレン)ビス(オキシ))ビス(9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン)(11.0g)およびキシレン(60.5ml)の入ったフラスコを-40℃まで冷却し、2.6Mのn-ブチルリチウムヘキサン溶液(5.1ml)を滴下した。滴下終了後、この温度で0.5時間撹拌した後、60℃まで昇温して3時間撹拌した。その後、反応液を減圧して低沸点の成分を留去した後、-40℃まで冷却して三臭化ホウ素(4.3g)を加えた。室温まで昇温して0.5時間撹拌した後、0℃まで冷却してN-エチル-N-イソプロピルプロパン-2-アミン(3.8g)を添加し、125℃で8時間加熱撹拌した。反応液を室温まで冷却し、酢酸ナトリウム水溶液を加えて反応を停止させた後、トルエンを加えて分液した。有機層をシリカゲルショートパスカラム、次いでシリカゲルカラムクロマトグラフィー(展開液:へプタン/トルエン=4)、更に活性炭カラムクロマトグラフィー(展開液:トルエン)で精製し、式(1A-1)の化合物(1.2g)を得た。
1H-NMR(400MHz,CDCl3):δ=8.64(s,2H)、7.75(m,3H)、7.69(d,2H)、7.30(t,8H)、7.25(s,2H)、7.20(m,10H)、7.08(m,6H)、1.58(s,12H).
式(1A-3)の化合物:16,16,19,19-テトラメチル-N2,N2,N14,N14-テトラ-p-トリル-16H,19H-6,10-ジオキサ-17b-ボラインデノ[1,2-b]インデノ[1’,2’:6,7]ナフト[1,2,3-fg]アントラセン-2,14-ジアミンの合成
窒素雰囲気下、ジ-p-トリルアミン(20.0g)、2-クロロ-6-メトキシ-9,9-ジメチル-9H-フルオレン(25.2g)、Pd-132(ジョンソン・マッセイ)(0.7g)、NaOtBu(14.0g)およびトルエン(130ml)の入ったフラスコを加熱し、2時間還流した。反応液を室温まで冷却した後、水およびトルエンを加えて分液した。次に、活性炭カラムクロマトグラフィー(溶離液:トルエン)で精製して、更に、ソルミックスで洗浄を行い、4-(6-メトキシ-9,9-ジメチル-N,N-ジ-p-トリル-9H-フルオレン-2-アミンを26.8g(収率:66.1%)得た。
窒素雰囲気下、4-(6-メトキシ-9,9-ジメチル-N,N-ジ-p-トリル-9H-フルオレン-2-アミン(21.5g)、ピリジン塩酸塩(29.6g)、およびNMP(21.5ml)をフラスコに入れ、185℃で5時間加熱した。加熱終了後、反応液を室温まで冷却した後、水およびトルエンを加えて分液した。次に、有機層を無水硫酸ナトリウムで乾燥した後、乾燥剤を除去し、溶媒を減圧留去して得られた粗製品をショートカラム(溶離液:トルエン)で精製し、7-(ジ-p-トリルアミノ)-9,9-ジメチル-9H-フルオレン-3-オールを20.8g(収率:100%)得た。
窒素雰囲気下、7-(ジ-p-トリルアミノ)-9,9-ジメチル-9H-フルオレン-3-オール(20.6g)、2-ブロモ-1,3-ジフルオロベンゼン(4.9g)、炭酸カリウム(17.5g)およびNMP(39ml)の入ったフラスコを、還流温度で2時間加熱撹拌した。反応停止後、反応液を室温まで冷却し、水を加えて析出した沈殿物を吸引ろ過にて採取した。得られた沈殿物を水、次いでソルミックスで洗浄した後、シリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=2/1(容量比)の混合溶媒)で精製して、6,6’-((2-ブロモ-1,3-フェニレン)ビス(オキシ))ビス(9,9-ジメチル-N,N-ジ-p-トリル-9H-フルオレン-2-アミン)を17.3g(収率:70.7%)得た。
窒素雰囲気下、6,6’-((2-ブロモ-1,3-フェニレン)ビス(オキシ))ビス(9,9-ジメチル-N,N-ジ-p-トリル-9H-フルオレン-2-アミン)(15.0g)およびキシレン(100ml)の入ったフラスコを-40℃まで冷却し、1.6Mのn-ブチルリチウムヘキサン溶液(10.7ml)を滴下した。滴下終了後、この温度で0.5時間撹拌した後、室温まで昇温した。その後、反応液を減圧して低沸点の成分を留去した後、-40℃まで冷却して三臭化ホウ素(5.1g)を加えた。室温まで昇温して0.5時間撹拌した後、0℃まで冷却してN-エチル-N-イソプロピルプロパン-2-アミン(4.0g)を添加し、120℃で5時間加熱撹拌した。反応液を室温まで冷却し、酢酸ナトリウム水溶液を加えて反応を停止させた後、トルエンを加えて分液した。有機層をシリカゲルショートパスカラム(溶離液:トルエン)、次いで、NH2シリカゲルカラムクロマトグラフィー(溶離液:酢酸エチル→トルエン)で精製し、ソルミックスで数回、再沈殿を行った。その後、シリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=3/1(容量比))で精製した。さらに、昇華精製をして、式(1A-3)の化合物を1.5g(収率:11%)得た。
1H-NMR(CDCl3):δ=8.62(s,2H)、7.74(t,1H)、7.72(s,2H)、7.65(d,2H)、7.25~7.06(m,20H)、7.00(dd,2H)、2.35(s,12H)、1.57(s,12H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
式(1A-25)の化合物:8,16,16,19,19-ペンタメチル-N2,N2,N14,N14-テトラフェニル-16H,19H-6,10-ジオキサ-17b-ボラインデノ[1,2-b]インデノ[1’,2’:6,7]ナフト[1,2,3-fg]アントラセン-2,14-ジアミンの合成
窒素雰囲気下、7-(ジフェニルアミノ)-9,9’-ジメチル-9H-フルオレン-3-オール(39.0g)、1,3-ジフルオロ-5-メチルベンゼン(6.6g)、リン酸三カリウム(54.8g)およびNMP(98ml)の入ったフラスコを、還流温度で14時間加熱撹拌した。反応停止後、反応液を室温まで冷却し、水を加えて析出した沈殿物を吸引ろ過にて採取した。得られた沈殿物を水、次いでソルミックスで洗浄した後、シリカゲルカラムクロマトグラフィー(溶離液::へプタン/トルエン=4/1→2/1(容量比))で精製して、6,6’-((5-メチル-1,3-フェニレン)ビス(オキシ))ビス(9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン)を41.0g(収率:94.1%)得た。
窒素雰囲気下、6,6’-((5-メチル-1,3-フェニレン)ビス(オキシ))ビス(9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン)(41.0g)およびキシレン(246ml)の入ったフラスコを-10℃まで冷却し、1.6Mのn-ブチルリチウムヘキサン溶液(33.4ml)を滴下した。滴下終了後、この温度で0.5時間撹拌した後、70℃まで昇温して2時間撹拌した。その後、反応液を減圧して低沸点の成分を留去した後、-40℃まで冷却して三臭化ホウ素(18.3g)を加えた。室温まで昇温して0.5時間撹拌した後、0℃まで冷却してN-エチル-N-イソプロピルプロパン-2-アミン(12.6g)を添加し、室温で10分間撹拌した。次に、塩化アルミニウム(AlCl3)(13.0g)を加え、110℃で3時間加熱した。反応液を室温まで冷却し、酢酸カリウム水溶液を加えて反応を停止させた後、トルエンを加えて分液した。有機層をシリカゲルショートパスカラム(溶離液:トルエン)、次いで、NH2シリカゲルカラムクロマトグラフィー(溶離液:酢酸エチル→トルエン)で精製し、ソルミックス/ヘプタン(1/1の容量比)の混合溶剤で数回、再沈殿を行った。その後、シリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=3/1(容量比))で精製した。さらに、昇華精製をして、式(1A-25)の化合物を3.4g(収率:8.2%)得た。
1H-NMR(CDCl3):δ=8.62(s,2H)、7.72(s,2H)、7.68(d,2H)、7.30(t,8H)、7.25(s,2H)、7.18(d,8H)、7.08~7.03(m,8H)、2.58(s,3H)、1.57(s,12H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
窒素雰囲気下、7-(ジフェニルアミノ)-9,9’-ジメチル-9H-フルオレン-3-オール(20.0g)、2-ブロモ-1-フルオロ-3-フェノキシベンゼン(15.6g)、炭酸カリウム(18.3g)およびNMP(50ml)の入ったフラスコを、還流温度で4時間加熱撹拌した。反応停止後、反応液を室温まで冷却し、水を加えて析出した沈殿物を吸引ろ過にて採取した。得られた沈殿物を水、次いでソルミックスで洗浄した後、シリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=1/1(容量比))で精製して、6-(2-ブロモ-3-フェノキシフェノキシ)-9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミンを30.0g(収率:90.6%)得た。
窒素雰囲気下、6-(2-ブロモ-3-フェノキシフェノキシ)-9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン(28.0g)およびキシレン(200ml)の入ったフラスコを-30℃まで冷却し、1.6Mのn-ブチルリチウムヘキサン溶液(30.8ml)を滴下した。滴下終了後、室温で0.5時間撹拌した。その後、反応液を減圧して低沸点の成分を留去した後、-30℃まで冷却して三臭化ホウ素(16.8g)を加えた。室温まで昇温して0.5時間撹拌した後、0℃まで冷却してN-エチル-N-イソプロピルプロパン-2-アミン(12.6g)を添加し、室温で10分間撹拌した。次に、塩化アルミニウム(AlCl3)(12.0g)を加え、90℃で2時間加熱した。反応液を室温まで冷却し、酢酸カリウム水溶液を加えて反応を停止させた後、析出した沈殿物を吸引ろ過にて粗製品1として採取した。ろ液を酢酸エチルで抽出し、無水硫酸ナトリウムで乾燥した後、乾燥剤を除去し、溶媒を減圧留去し、粗製品2を得た。粗製品1と2を合わせて、ソルミックスおよびヘプタンでそれぞれ数回、再沈殿を行った後、NH2シリカゲルカラムクロマトグラフィー(溶離液:酢酸エチル→トルエン)で精製した。さらに、昇華精製をして、式(1B-1)の化合物を6.4g(収率:25.6%)得た。
1H-NMR(CDCl3):δ=8.72(d,1H)、8.60(s,1H)、7.79~7.68(m,4H)、7.55(d,1H)、7.41(t,1H)、7.31~7.17(m,11H)、7.09~7.05(m,3H)、1.57(s,6H).
[測定機器:Diamond DSC (PERKIN-ELMER社製);測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
式(1B-10)の化合物:5-([1,1’-ビフェニル]-4-イル)-15,15-ジメチル-N,N,2-トリフェニル-5H,15H-9-オキサ-5-アザ-16b-ボラインデノ[1,2-b]ナフト[1,2,3-fg]アントラセン-13-アミンの合成
窒素雰囲気下、7-(ジフェニルアミノ)-9,9’-ジメチル-9H-フルオレン-3-オール(9.0g)、1,2-ジブロモ-3-フルオロベンゼン(7.9g)、炭酸カリウム(8.2g)およびNMP(45ml)の入ったフラスコを、還流温度で2時間加熱撹拌した。反応停止後、反応液を室温まで冷却し、水を加えて析出した沈殿物を吸引ろ過にて採取した。得られた沈殿物を水、次いでソルミックスで洗浄した後、シリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=3/1(容量比))で精製して、6-(2,3-ジブロモフェノキシ)-9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミンを12.4g(収率:84.8%)得た。
窒素雰囲気下、6-(2,3-ジブロモフェノキシ)-9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン(10.0g)、ジ([1,1’-ビフェニル]-4-イル)アミン(5.3g)、酢酸パラジウム(0.15g)、ジシクロヘキシル(2’,6’-ジイソプロポキシ-[1,1’-ビフェニル]-2-イル)ホスファン(0.61g)、NaOtBu(2.4g)およびトルエン(35ml)の入ったフラスコを80℃で6時間加熱した。反応液を室温まで冷却した後、水およびトルエンを加えて分液した。更にシリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=2/1(容量比))で精製して、6-(2-ブロモ-3-(ジ([1,1’-ビフェニル]-4-イル)アミノ)フェノキシ)-9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミンを7.4g(収率:53.1%)得た。
窒素雰囲気下、6-(2-ブロモ-3-(ジ([1,1’-ビフェニル]-4-イル)アミノ)フェノキシ)-9,9-ジメチル-N,N-ジフェニル-9H-フルオレン-2-アミン(7.9g)およびテトラヒドロフラン(42ml)をフラスコに入れ、-40℃まで冷却し、1.6Mのn-ブチルリチウムヘキサン溶液(6ml)を滴下した。滴下終了後、この温度で1時間撹拌した後、トリメチルボレート(1.7g)を加えた。室温まで昇温して2時間撹拌した。その後、水(100ml)をゆっくり滴下した。次に、反応混合液を酢酸エチルで抽出し、無水硫酸ナトリウムで乾燥した後、乾燥剤を除去して、ジメチル (2-(ジ([1,1’-ビフェニル]-4-イル)アミノ)-6-((7-(ジフェニルアミノ)-9,9-ジメチル-9H-フルオレン-3-イル)オキシ)フェニル)ボロネートを7.0g(収率:100%)得た。
窒素雰囲気下、ジメチル (2-(ジ([1,1’-ビフェニル]-4-イル)アミノ)-6-((7-(ジフェニルアミノ)-9,9-ジメチル-9H-フルオレン-3-イル)オキシ)フェニル)ボロネート(6.5g)、塩化アルミニウム(10.3g)およびトルエン(39ml)をフラスコに入れて3分間攪拌した。その後、N-エチル-N-イソプロピルプロパン-2-アミン(2.5g)を加え、105℃で1時間加熱撹拌した。加熱終了後に反応液を冷却し、氷水(20ml)を添加した。その後、反応混合液をトルエンで抽出し、有機層をシリカゲルショートパスカラム(溶離液:トルエン)、次いでシリカゲルカラムクロマトグラフィー(溶離液:へプタン/トルエン=3/1(容量比))で精製した後、ヘプタンで再沈殿を行い、さらに、NH2シリカゲルでカラム(溶媒:ヘプタン/トルエン=1/1(容量比))で精製した。最後に、昇華精製をして、式(1B-10)の化合物を0.74g(収率:12.3%)得た。
1H-NMR(CDCl3):δ=9.22(s,1H)、8.78(s,1H)、7.96(d,2H)、7.80~7.77(m,6H)、7.71(d,1H)、7.59~7.44(m,8H)、7.39(t,1H)、7.32~7.29(m,4H)、7.71(d,1H)、7.19(dd,4H)、7.12~7.06(m,4H)、7.00(d,1H)、6.45(d,1H)、1.57(s,6H).
[測定機器:Diamond DSC (PERKIN-ELMER社製); 測定条件:冷却速度200℃/Min.、昇温速度10℃/Min.]
式(1A-1)、式(1A-3)、式(1A-25)、式(1B-1)、式(1B-10)で表される化合物および比較例の化合物の蛍光量子収率を測定した。蛍光量子収率測定は、評価対象の化合物を市販のPMMA(ポリメチルメタクリレート)樹脂に分散後、薄膜化して評価する手法にて行った。
実施例1および比較例1~10に係る有機EL素子を作製し、1000cd/m2の輝度が得られる電流密度で駆動した際の外部量子効率を測定した。作製した有機EL素子における、各層の材料構成を下記表3に示す。なお、比較例1~10におけるドーパント材料は全て国際公開第2015/102118号公報に開示された化合物である。
<化合物(1A-1)を発光層のドーパントに用いた素子>
スパッタリングにより180nmの厚さに製膜したITOを150nmまで研磨した、26mm×28mm×0.7mmのガラス基板((株)オプトサイエンス)を透明支持基板とした。この透明支持基板を市販の蒸着装置((株)長州産業)の基板ホルダーに固定し、HIを入れたタンタル製蒸着用ルツボ、HAT-CNを入れたタンタル製蒸着用ルツボ、HTを入れたタンタル製蒸着用ルツボ、BH1を入れたタンタル製蒸着用ルツボ、本発明の化合物(1A-1)を入れたタンタル製蒸着用ルツボ、ET-5を入れたタンタル製蒸着用ルツボ、ET-6を入れたタンタル製蒸着用ルツボ、Liqを入れた窒化アルミニウム製蒸着用ルツボ、マグネシウムを入れた窒化アルミニウム製蒸着用ルツボおよび銀を入れた窒化アルミニウム製蒸着用ルツボを装着した。
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2680)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2679)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-422)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-1145)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2681)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2682)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2626)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2683)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2699)>
<ドーパント材料:国際公開第2015/102118号公報に記載の化合物(1-2676)>
<先行文献に記載の化合物(1-2676)を発光層のドーパント材料に用いた素子>
実施例2~13および比較例11~24に係る有機EL素子を作製し、それぞれ1000cd/m2発光時の特性である電圧(V)、EL発光波長(nm)および外部量子効率(%)の測定し、次に10mA/cm2の電流密度で定電流駆動した際の初期輝度の90%以上の輝度を保持する時間を測定した。以下、実施例および比較例について詳細に説明する。
<化合物(1A-1)を発光層のドーパントに用いた素子>
スパッタリングにより180nmの厚さに製膜したITOを150nmまで研磨した、26mm×28mm×0.7mmのガラス基板((株)オプトサイエンス)を透明支持基板とした。この透明支持基板を市販の蒸着装置((株)長州産業)の基板ホルダーに固定し、HIを入れたタンタル製蒸着用ルツボ、HAT-CNを入れたタンタル製蒸着用ルツボ、HTを入れたタンタル製蒸着用ルツボ、BH1を入れたタンタル製蒸着用ルツボ、本発明の化合物(1A-1)を入れたタンタル製蒸着用ルツボ、ET5を入れたタンタル製蒸着用ルツボ、ET6を入れたタンタル製蒸着用ルツボ、Liqを入れた窒化アルミニウム製蒸着用ルツボ、マグネシウムを入れた窒化アルミニウム製蒸着用ルツボおよび銀を入れた窒化アルミニウム製蒸着用ルツボを装着した。
<化合物(1A-3)を発光層のドーパントに用いた素子>
発光層のドーパントである化合物(1A-1)を化合物(1A-3)に替えた以外は実施例2に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.61V、外部量子効率は7.75%(波長約465nmの青色発光)であり、その時のCIE色度は(x,y)=(0.128,0.127)であった。また、初期輝度の90%以上の輝度を保持する時間は169時間であった。
<化合物(1A-25)を発光層のドーパントに用いた素子>
発光層のドーパントである化合物(1A-1)を化合物(1A-25)に替えた以外は実施例2に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.86V、外部量子効率は6.83%(波長約450nmの青色発光)であり、その時のCIE色度は(x,y)=(0.144,0.062)であった。また、初期輝度の90%以上の輝度を保持する時間は115時間であった。
<化合物(1B-1)を発光層のドーパントに用いた素子>
発光層のドーパントである化合物(1A-1)を化合物(1B-1)に替えた以外は実施例2に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は4.02V、外部量子効率は6.28%(波長約449nmの青色発光)であり、その時のCIE色度は(x,y)=(0.144,0.067)であった。また、初期輝度の90%以上の輝度を保持する時間は105時間であった。
<化合物(1B-10)を発光層のドーパントに用いた素子>
発光層のドーパントである化合物(1A-1)を化合物(1B-10)に替えた以外は実施例2に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は4.23V、外部量子効率は6.42%(波長約461nmの青色発光)であり、その時のCIE色度は(x,y)=(0.129,0.106)であった。また、初期輝度の90%以上の輝度を保持する時間は167時間であった。
<国際公開第2015/102118号公報に記載の化合物(1-10)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-100)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-141)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-176)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-447)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-2623)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-1201)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-1210)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-79)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-1006)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-2305)を発光層のドーパントに用いた素子>
<比較例22>
<国際公開第2015/102118号公報に記載の化合物(1-1203)を発光層のドーパントに用いた素子>
<化合物(1A-1)を発光層のドーパントに用いた素子>
発光層において、BH1と本発明の化合物(1A-1)の重量比がおよそ95対5になるように蒸着速度を調節したことの以外は実施例2に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.97V、外部量子効率は6.96%(波長約457nmの青色発光)であり、その時のCIE色度は(x,y)=(0.135,0.096)であった。また、初期輝度の90%以上の輝度を保持する時間は170時間であった。
<化合物(1B-1)を発光層のドーパントに用いた素子>
発光層のドーパントである化合物(1A-1)を化合物(1B-1)に替えた以外は実施例7に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.88V、外部量子効率は6.31%(波長約452nmの青色発光)であり、その時のCIE色度は(x,y)=(0.142,0.076)であった。また、初期輝度の90%以上の輝度を保持する時間は125時間であった。
<国際公開第2015/102118号公報に記載の化合物(1-2679)を発光層のドーパントに用いた素子>
<国際公開第2015/102118号公報に記載の化合物(1-1203)を発光層のドーパントに用いた素子>
<化合物(1B-1)を発光層のドーパントに用いた素子>
発光層において、BH1と本発明の化合物(1B-1)の重量比がおよそ92対8になるように蒸着速度を調節したことの以外は実施例5に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.76V、外部量子効率は6.47%(波長約454nmの青色発光)であり、その時のCIE色度は(x,y)=(0.140,0.085)であった。また、初期輝度の90%以上の輝度を保持する時間は110時間であった。
<化合物(1A-1)を発光層のドーパントに用いた素子>
発光層において、BH1と本発明の化合物(1A-1)の重量比がおよそ90対10になるように蒸着速度を調節したことの以外は実施例2に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.79V、外部量子効率は6.42%(波長約459nmの青色発光)であり、その時のCIE色度は(x,y)=(0.132,0.112)であった。また、初期輝度の90%以上の輝度を保持する時間は110時間であった。
<化合物(1B-1)を発光層のドーパントに用いた素子>
発光層のドーパントである化合物(1A-1)を化合物(1B-1)に替えた以外は実施例10に準じた方法で有機EL素子を得た。同様にして特性を測定すると、駆動電圧は3.76V、外部量子効率は6.23%(波長約454nmの青色発光)であり、その時のCIE色度は(x,y)=(0.140,0.090)であった。また、初期輝度の90%以上の輝度を保持する時間は129時間であった。
<化合物(1A-1)を発光層のドーパントに用いた素子>
スパッタリングにより180nmの厚さに製膜したITOを150nmまで研磨した、26mm×28mm×0.7mmのガラス基板((株)オプトサイエンス)を透明支持基板とした。この透明支持基板を市販の蒸着装置((株)長州産業)の基板ホルダーに固定し、HIを入れたタンタル製蒸着用ルツボ、HAT-CNを入れたタンタル製蒸着用ルツボ、HTを入れたタンタル製蒸着用ルツボ、HT2を入れたタンタル製蒸着用ルツボ、BH1を入れたタンタル製蒸着用ルツボ、本発明の化合物(1A-1)を入れたタンタル製蒸着用ルツボ、ET7を入れたタンタル製蒸着用ルツボ、Liqを入れた窒化アルミニウム製蒸着用ルツボ、マグネシウムを入れた窒化アルミニウム製蒸着用ルツボおよび銀を入れた窒化アルミニウム製蒸着用ルツボを装着した。
<化合物(1A-1)を発光層のドーパントに用いた素子>
スパッタリングにより180nmの厚さに製膜したITOを150nmまで研磨した、26mm×28mm×0.7mmのガラス基板((株)オプトサイエンス)を透明支持基板とした。この透明支持基板を市販の蒸着装置((株)長州産業)の基板ホルダーに固定し、HIを入れたタンタル製蒸着用ルツボ、HAT-CNを入れたタンタル製蒸着用ルツボ、HTを入れたタンタル製蒸着用ルツボ、HT2を入れたタンタル製蒸着用ルツボ、BH1を入れたタンタル製蒸着用ルツボ、本発明の化合物(1A-1)を入れたタンタル製蒸着用ルツボ、ET8を入れたタンタル製蒸着用ルツボ、ET9を入れたタンタル製蒸着用ルツボ、Liqを入れた窒化アルミニウム製蒸着用ルツボ、マグネシウムを入れた窒化アルミニウム製蒸着用ルツボおよび銀を入れた窒化アルミニウム製蒸着用ルツボを装着した。
101 基板
102 陽極
103 正孔注入層
104 正孔輸送層
105 発光層
106 電子輸送層
107 電子注入層
108 陰極
Claims (21)
- 下記一般式(1A)または一般式(1B)で表される多環芳香族化合物。
(上記式(1A)または式(1B)中、
Arは、それぞれ独立して、アリールまたはヘテロアリールであり、
R1~R6は、それぞれ独立して、水素、アリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R4が複数の場合、隣接するR4同士が結合してa環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノ、ジヘテロアリールアミノ、アリールヘテロアリールアミノ、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリール、ジアリールアミノまたはアルキルで置換されていてもよく、
R3とR6が隣接する場合には、これらは-O-、-S-、-C(-R)2-または単結合により結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qはそれぞれ独立して0~2の整数であり、rはそれぞれ独立して0~3の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルであり、また、X2が前記N-Rである場合のRは-O-、-S-、-C(-R)2-または単結合により前記a環と結合していてもよく、前記-C(-R)2-のRは水素または炭素数1~6のアルキルであり、そして、
式(1A)または式(1B)で表される化合物における少なくとも1つの水素がハロゲンまたは重水素で置換されていてもよい。) - Arは、それぞれ独立して、アリールであり、
R1~R4は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R4が複数の場合、隣接するR4同士が結合してa環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、qは0であり、rは0であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルである、
請求項1に記載する多環芳香族化合物。 - 下記一般式(1A’)または一般式(1B’)で表される、請求項1に記載する多環芳香族化合物。
(上記式(1A’)または式(1B’)中、
R1~R4は、それぞれ独立して、水素、アリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシであり、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
R4が複数の場合、隣接するR4同士が結合してa環と共にアリール環またはヘテロアリール環を形成していてもよく、形成された環における少なくとも1つの水素はアリール、ヘテロアリール、アルキル、アルコキシ、トリアルキルシリルまたはアリールオキシで置換されていてもよく、これらにおける少なくとも1つの水素はアリール、ヘテロアリールまたはアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0からArに最大置換可能な数までの整数であり、pは0~4の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~12のアリール、炭素数2~15のヘテロアリールまたは炭素数1~6のアルキルである。) - 下記一般式(1A’)で表される、請求項1に記載する多環芳香族化合物。
(上記式(1A’)中、
R1は、それぞれ独立して、水素、炭素数6~30のアリールまたは炭素数1~24のアルキル、であり、
R2およびR3は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキル、炭素数1~24のアルコキシ、炭素数1~4のアルキルを有するトリアルキルシリルまたは炭素数6~30のアリールオキシであり、これらにおける少なくとも1つの水素は炭素数6~16のアリール、炭素数2~25のヘテロアリールまたは炭素数1~18のアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0~6の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである。) - R1は、それぞれ独立して、水素、炭素数6~12のアリールまたは炭素数1~12のアルキルであり、
R2およびR3は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキルまたは炭素数1~4のアルキルを有するトリアルキルシリルであり、
mは0または1であり、nはそれぞれ独立して0または1であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである、
請求項4に記載する多環芳香族化合物。 - 下記一般式(1B’)で表される、請求項1に記載する多環芳香族化合物。
(上記式(1B’)中、
R1は、それぞれ独立して、水素、炭素数6~30のアリールまたは炭素数1~24のアルキル、であり、
R2~R4は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキル、炭素数1~24のアルコキシ、炭素数1~4のアルキルを有するトリアルキルシリルまたは炭素数6~30のアリールオキシであり、これらにおける少なくとも1つの水素は炭素数6~16のアリール、炭素数2~25のヘテロアリールまたは炭素数1~18のアルキルで置換されていてもよく、
mは0~3の整数であり、nはそれぞれ独立して0~6の整数であり、pは0~2の整数であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである。) - R1は、それぞれ独立して、水素、炭素数6~12のアリールまたは炭素数1~12のアルキルであり、
R2~R4は、それぞれ独立して、水素、炭素数6~30のアリール、炭素数2~30のヘテロアリール、炭素数1~24のアルキルまたは炭素数1~4のアルキルを有するトリアルキルシリルであり、
mは0または1であり、nはそれぞれ独立して0または1であり、pは0または1であり、
X1およびX2は、それぞれ独立して、OまたはN-Rであり、前記N-RのRは炭素数6~10のアリール、炭素数2~10のヘテロアリールまたは炭素数1~4のアルキルである、
請求項7に記載する多環芳香族化合物。 - 請求項1~9のいずれかに記載する多環芳香族化合物を含有する、有機デバイス用材料。
- 前記有機デバイス用材料が、有機電界発光素子用材料、有機電界効果トランジスタ用材料または有機薄膜太陽電池用材料である、請求項10に記載する有機デバイス用材料。
- 発光層用材料である、請求項11に記載する有機電界発光素子用材料。
- 電子注入層用材料または電子輸送層用材料である、請求項11に記載する有機電界発光素子用材料。
- 正孔注入層用材料または正孔輸送層用材料である、請求項11に記載する有機電界発光素子用材料。
- 陽極および陰極からなる一対の電極と、該一対の電極間に配置され、請求項12に記載する発光層用材料を含有する発光層とを有する、有機電界発光素子。
- 陽極および陰極からなる一対の電極と、該一対の電極間に配置された発光層と、前記陰極および前記発光層の間に配置され、請求項13に記載する電子注入層用材料および/または電子輸送層用材料を含有する電子注入層および/または電子輸送層とを有する、有機電界発光素子。
- 陽極および陰極からなる一対の電極と、該一対の電極間に配置された発光層と、前記陽極および前記発光層の間に配置され、請求項14に記載する正孔注入層用材料および/または正孔輸送層用材料を含有する正孔注入層および/または正孔輸送層とを有する、有機電界発光素子。
- さらに、前記陰極と該発光層との間に配置される電子輸送層および/または電子注入層を有し、該電子輸送層および電子注入層の少なくとも1つは、キノリノール系金属錯体、ピリジン誘導体、フェナントロリン誘導体、ボラン誘導体およびベンゾイミダゾール誘導体からなる群から選択される少なくとも1つを含有する、請求項15~17のいずれかに記載する有機電界発光素子。
- 前記電子輸送層および/または電子注入層が、さらに、アルカリ金属、アルカリ土類金属、希土類金属、アルカリ金属の酸化物、アルカリ金属のハロゲン化物、アルカリ土類金属の酸化物、アルカリ土類金属のハロゲン化物、希土類金属の酸化物、希土類金属のハロゲン化物、アルカリ金属の有機錯体、アルカリ土類金属の有機錯体および希土類金属の有機錯体からなる群から選択される少なくとも1つを含有する、請求項18に記載の有機電界発光素子。
- 請求項15~19のいずれかに記載する有機電界発光素子を備えた表示装置。
- 請求項15~19のいずれかに記載する有機電界発光素子を備えた照明装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017562549A JP6611825B2 (ja) | 2016-01-21 | 2017-01-13 | 多環芳香族化合物 |
| US16/070,910 US10811613B2 (en) | 2016-01-21 | 2017-01-13 | Polycyclic aromatic compound |
| KR1020187005452A KR102633065B1 (ko) | 2016-01-21 | 2017-01-13 | 다환 방향족 화합물 |
| CN201780003717.3A CN108473511B (zh) | 2016-01-21 | 2017-01-13 | 多环芳香族化合物、有机器件用材料、发光元件及装置 |
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| JP (1) | JP6611825B2 (ja) |
| KR (1) | KR102633065B1 (ja) |
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| WO (1) | WO2017126443A1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2017126443A1 (ja) | 2018-05-31 |
| JP6611825B2 (ja) | 2019-11-27 |
| US10811613B2 (en) | 2020-10-20 |
| KR102633065B1 (ko) | 2024-02-02 |
| CN108473511B (zh) | 2020-11-06 |
| KR20180108559A (ko) | 2018-10-04 |
| CN108473511A (zh) | 2018-08-31 |
| US20190027694A1 (en) | 2019-01-24 |
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