WO2013018658A1 - 高分子化合物及びそれを用いた有機トランジスタ - Google Patents
高分子化合物及びそれを用いた有機トランジスタ Download PDFInfo
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Definitions
- the present invention relates to a polymer compound and an organic transistor using the same.
- the organic semiconductor material is used as a constituent material of an organic transistor, compared to an inorganic transistor using a conventional inorganic semiconductor material, it is expected to reduce the weight of the device, the manufacturing cost, and the manufacturing temperature. Research and development is actively conducted.
- organic semiconductor materials those that have excellent chemical stability and are soluble in solvents can be easily and inexpensively thinned by a coating method, which contributes particularly to lowering the manufacturing cost and manufacturing temperature of organic transistors. To do. Therefore, a high molecular compound that has a high degree of freedom in molecular design and can easily provide a compound that is soluble in a solvent has attracted particular attention.
- the organic transistor has a problem that the field effect mobility is lower than that of the inorganic transistor.
- the field effect mobility of the organic transistor depends on the field effect mobility of the organic semiconductor material contained in the active layer. Therefore, an organic semiconductor material having high charge mobility is desired in order to improve the field effect mobility of the organic transistor.
- Organic semiconductor materials are generally a group of compounds having a ⁇ -conjugated system in the molecule, and the charge moves through the ⁇ -conjugated system. Therefore, it is possible to increase the charge mobility of organic semiconductor materials by selecting and combining various condensed ring compounds having ⁇ -conjugated bonds as structural units and optimizing the arrangement of ⁇ -conjugated bonds in organic semiconductor materials. become.
- Patent Document 1 proposes the following polymer compound as an organic semiconductor material used for an organic transistor.
- an organic transistor containing the above polymer compound in an active layer has a problem that field effect mobility is not sufficient.
- An object of the present invention is to provide a polymer compound having a sufficiently high field effect mobility when used in an active layer of an organic transistor.
- the present invention has the formula
- each E independently represents —O—, —S— or —Se—.
- R 1 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, an alkylthio group which may have a substituent, an aryl group, A heteroaryl group or a halogen atom is represented.
- R 2 each independently represents a hydrogen atom, an alkyl group optionally having a substituent, an aryl group, a heteroaryl group or a halogen atom, or two R 2 are connected to form a ring, and the rest
- Each R 2 independently represents a hydrogen atom, an optionally substituted alkyl group, an aryl group, a heteroaryl group, or a halogen atom.
- the structural unit represented by the formula is different from the structural unit represented by the formula (1)
- Ar 1 represents a divalent aromatic group, a group represented by —CR 3 ⁇ CR 3 —, or a group represented by —C ⁇ C—.
- R 3 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group, a heteroaryl group or a cyano group.
- the polymer compound containing the structural unit represented by these is provided.
- the present invention also provides an organic semiconductor material containing the polymer compound.
- the present invention also provides an organic semiconductor element having an organic layer containing the organic semiconductor material.
- each E independently represents —O—, —S— or —Se—.
- R 1 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, an alkylthio group which may have a substituent, an aryl group, A heteroaryl group or a halogen atom is represented.
- R 2 each independently represents a hydrogen atom, an alkyl group optionally having a substituent, an aryl group, a heteroaryl group or a halogen atom, or two R 2 are connected to form a ring, and the rest
- Each R 2 independently represents a hydrogen atom, an optionally substituted alkyl group, an aryl group, a heteroaryl group, or a halogen atom.
- R 6 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, an alkylthio group which may have a substituent, an aryl group, A heteroaryl group or a halogen atom is represented. ] [Wherein, E, R 1 , R 2 and R 6 represent the same meaning as described above. ]
- the organic transistor containing the polymer compound of the present invention in the active layer exhibits high field effect mobility.
- the “structural unit” means a unit structure present in one or more polymer compounds.
- the “structural unit” is preferably contained in the polymer compound as a “repeating unit” (that is, a unit structure present in two or more in the polymer compound).
- the polymer compound of the present invention includes a structural unit represented by the formula (1) (hereinafter sometimes referred to as “first structural unit”).
- the first structural unit may be contained alone or in combination of two or more in the polymer compound.
- each E independently represents —O—, —S— or —Se—.
- E is preferably -S- from the viewpoint of the ease of synthesis of the monomer used as the raw material of the polymer compound of the present invention.
- each R 1 independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, or an alkylthio which may have a substituent.
- the alkyl group may be linear or branched, and may be a cycloalkyl group.
- the alkyl group usually has 1 to 60 carbon atoms, preferably 1 to 20 carbon atoms.
- a linear alkyl group and a branched alkyl group are preferable, and a linear alkyl group is more preferable.
- alkyl group examples include a straight chain alkyl group such as a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-hexyl group, an n-octyl group, an n-dodecyl group, and an n-octadecyl group, Examples thereof include branched alkyl groups such as isopropyl group, isobutyl group, sec-butyl group, tert-butyl group, 2-ethylhexyl group and 3,7-dimethyloctyl group, and cycloalkyl groups such as cyclopentyl group and cyclohexyl group.
- the alkyl group may have a substituent, and examples of the substituent that the alkyl group may have include an alkoxy group, an aryl group, and a halogen atom.
- substituents that the alkyl group may have include an alkoxy group, an aryl group, and a halogen atom.
- Specific examples of the alkyl group having a substituent include a methoxyethyl group, a benzyl group, a trifluoromethyl group, and a perfluorohexyl group.
- the alkoxy group may have a substituent, and the alkoxy group excluding the substituent usually has 1 to 20 carbon atoms.
- the alkoxy group may be linear or branched, and may be a cycloalkoxy group. Specific examples of the alkoxy group include n-butyloxy group, n-hexyloxy group, 2-ethylhexyloxy group, 3,7-dimethyloctyloxy group, n-dodecyloxy group and the like.
- linear alkyloxy groups such as an n-butyloxy group, an n-hexyloxy group, and an n-dodecyloxy group are preferable.
- the alkylthio group may have a substituent, and the alkylthio group excluding the substituent usually has 1 to 20 carbon atoms.
- the alkylthio group may be linear or branched, and may be a cycloalkylthio group. Specific examples of the alkylthio group include n-butylthio group, n-hexylthio group, 2-ethylhexylthio group, 3,7-dimethyloctylthio group, n-dodecylthio group and the like.
- Examples of the substituent that the alkylthio group may have include an aryl group and a halogen atom.
- linear alkylthio groups such as n-butylthio group, n-hexylthio group, and n-dodecylthio group are preferable.
- An aryl group is an atomic group obtained by removing one hydrogen atom directly bonded to an aromatic ring from an aromatic hydrocarbon compound which may have a substituent, a group having a benzene ring, a group having a condensed ring, an independent group A group in which two or more aromatic rings or condensed rings are directly bonded.
- the aryl group usually has 6 to 60 carbon atoms, preferably 6 to 20 carbon atoms.
- Aryl groups include phenyl, 1-naphthyl, 2-naphthyl, 1-anthracenyl, 2-anthracenyl, 9-anthracenyl, 1-pyrenyl, 2-pyrenyl, 4-pyrenyl, 2- Examples include fluorenyl group, 3-fluorenyl group, 4-fluorenyl group, 4-phenylphenyl group, 4-hexylphenyl group and the like.
- substituent that the aromatic hydrocarbon compound may have include an alkoxy group, an alkylthio group, a heteroaryl group, and a halogen atom.
- the aryl group containing these groups include 3,5-dimethoxyphenyl group and pentafluorophenyl group.
- the aromatic hydrocarbon compound has a substituent, the substituent is preferably an alkyl group.
- a heteroaryl group is an atomic group obtained by removing one hydrogen atom directly bonded to an aromatic ring from an aromatic compound having aromaticity which may have a substituent, a group having a condensed ring, independently A group in which two or more heteroaromatic rings or fused rings are directly bonded.
- the heteroaryl group usually has 2 to 60 carbon atoms, and preferably 3 to 20 carbon atoms.
- Heteroaryl groups include 2-furyl group, 3-furyl group, 2-thienyl group, 3-thienyl group, 2-pyrrolyl group, 3-pyrrolyl group, 2-oxazolyl group, 2-thiazolyl group, 2-imidazolyl group 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 2-benzofuryl group, 2-benzothienyl group, 2-thienothienyl group and the like.
- substituent that the heterocyclic compound may have include an alkyl group, an alkoxy group, an alkylthio group, an aryl group, and a halogen atom.
- Examples of the heteroaryl group containing these groups include 5-octyl-2-thienyl group and 5-phenyl-2-furyl group.
- the substituent is preferably an alkyl group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- R 1 is preferably a hydrogen atom from the viewpoint of ease of synthesis of a monomer that is a raw material for the polymer compound of the present invention.
- Each R 2 independently represents a hydrogen atom, an alkyl group optionally having a substituent, an aryl group, a heteroaryl group or a halogen atom, or two R 2 linking to form a ring;
- the remaining R 2 each independently represents a hydrogen atom, an optionally substituted alkyl group, an aryl group, a heteroaryl group or a halogen atom.
- R 2 The definition, specific examples of the alkyl group, aryl group, heteroaryl group or halogen atom represented by R 2 are the definition, specific examples of the alkyl group, aryl group, heteroaryl group or halogen atom represented by R 1 described above. Same as example.
- the ring When two R 2 are linked to form a ring, the ring includes a cyclopentane ring which may have a substituent, a cyclohexane ring which may have a substituent, and a substituent. And an optional cycloheptane ring.
- R 2 is preferably a hydrogen atom or an alkyl group which may have a substituent. Moreover, it is preferable that several R ⁇ 2 > is the same alkyl group.
- Examples of the first structural unit include structural units represented by formula (1-1) to formula (1-12). Of these, the structural unit represented by the formula (1-1) is preferable from the viewpoint of ease of synthesis of the monomer that is a raw material of the polymer compound of the present invention.
- each R a independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, or an alkylthio group which may have a substituent.
- n independently represents an integer of 1 to 20.
- R is represented by a, an alkyl group, an alkoxy group, an alkylthio group, an aryl group, as defined or heteroaryl group, specific examples include alkyl groups represented by the aforementioned R 1, an alkoxy group, an alkylthio group, an aryl group or a hetero The definition of the aryl group is the same as the specific example.
- the first structural unit includes a structure in which the 3-position and 3'-position of bichalcogenophene are cross-linked with ethylene. Since this structure has an effect of fixing the dihedral angle between bichalcogenophenes, it is presumed that it works favorably in the field effect mobility.
- the polymer compound of the present invention includes a structural unit represented by the formula (2) (hereinafter sometimes referred to as “second structural unit”).
- the second structural unit may be contained alone or in combination of two or more in the polymer compound.
- Ar 1 represents a divalent aromatic group, a group represented by —CR 3 ⁇ CR 3 —, or a group represented by —C ⁇ C—.
- R 3 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group, a heteroaryl group or a cyano group.
- the divalent aromatic group is an atomic group obtained by removing two hydrogen atoms directly bonded to a carbon atom constituting an aromatic ring from an aromatic compound which may have a substituent, and a group having a benzene ring, It includes a group having a condensed ring, a group in which two or more independent aromatic rings or two or more condensed rings are directly bonded.
- substituent include an alkyl group, an alkoxy group, an alkylthio group, an aryl group, a heteroaryl group, and a halogen atom.
- alkyl groups alkoxy groups, alkylthio groups, aryl groups, heteroaryl groups and halogen atoms
- specific examples are alkyl groups, alkoxy groups, alkylthio groups, aryl groups, heteroaryl groups and halogen atoms represented by R 1 Definitions and examples are the same.
- Divalent aromatic groups include phenylene group, naphthalenediyl group, anthracenediyl group, phenanthenediyl group, tetracenediyl group, pyrenediyl group, pentacenediyl group, perylenediyl group, fluorenediyl group, oxadiazolediyl group, thiadiazole Diyl group, oxazolediyl group, thiazolediyl group, thiophenediyl group, bithiophenediyl group, terthiophenediyl group, quaterthiophenediyl group, pyrrolediyl group, frangylyl group, selenophenediyl group, pyridinediyl group, pyrazinediyl group, Pyrimidinediyl group, triazinediyl group, benzothiophenediyl group, benzopyrrolediyl group, benzofur
- alkyl group, aryl group and heteroaryl group represented by R 3 are the same as the definitions and specific examples of the alkyl group, aryl group and heteroaryl group represented by R 1 described above.
- Ar 1 is preferably a divalent aromatic group from the viewpoint of improving the field effect mobility of the polymer compound, more preferably a divalent aromatic group containing an aromatic ring containing a hetero atom, Structural units represented by 3-1) to formula (3-15) are more preferable.
- each R 4 independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, or an alkylthio group which may have a substituent.
- R 5 each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group or a heteroaryl group.
- Definitions and specific examples of the alkyl group, alkoxy group, alkylthio group, aryl group, heteroaryl group and halogen atom represented by R 4 include the alkyl group, alkoxy group, alkylthio group, aryl represented by R 1 described above.
- the definition and specific examples of the group, heteroaryl group and halogen atom are the same.
- the definitions and specific examples of the alkyl group, aryl group and heteroaryl group represented by R 5 are the same as the definitions and specific examples of the alkyl group, aryl group and heteroaryl group represented by R 1 described above.
- Examples of the polymer compound containing two or more second structural units include polymer compounds containing the structural units represented by the formulas (4-1) to (4-15).
- R b each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, or an alkylthio group which may have a substituent. Represents an aryl group, a heteroaryl group or a halogen atom.
- alkyl group, alkoxy group, alkylthio group, aryl group, and heteroaryl group represented by R b are as follows: the alkyl group, alkoxy group, alkylthio group, aryl group, and hetero group represented by R 1 described above.
- the definition of the aryl group is the same as the specific example.
- a structural unit in which all R 1 and R 2 in the first structural unit are hydrogen atoms has a structure that is likely to be ⁇ -stacked.
- a structure that is easily ⁇ -stacked is preferable from the viewpoint of improving the field-effect mobility.
- a polymer compound composed only of structural units in which all R 1 and R 2 in the first structural unit are hydrogen atoms has low solubility in a solvent, and thus an organic thin film is produced when an organic semiconductor is produced. Becomes very difficult.
- the second structural unit has at least one alkyl group, alkoxy group, or alkylthio group so that the polymer compound can be easily dissolved in the solvent. It is preferable to contain a group. It is presumed that a polymer compound including a structure that is easily ⁇ -stacked and a structure that improves solubility in a solvent can easily produce an organic thin film and has high field-effect mobility.
- the polymer compound of the present invention may contain a structural unit other than the first structural unit and the second structural unit (hereinafter sometimes referred to as “other structural unit”). Other structural units may be contained alone or in combination of two or more in the polymer compound.
- R e each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group, a heteroaryl group or a halogen atom.
- the definitions and specific examples of the alkyl group, aryl group and heteroaryl group represented by R e are the same as the definitions and specific examples of the alkyl group, aryl group and heteroaryl group represented by R 1 described above.
- the polymer compound of the present invention is preferably a conjugated polymer compound from the viewpoint of improving the field effect mobility of the polymer compound.
- the polymer compound of the present invention When the polymer compound of the present invention is composed of the first structural unit, the second structural unit, and another structural unit, from the viewpoint of increasing the carrier mobility of the polymer compound, the polymer compound has a total of structural units.
- the total of the first structural unit and the second structural unit is preferably 50 mol% or more, and more preferably 70 mol% or more.
- polymer compound of the present invention examples include polymer compounds represented by formulas (5-1) to (5-15) including a first structural unit and a second structural unit.
- R C each independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, an alkylthio group which may have a substituent, An aryl group, a heteroaryl group or a halogen atom is represented.
- R d each independently represents a hydrogen atom, an alkyl group which may have a substituent, an aryl group or a heteroaryl group.
- n represents an integer of 5 or more.
- alkyl group, alkoxy group, alkylthio group, aryl group and heteroaryl group represented by R C are as follows: the alkyl group, alkoxy group, alkylthio group, aryl group and hetero group represented by R 1 described above.
- the definition of the aryl group is the same as the specific example.
- alkyl group, aryl group and heteroaryl group represented by R d are the same as the definitions and specific examples of the alkyl group, aryl group and heteroaryl group represented by R 1 described above.
- the molecular chain terminal is preferably a stable group such as an aryl group or a heteroaryl group.
- the polymer compound of the present invention may be any type of copolymer, such as a block copolymer, a random copolymer, an alternating copolymer, or a graft copolymer.
- the number average molecular weight (Mn) in terms of polystyrene measured by gel permeation chromatography (hereinafter referred to as “GPC”) of the polymer compound of the present invention is usually 1 ⁇ 10 3 to 1 ⁇ 10 8 . From the viewpoint of forming a good thin film during thin film production, the number average molecular weight is preferably 2 ⁇ 10 3 or more. The number average molecular weight is preferably 1 ⁇ 10 6 or less from the viewpoint of increasing the solubility in a solvent and facilitating the production of a thin film.
- the polymer compound of the present invention comprises a monomer that is a raw material of the first structural unit, a monomer that is a raw material of the second structural unit, and a monomer that is a raw material of another structural unit if necessary. Manufactured by copolymerization.
- the monomer that is a raw material of the first structural unit is, for example, a compound in which an alkyl metal group is bonded to the bond of the structural unit represented by the formula (1).
- This monomer has the formula
- the alkyl metalation of the compound represented by the formula (6) may be carried out by dissolving the compound represented by the formula (6) in a suitable solvent and reacting the alkyl metal reagent in the presence of a base.
- a suitable solvent diethyl ether, tetrahydrofuran (THF), hexane, heptane, toluene or the like can be used, and as the base, n-butyllithium, sec-butyllithium, tert-butyllithium, lithium diisopropylamide or the like can be used.
- THF tetrahydrofuran
- the monomer used as the raw material of the second structural unit is a compound in which a halogen atom is bonded to the bond of the structural unit represented by the above formula (2).
- the compound in which the halogen atom is bonded to the bond of the structural unit represented by the formula (2) is produced by halogenating the compound in which the hydrogen atom is bonded to the bond of the structural unit represented by the formula (2). .
- Halogenation of a compound in which a hydrogen atom is bonded to the bond of the structural unit represented by the formula (2) is performed by using a compound in which a hydrogen atom is bonded to the bond of the structural unit represented by the formula (2) in an appropriate solvent. It can be dissolved and reacted with a halogenating agent.
- a halogenating agent As the solvent, chloroform, tetrahydrofuran, dimethylformamide, acetic acid and the like can be used.
- halogenating agent N-bromosuccinimide (NBS), bromine, N-iodosuccinimide (NIS), N-chlorosuccinimide (NCS) Etc. can be used.
- the monomer used as the raw material for the other structural unit is, for example, a compound in which an alkyl metal group or a halogen atom is bonded to the bond of the group exemplified as the other structural unit.
- These compounds are produced by alkylating or halogenating a compound in which a hydrogen atom is bonded to a bond of a group exemplified as another structural unit using the same method as described above.
- the alkyl metal group refers to a monovalent group having a structure in which an alkyl group is bonded to a metal atom.
- the alkyl metal group include a stannyl group substituted with an alkyl group and a boryl group substituted with an alkyl group.
- the reaction amount of the monomer that is the raw material of the first structural unit and the monomer that is the raw material of the second structural unit is 30/70 to 70/30, preferably 35/65 to 65 in molar ratio. / 35, more preferably 40/60 to 60/40.
- the ratio of the reaction amount of both monomers is less than 40 mol%, the molecular weight of the polymer compound is low, and the field effect mobility may be low.
- the amount used is 50 mol% or less, preferably 30 mol%, based on the total amount of monomers as described above.
- the amount is as follows.
- Solvents include aromatic hydrocarbon solvents such as toluene and benzene, ether solvents such as tetrahydrofuran and anisole, 1-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, acetonitrile, etc.
- a transition metal complex includes Pd 2 (dba) 3 (where dba represents trans, trans-dibenzylideneacetone), Pd (dba) 2 , tetrakis (Triphenylphosphine) palladium, palladium (II) acetate, dichlorobis (triphenylphosphine) palladium, bis (1,5-cyclooctadiene) nickel (0) and the like can be used.
- the phosphine compound tri-n -Butylphosphine, tri-ter -Butylphosphine, tricyclohexylphosphine, triphenylphosphine, tristolylphosphine (the tolyl group in the compound may be an orthotolyl group, a metatolyl group or a paratolyl group), tris (methoxyphenyl) phosphine (a methoxyphenyl group in the compound) May be an orthomethoxyphenyl group, a metamethoxyphenyl group or a paramethoxyphenyl group), (2-biphenylyl) di-tert-butylphosphine, 1,2-bis (diphenylphosphino) ethane, 1,3- Bis (diphenylphosphino) propane, 1,1′-bis (diphenylphosphino) ferrocene, etc.
- the reaction temperature is adjusted to 0 to 200 ° C. in consideration of the stability of the compound and the reaction time. In this case, the reaction time is 30 minutes to 100 hours.
- the polymer compound of the present invention may be produced by a second method different from the first method.
- the monomer used as the raw material of the first structural unit is a compound in which a halogen atom is bonded to the bond of the structural unit represented by the formula (1).
- This monomer is produced by halogenating the compound represented by the above formula (6).
- Halogenation of the compound represented by the formula (6) uses the compound represented by the formula (6) instead of the compound in which a hydrogen atom is bonded to the bond of the structural unit represented by the formula (2).
- the reaction can be carried out in substantially the same manner as in the reaction of halogenating a compound in which a hydrogen atom is bonded to the bond of the structural unit represented by the above formula (2).
- the monomer used as the raw material of the second structural unit is an alkyl metal group such as a trialkylstannyl group or a dihydroxyboryl group (—B (OH 2 ), or a compound in which a group obtained by removing a hydroxyl group from a boric acid diester is bonded.
- alkyl metal group such as a trialkylstannyl group or a dihydroxyboryl group (—B (OH 2 )
- B (OH 2 ) dihydroxyboryl group
- a compound in which an alkyl metal group such as a trialkylstannyl group, a dihydroxyboryl group, or a group obtained by removing a hydroxyl group from a boric acid diester is bonded to a bond of a structural unit represented by the formula (2) is represented by the formula (2) It is produced by boron oxidation of the structural unit represented by
- the alkyl metalation of the compound in which a hydrogen atom is bonded to the bond of the structural unit represented by the formula (2) is performed by bonding the structural unit represented by the formula (2) instead of the compound represented by the formula (6).
- the reaction can be carried out in substantially the same manner as the alkyl metalation reaction of the compound represented by the above formula (6) except that a compound having a hydrogen atom bonded to the hand is used.
- Dihydroxyborylation or boric acid diesterification of a compound in which a hydrogen atom is bonded to the bond of the structural unit represented by formula (2) is performed by bonding a hydrogen atom to the bond of the structural unit represented by formula (2).
- the compound may be dissolved in a suitable solvent and reacted with trialkylborate in the presence of a base.
- diethyl ether diethyl ether, tetrahydrofuran (THF), hexane, heptane, toluene or the like
- base n-butyllithium, sec-butyllithium, tert-butyllithium, lithium diisopropylamide or the like
- trialkyl borate trimethyl borate, triisopropyl borate, 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane and the like can be used.
- the monomer used as the raw material for the other structural unit is, for example, a group obtained by removing a hydroxyl group from a halogen atom, an alkali metal group, a dihydroxyboryl group, or a boric acid diester at the bond of the group exemplified as the other structural unit. It is a bound compound.
- These compounds are obtained by halogenating, alkylating, dihydroxyborating, or boric acid diester a compound in which a hydrogen atom is bonded to a bond of a group exemplified as another structural unit using the same method as described above. Manufactured by.
- a compound in which a halogen atom is bonded to the bond of the structural unit represented by the formula (1), an alkali metal group, a dihydroxyboryl group, or a boric acid diester to the bond of the structural unit represented by the formula (2) A compound in which a group from which a hydroxyl group has been removed is bonded, and, if necessary, a group in which a hydroxyl group is removed from a halogen atom, an alkali metal group, a dihydroxyboryl group, or a boric acid diester as a bond of a group exemplified as another structural unit
- the compound to which is bonded is dissolved in an appropriate solvent and heated in the presence of a transition metal complex and, if necessary, a phosphine compound and a base to react with each other, whereby the polymer compound of the present invention is obtained.
- Solvents include aromatic hydrocarbon solvents such as toluene and benzene, ether solvents such as tetrahydrofuran and anisole, 1-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, acetonitrile, etc.
- a transition metal complex includes Pd 2 (dba) 3 (where dba represents trans, trans-dibenzylideneacetone), Pd (dba) 2 , tetrakis (Triphenylphosphine) palladium, palladium (II) acetate, dichlorobis (triphenylphosphine) palladium, bis (1,5-cyclooctadiene) nickel (0) and the like can be used.
- phosphine compound tri-n -Butylphosphine, tri-ter -Butylphosphine, tricyclohexylphosphine, triphenylphosphine, tristolylphosphine (the tolyl group in the compound may be an orthotolyl group, a metatolyl group or a paratolyl group), tris (methoxyphenyl) phosphine (a methoxyphenyl group in the compound) May be an orthomethoxyphenyl group, a metamethoxyphenyl group or a paramethoxyphenyl group), (2-biphenylyl) di-tert-butylphosphine, 1,2-bis (diphenylphosphino) ethane, 1,3- Bis (diphenylphosphino) propane, 1,1′-bis (diphenylphosphino) ferrocene and the like can be used, and as the base, sodium carbonate, potassium carbonate,
- purification operations such as reprecipitation, Soxhlet washing, extraction, silica gel column purification, gel permeation chromatography purification and the like are performed to obtain the polymer compound of the present invention.
- the polymer compound of the present invention can also be produced using a compound represented by the formula (8).
- each R 6 independently represents a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, or an alkylthio group which may have a substituent. Represents an aryl group, a heteroaryl group or a halogen atom.
- E, R 1 and R 2 represent the same meaning as described above.
- R 6 Definitions and specific examples of the alkyl group, aryl group, heteroaryl group and halogen atom represented by R 6 include definitions and specific examples of the alkyl group, aryl group, heteroaryl group and halogen atom represented by the aforementioned R 1. Is the same. R 6 is preferably a hydrogen atom or a halogen atom.
- the compound represented by the formula (8) can be produced by a method including a step of reacting the compound represented by the formula (7) with a metal hydride.
- Examples of the metal hydride used in the production method of the present invention include lithium aluminum hydride, sodium borohydride, diisobutylaluminum hydride, lithium hydride, triphenyltin hydride, tributyltin hydride, and triethyltin hydride. , Trimethylsilane, phenylsilane, diphenylsilane, polymethylhydroxan, and trichlorosilane.
- the reaction between the compound represented by the formula (7) and the metal hydride may be performed in the presence of Lewis acid.
- Lewis acid include boron trifluoride, aluminum chloride, tin (IV) chloride, silicon (IV) chloride, iron (III) chloride, titanium chloride, zinc chloride and a mixture of these acids.
- the reaction between the compound represented by the formula (7) and the metal hydride may be performed in an inert gas atmosphere such as nitrogen gas or argon gas, or in the presence of a solvent.
- the reaction temperature is not particularly limited, but it is preferably performed at a temperature within the range of ⁇ 80 ° C. to the boiling point of the solvent.
- Examples of the solvent used in the reaction of the compound represented by the formula (7) with the metal hydride include saturated hydrocarbons such as pentane, hexane, heptane, octane, and cyclohexane, and benzene, toluene, ethylbenzene, and xylene.
- Examples include saturated hydrocarbons, dimethyl ether, diethyl ether, methyl-tert-butyl ether, tetrahydrofuran, tetrahydropyran, and dioxane. These solvents may be used alone or in combination.
- the product After the reaction (for example, after stopping the reaction by adding water), the product is extracted with an organic solvent, and subjected to usual post-treatment such as distilling off the solvent, thereby being represented by the formula (8).
- a mixture containing the compound can be obtained.
- the mixture may be purified by chromatographic fractionation or recrystallization.
- the polymer compound of the present invention Since the polymer compound of the present invention has high field effect mobility, it can be used as an organic semiconductor material, for example, in an organic layer of an organic semiconductor element.
- the organic semiconductor element include an organic transistor, an organic solar battery, and an organic electroluminescence element.
- the polymer compound of the present invention is particularly useful as a charge transport material for organic transistors.
- the organic semiconductor material may contain one kind of the polymer compound of the present invention alone, or may contain two or more kinds. Moreover, in order to improve carrier transport property, the organic-semiconductor material may further contain the low molecular compound or polymer compound which has carrier transport property in addition to the polymer compound of this invention.
- the organic semiconductor material contains a component other than the polymer compound of the present invention, the polymer compound of the present invention is preferably contained in an amount of 30% by weight or more, more preferably 50% by weight or more. When the content of the polymer compound of the present invention is less than 30% by weight, it may be difficult to form a thin film or to obtain good charge mobility.
- Compounds having carrier transport properties include arylamine derivatives, stilbene derivatives, oligothiophenes and derivatives thereof, low molecular compounds such as oxadiazole derivatives, fullerenes and derivatives thereof, polyvinylcarbazole and derivatives thereof, polyaniline and derivatives thereof, polythiophene And polymer derivatives thereof, such as polypyrrole and derivatives thereof, polyphenylene vinylene and derivatives thereof, polythienylene vinylene and derivatives thereof, and polyfluorene and derivatives thereof.
- the organic semiconductor material may contain a polymer compound material as a polymer binder in order to improve its characteristics.
- a polymer binder those that do not excessively lower the carrier transportability are preferable.
- polymer binders examples include poly (N-vinylcarbazole), polyaniline and derivatives thereof, polythiophene and derivatives thereof, poly (p-phenylene vinylene) and derivatives thereof, poly (2,5-thienylene vinylene) and derivatives thereof , Polycarbonate, polyacrylate, polymethyl acrylate, polymethyl methacrylate, polystyrene, polyvinyl chloride, and polysiloxane.
- Organic transistor has a source electrode and a drain electrode, a current path between these electrodes, an active layer containing the polymer compound of the present invention, and a gate electrode that controls the amount of current passing through the current path The thing which has is mentioned.
- Examples of the organic transistor having such a configuration include a field effect organic transistor and a static induction organic transistor.
- a field effect organic transistor usually has a source electrode and a drain electrode, a current path between these electrodes, an active layer containing the polymer compound of the present invention, and a gate electrode that controls the amount of current passing through the current path.
- the organic transistor having an active layer and an insulating layer disposed between the gate electrode.
- an organic transistor in which a source electrode and a drain electrode are provided in contact with an active layer and a gate electrode is provided with an insulating layer in contact with the active layer interposed therebetween is preferable.
- the electrostatic induction organic transistor usually has a source electrode and a drain electrode, a current path between these electrodes, an active layer containing the polymer compound of the present invention, and a gate electrode that controls the amount of current passing through the current path And the gate electrode is provided in the active layer.
- a source electrode, a drain electrode, and the gate electrode are provided in contact with the active layer is preferable.
- the gate electrode may be a structure that can form a current path flowing from the source electrode to the drain electrode and that can control the amount of current flowing through the current path with a voltage applied to the gate electrode, and is, for example, a comb electrode.
- FIG. 1 is a schematic cross-sectional view showing an example of an organic transistor (field-effect organic transistor) of the present invention.
- An organic transistor 100 shown in FIG. 1 includes a substrate 1, a source electrode 5 and a drain electrode 6 formed on the substrate 1 at a predetermined interval, and a source electrode 5 and a drain electrode 6 so as to cover the substrate 1.
- the gate electrode 4 is provided.
- FIG. 2 is a schematic cross-sectional view showing another example of the organic transistor (field effect organic transistor) of the present invention.
- An organic transistor 110 shown in FIG. 2 includes a substrate 1, a source electrode 5 formed on the substrate 1, an active layer 2 formed on the substrate 1 so as to cover the source electrode 5, a source electrode 5, and a predetermined electrode
- the drain electrode 6 formed on the active layer 2 with an interval, the insulating layer 3 formed on the active layer 2 and the drain electrode 6, and the insulating layer on the region between the source electrode 5 and the drain electrode 6
- a gate electrode 4 formed on the insulating layer 3 so as to cover 3.
- FIG. 3 is a schematic cross-sectional view showing another example of the organic transistor (field effect type organic transistor) of the present invention.
- the organic transistor 120 shown in FIG. 3 includes a substrate 1, a gate electrode 4 formed on the substrate 1, an insulating layer 3 formed on the substrate 1 so as to cover the gate electrode 4, and the gate electrode 4 at the bottom.
- an active layer 2 formed on the insulating layer 3 so as to cover the surface.
- FIG. 4 is a schematic cross-sectional view showing another example of the organic transistor (field effect organic transistor) of the present invention.
- An organic transistor 130 shown in FIG. 4 includes a substrate 1, a gate electrode 4 formed on the substrate 1, an insulating layer 3 formed on the substrate 1 so as to cover the gate electrode 4, and the gate electrode 4 at the bottom.
- a layer 2 and a drain electrode 6 formed on the insulating layer 3 at a predetermined interval so as to cover a part of the active layer 2 are provided.
- FIG. 5 is a schematic sectional view showing another example of the organic transistor (electrostatic induction type organic transistor) of the present invention.
- the organic transistor 140 shown in FIG. 5 includes a substrate 1, a source electrode 5 formed on the substrate 1, an active layer 2 formed on the source electrode 5, and a plurality of active transistors 2 with a predetermined interval on the active layer 2.
- a drain electrode 6 formed on the active layer 2a.
- FIG. 6 is a schematic cross-sectional view showing another example of the organic transistor (field effect type organic transistor) of the present invention.
- the organic transistor 150 shown in FIG. 6 includes a substrate 1, an active layer 2 formed on the substrate 1, a source electrode 5 and a drain electrode 6 formed on the active layer 2 with a predetermined interval, and a source electrode. 5 and an insulating layer 3 formed on the active layer 2 so as to cover a part of the drain electrode 6, a region of the insulating layer 3 in which the source electrode 5 is formed in the lower portion, and a drain electrode 6 are formed in the lower portion.
- a gate electrode 4 formed on the insulating layer 3 so as to partially cover each region of the insulating layer 3.
- FIG. 7 is a schematic cross-sectional view showing another example of the organic transistor (field-effect organic transistor) of the present invention.
- the organic transistor 160 shown in FIG. 7 includes a substrate 1, a gate electrode 4 formed on the substrate 1, an insulating layer 3 formed on the substrate 1 so as to cover the gate electrode 4, and the gate electrode 4 at the bottom.
- An active layer 2 formed so as to cover the region of the insulating layer 3 formed on the active layer 2, a source electrode 5 formed on the active layer 2 so as to cover a part of the active layer 2, and one of the active layers 2
- a source electrode 5 and a drain electrode 6 formed on the active layer 2 with a predetermined interval are provided so as to cover the portion.
- FIG. 8 is a schematic cross-sectional view showing another example of the organic transistor (field-effect organic transistor) of the present invention.
- An organic transistor 170 shown in FIG. 8 has a gate electrode 4, an insulating layer 3 formed on the gate electrode 4, an active layer 2 formed on the insulating layer 3, and a predetermined interval on the active layer 2.
- the gate electrode 4 also serves as the substrate 1.
- FIG. 9 is a schematic cross-sectional view showing another example of the organic transistor (field effect organic transistor) of the present invention.
- the organic transistor 180 shown in FIG. 9 includes a gate electrode 4, an insulating layer 3 formed on the gate electrode 4, a source electrode 5 and a drain electrode 6 formed on the insulating layer 3 with a predetermined interval,
- the active layer 2 is formed on the insulating layer 3 so as to cover a part of the source electrode 5 and the drain electrode 6.
- the active layer 2 and / or the active layer 2a is composed of a film containing the polymer compound of the present invention, and a current path (channel) between the source electrode 5 and the drain electrode 6 is formed. )
- the gate electrode 4 controls the amount of current passing through the current path (channel) by applying a voltage.
- Such a field effect organic transistor can be produced by a known method, for example, a method described in JP-A-5-110069.
- the electrostatic induction organic transistor can be manufactured by a known method such as the method described in Japanese Patent Application Laid-Open No. 2004-006476.
- the material of the substrate 1 may be any material that does not hinder the characteristics of the organic transistor.
- a glass substrate, a flexible film substrate, or a plastic substrate can be used as the substrate.
- the material of the insulating layer 3 may be any material having high electrical insulation, and SiO x , SiN x , Ta 2 O 5 , polyimide, polyvinyl alcohol, polyvinyl phenol, organic glass, photoresist, and the like can be used. From the viewpoint of lowering the voltage, it is preferable to use a material having a high dielectric constant.
- the surface of the insulating layer 3 is treated with a surface treatment agent such as a silane coupling agent in order to improve the interface characteristics between the insulating layer 3 and the active layer 2. It is also possible to form the active layer 2 after the modification.
- silane coupling agents include alkylchlorosilanes (octyltrichlorosilane (OTS), octadecyltrichlorosilane (ODTS), phenylethyltrichlorosilane, etc.), alkylalkoxysilanes, fluorinated alkylchlorosilanes, fluorinated alkylalkoxy.
- alkylalkoxysilanes fluorinated alkylchlorosilanes, fluorinated alkylalkoxy.
- silylamine compounds such as silanes and hexamethyldisilazane (HMDS).
- the surface of the insulating layer may be subjected to ozone UV treatment or O 2 plasma treatment before treatment with the surface treatment agent.
- the surface energy of the silicon oxide film used as the insulating layer can be controlled. Further, the surface treatment improves the orientation of the film constituting the active layer on the insulating layer, and high charge transportability (mobility) can be obtained.
- the gate electrode 4 includes metals such as gold, platinum, silver, copper, chromium, palladium, aluminum, indium, molybdenum, low-resistance polysilicon, low-resistance amorphous silicon, tin oxide, indium oxide, indium / tin oxide.
- a material such as (ITO) can be used. These materials may be used alone or in combination of two or more.
- a highly doped silicon substrate can be used as the gate electrode 4.
- a highly doped silicon substrate has not only the performance as a gate electrode but also the performance as a substrate. When the gate electrode 4 having such a performance as a substrate is used, the substrate 1 may be omitted in the organic transistor in which the substrate 1 and the gate electrode 4 are in contact with each other.
- the source electrode 5 and the drain electrode 6 are preferably made of a low resistance material, and particularly preferably made of gold, platinum, silver, copper, chromium, palladium, aluminum, indium, molybdenum or the like. These materials may be used alone or in combination of two or more.
- a layer composed of another compound may be interposed between the source electrode 5 and the drain electrode 6 and the active layer 2.
- layers include low molecular compounds having electron transport properties, low molecular compounds having hole transport properties, alkali metals, alkaline earth metals, rare earth metals, complexes of these metals with organic compounds, iodine, bromine, Halogens such as chlorine and iodine chloride, sulfur oxide compounds such as sulfuric acid, sulfuric anhydride, sulfur dioxide and sulfate, nitric oxide compounds such as nitric acid, nitrogen dioxide and nitrate, halogenated compounds such as perchloric acid and hypochlorous acid, Examples thereof include layers made of aromatic thiol compounds such as alkyl thiol compounds, aromatic thiols, and fluorinated alkyl aromatic thiols.
- the organic transistor after manufacturing the organic transistor as described above, it is preferable to form a protective film on the organic transistor in order to protect the element. Thereby, an organic transistor is interrupted
- Examples of the method for forming the protective film include a method of covering the organic transistor with a UV curable resin, a thermosetting resin, an inorganic SiON x film, or the like.
- a protective film after the organic transistor is manufactured without exposing the organic transistor to the atmosphere (for example, in a dry nitrogen atmosphere or in a vacuum).
- An organic field effect transistor which is a kind of organic transistor configured as described above, can be applied as a pixel drive switching element of an active matrix drive type liquid crystal display or an organic electroluminescence display. And since the organic field effect transistor of embodiment mentioned above is equipped with the active compound which contains the high molecular compound of this invention as an active layer, and the charge transport property improved by it, the field effect mobility is provided. Is expensive. Therefore, it is useful for manufacturing a display having a sufficient response speed.
- NMR analysis The NMR measurement was performed by dissolving the compound in deuterated chloroform or deuterated acetone and using an NMR apparatus (manufactured by Varian, INOVA300).
- Mass spectrometry Mass spectrometry was determined using a mass spectrometer (AccuTOF TLC JMS-T100TD, manufactured by JEOL Ltd.).
- the number average molecular weight and the weight average molecular weight of the polymer compound were determined using gel permeation chromatography (GPC, manufactured by Waters, trade name: Alliance GPC 2000).
- GPC gel permeation chromatography
- the polymer compound to be measured was dissolved in orthodichlorobenzene and injected into GPC.
- Orthodichlorobenzene was used for the mobile phase of GPC.
- the column used was TSKgel GMHHR-H (S) HT (two linked, manufactured by Tosoh Corporation).
- a UV detector was used as the detector.
- the toluene solution containing the reaction product was washed with an aqueous hydrochloric acid solution and then washed with water. Thereafter, the solvent in the toluene solution was evaporated by an evaporator.
- the obtained solid was purified by a silica gel column using hexane as a developing solvent, and the separated compound 2 was dried.
- the yield of Compound 2 was 5.5 g, and the yield was 32%.
- the toluene solution was washed with an aqueous hydrochloric acid solution and then washed with water. Thereafter, the solvent in the toluene solution was evaporated by an evaporator. The obtained solid was purified with a silica gel column using hexane as a developing solvent, and the separated compound 4 was dried. The yield of compound 4 was 1.4 g, and the yield was 57%.
- the hexane solution was washed with an aqueous hydrochloric acid solution and then washed with water.
- the solvent in the hexane solution was evaporated by an evaporator.
- the obtained solid was purified with a silica gel column using hexane as a developing solvent, and the separated compound 6 was dried.
- the yield of compound 6 was 0.80 g, and the yield was 23%.
- the precipitate was collected by filtration, and the filtrate was washed with methanol for 4 hours and with acetone for 4 hours by a Soxhlet washer.
- the washed solid was dissolved in toluene, and 1.0 g of sodium N, N-diethyldithiocarbamate trihydrate and water were added to the obtained toluene solution and refluxed for 3 hours.
- the solution after reflux was poured into methanol, and the precipitate was collected by filtration.
- the precipitate was dissolved in toluene and purified with a silica gel column using toluene as a developing solvent.
- the obtained toluene solution was poured into methanol, and the precipitate was collected by filtration to obtain 0.10 g of polymer compound A.
- the number average molecular weight in terms of polystyrene of the polymer compound A was 1.9 ⁇ 10 4
- the weight average molecular weight in terms of polystyrene was 3.4 ⁇ 10 4 .
- the purified toluene solution was added dropwise to methanol, and the precipitate was filtered to obtain 0.10 g of polymer compound B.
- the number average molecular weight of polystyrene conversion of the high molecular compound B was 9.8 * 10 ⁇ 3 >, and the weight average molecular weight was 2.2 * 10 ⁇ 4 >.
- the washed solid was dissolved in toluene, and 1.0 g of sodium N, N-diethyldithiocarbamate trihydrate and water were added to the obtained toluene solution and refluxed for 3 hours.
- the solution after reflux was poured into methanol, and the precipitate was collected by filtration.
- the precipitate was dissolved in toluene and purified with a silica gel column using toluene as a developing solvent.
- the obtained toluene solution was poured into methanol, and the precipitate was collected by filtration to obtain 0.10 g of polymer compound C.
- the number average molecular weight in terms of polystyrene of the polymer compound C was 2.0 ⁇ 10 4
- the weight average molecular weight in terms of polystyrene was 6.0 ⁇ 10 4 .
- the washed solid was dissolved in toluene, and 1.0 g of sodium N, N-diethyldithiocarbamate trihydrate and water were added to the obtained toluene solution and refluxed for 3 hours.
- the solution after reflux was poured into methanol, and the precipitate was collected by filtration.
- the precipitate was dissolved in toluene and purified with a silica gel column using toluene as a developing solvent.
- the obtained toluene solution was poured into methanol, and the precipitate was collected by filtration to obtain 0.10 g of polymer compound D.
- the number average molecular weight of polystyrene conversion of the high molecular compound D was 1.6 * 10 ⁇ 4 >, and the weight average molecular weight of polystyrene conversion was 3.4 * 10 ⁇ 4 >.
- the washed solid was dissolved in toluene, and 1.0 g of sodium N, N-diethyldithiocarbamate trihydrate and water were added to the obtained toluene solution and refluxed for 3 hours.
- the solution after reflux was poured into methanol, and the precipitate was collected by filtration.
- the precipitate was dissolved in toluene and purified with a silica gel column using toluene as a developing solvent.
- the obtained toluene solution was poured into methanol, and the precipitate was collected by filtration to obtain 0.10 g of a polymer compound E.
- the number average molecular weight of polystyrene conversion of the high molecular compound E was 1.6 * 10 ⁇ 4 >, and the weight average molecular weight of polystyrene conversion was 3.9 * 10 ⁇ 4 >.
- Example 6 (Production and Evaluation of Organic Transistor 1) An organic transistor 1 having the structure shown in FIG. 9 was produced using a solution containing the polymer compound A. The surface of the heavily doped n-type silicon substrate serving as the gate electrode was thermally oxidized to form a silicon oxide film (hereinafter referred to as “thermal oxide film”). The thermal oxide film functions as an insulating layer. Next, a source electrode and a drain electrode were formed on the thermal oxide film by a photolithography process. The source electrode and the drain electrode had a chromium (Cr) layer and a gold (Au) layer from the thermal oxide film side, and had a channel length of 20 ⁇ m and a channel width of 2 mm.
- Cr chromium
- Au gold
- the substrate on which the thermal oxide film, the source electrode, and the drain electrode thus obtained were ultrasonically cleaned with acetone, and UV ozone treatment was performed with an ozone UV cleaner. Thereafter, the surface of the thermal oxide film was modified with ⁇ -phenethyltrichlorosilane, and the surfaces of the source electrode and the drain electrode were modified with pentafluorobenzenethiol. Next, the surface-treated thermal oxide film, the source electrode, and the drain electrode are spin-coated with an orthodichlorobenzene solution of 0.5% by weight of polymer compound A at a rotational speed of 1000 rpm, and an organic semiconductor layer (active layer) ) Was formed. Thereafter, the organic semiconductor layer was heated at 170 ° C. for 30 minutes to manufacture the organic transistor 1.
- the transistor characteristics were measured by changing the gate voltage Vg and the source-drain voltage Vsd of the organic transistor 1 obtained.
- the field effect mobility was 6.5 ⁇ 10 ⁇ 1 cm 2 / Vs.
- Example 7 (Production and Evaluation of Organic Transistor 2) Organic transistor 2 was produced in the same manner as in Example 6 except that polymer compound C was used instead of polymer compound A.
- the transistor characteristics were measured by changing the gate voltage Vg and the source-drain voltage Vsd of the organic transistor 2 obtained.
- the field effect mobility was 7.6 ⁇ 10 ⁇ 3 cm 2 / Vs.
- the obtained organic layer was washed twice with saturated aqueous ammonium chloride solution and once with saturated brine, dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure.
- the obtained residue was purified by silica gel column chromatography to obtain compound 11.
- the yield of compound 11 was 512 mg, and the yield was 34%.
- the obtained organic layer was washed twice with saturated brine, dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure.
- the obtained residue was purified by silica gel column chromatography using hexane as a mobile phase to obtain Compound 13 as a yellow oil.
- the yield of compound 13 was 2.75 g, and the yield was 98%.
- the obtained residue is purified by silica gel column chromatography using hexane as a mobile phase, and then purified by recycle preparative gel permeation chromatography (manufactured by Japan Analytical Industry: JAIGEL-1H, 2H) to give compound 14 as a pale yellow solid. Got as. The yield of compound 14 was 0.66 g, and the yield was 89%.
- the separated organic layer was added dropwise to 100 mL of 100 mL of acetone to obtain a precipitate.
- the obtained precipitate was purified by a silica gel column using o-dichlorobenzene as a developing solvent, and then the obtained o-dichlorobenzene solution was poured into methanol to precipitate a solid.
- the obtained solid was filtered and dried to obtain 27 mg of polymer compound F.
- the number average molecular weight of polystyrene conversion of the high molecular compound F was 3.0 * 10 ⁇ 4 >, and the weight average molecular weight of polystyrene conversion was 2.0 * 10 ⁇ 5 >.
- the separated organic layer was dropped into 100 mL of acetone to obtain a precipitate.
- the obtained precipitate was purified with a silica gel column using o-dichlorobenzene as a developing solvent, and then the obtained o-dichlorobenzene solution was poured into methanol to precipitate a solid, and the obtained solid was filtered. .
- the obtained solid was washed with acetone for 3 hours, methanol for 4 hours, acetone for 4 hours and hexane for 4 hours and dried to obtain 69 mg of polymer compound G.
- the yield of the polymer compound G was 59%.
- the polymer compound G had a polystyrene-equivalent number average molecular weight of 2.9 ⁇ 10 4 and a polystyrene-equivalent weight average molecular weight of 3.0 ⁇ 10 5 .
- the obtained precipitate was purified with a silica gel column using o-dichlorobenzene as a developing solvent, and then the obtained o-dichlorobenzene solution was poured into 80 mL of methanol to precipitate a solid. Filtered. Using a Soxhlet extractor, the obtained solid was washed with acetone for 3 hours and dried to obtain 47.8 mg of polymer compound H.
- the obtained polymer compound H had a polystyrene-equivalent number average molecular weight of 1.1 ⁇ 10 4 and a polystyrene-equivalent weight average molecular weight of 2.4 ⁇ 10 4 .
- the separated organic layer was dropped into 100 mL of acetone to obtain a precipitate.
- the obtained precipitate was purified with a silica gel column using o-dichlorobenzene as a developing solvent, and then the obtained o-dichlorobenzene solution was poured into 100 mL of methanol to precipitate a solid. Filtered.
- the obtained solid was washed with acetone for 3 hours using a Soxhlet extractor and dried to obtain 81 mg of polymer compound I.
- the obtained polymer compound I had a polystyrene-equivalent number average molecular weight of 3.7 ⁇ 10 4 and a polystyrene-equivalent weight average molecular weight of 2.2 ⁇ 10 5 .
- Example 13 (Production and Evaluation of Organic Transistor 3) Organic transistor 3 was produced in the same manner as in Example 6 except that polymer compound F was used instead of polymer compound A.
- the transistor characteristics were measured by changing the gate voltage Vg and the source-drain voltage Vsd of the organic transistor 3 obtained.
- the field effect mobility was 0.13 cm 2 / Vs.
- Example 14 (Production and Evaluation of Organic Transistor 4) An organic transistor 4 was produced in the same manner as in Example 6 except that the polymer compound G was used instead of the polymer compound A.
- the gate voltage Vg and source-drain voltage Vsd of the obtained organic transistor 4 were changed, and transistor characteristics were measured.
- the field effect mobility was 0.024 cm 2 / Vs.
- Example 15 (Production and Evaluation of Organic Transistor 5) An organic transistor 5 was produced in the same manner as in Example 6 except that the polymer compound H was used instead of the polymer compound A.
- the gate voltage Vg and source-drain voltage Vsd of the obtained organic transistor 5 were changed, and transistor characteristics were measured.
- the field effect mobility was 0.0051 cm 2 / Vs.
- Example 16 (Production and Evaluation of Organic Transistor 6) Organic transistor 6 was produced in the same manner as in Example 6 except that polymer compound I was used instead of polymer compound A.
- the gate voltage Vg and source-drain voltage Vsd of the obtained organic transistor 6 were changed, and transistor characteristics were measured.
- the field effect mobility was 0.027 cm 2 / Vs.
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Abstract
Description
で表される構造単位と、式(1)で表される構造単位とは異なる式
で表される構造単位とを含む高分子化合物を提供する。
(第1構造単位)
本発明の高分子化合物は、式(1)で表される構造単位(以下、「第1構造単位」という場合がある。)を含む。第1構造単位は、高分子化合物中に一種のみ含まれていても二種以上含まれていてもよい。
アルキル基の具体例としては、メチル基、エチル基、n-プロピル基、n-ブチル基、n-ヘキシル基、n-オクチル基、n-ドデシル基、n-オクタデシル基等の直鎖アルキル基、イソプロピル基、イソブチル基、sec-ブチル基、tert-ブチル基、2-エチルヘキシル基、3,7-ジメチルオクチル基等の分岐アルキル基、シクロペンチル基、シクロヘキシル基等のシクロアルキル基が挙げられる。
アルキル基は置換基を有していてもよく、アルキル基が有していてもよい置換基としては、アルコキシ基、アリール基、ハロゲン原子等が挙げられる。置換基を有しているアルキル基の具体例としては、メトキシエチル基、ベンジル基、トリフルオロメチル基、パーフルオロヘキシル基等が挙げられる。
アルコキシ基の具体例としては、n-ブチルオキシ基、n-ヘキシルオキシ基、2-エチルヘキシルオキシ基、3,7-ジメチルオクチルオキシ基、n-ドデシルオキシ基等が挙げられる。
アルコキシ基が有していてもよい置換基としては、アリール基、ハロゲン原子等が挙げられる。
アルコキシ基の中でも、n-ブチルオキシ基、n-ヘキシルオキシ基、n-ドデシルオキシ基等の直鎖アルキルオキシ基が好ましい。
アルキルチオ基の具体例としては、n-ブチルチオ基、n-ヘキシルチオ基、2-エチルヘキシルチオ基、3,7-ジメチルオクチルチオ基、n-ドデシルチオ基等が挙げられる。
アルキルチオ基が有していてもよい置換基としては、アリール基、ハロゲン原子等が挙げられる。
アルキルチオ基の中でも、n-ブチルチオ基、n-ヘキシルチオ基、n-ドデシルチオ基等の直鎖アルキルチオ基が好ましい。
芳香族炭化水素化合物が有していてもよい置換基としては、アルコキシ基、アルキルチオ基、ヘテロアリール基、ハロゲン原子等が挙げられる。これらの基を含むアリール基としては、3,5-ジメトキシフェニル基、ペンタフルオロフェニル基等が挙げられる。芳香族炭化水素化合物が置換基を有する場合、置換基としてはアルキル基が好ましい。
複素環式化合物が有していてもよい置換基としては、アルキル基、アルコキシ基、アルキルチオ基、アリール基、ハロゲン原子等が挙げられる。これらの基を含むヘテロアリール基としては、5-オクチル-2-チエニル基、5-フェニル-2-フリル基等が挙げられる。複素環式化合物が置換基を有する場合、置換基としてはアルキル基が好ましい。
本発明の高分子化合物は、式(2)で表される構造単位(以下、「第2構造単位」という場合がある。)を含む。第2構造単位は、高分子化合物中に一種のみ含まれていても二種以上含まれていてもよい。
第1構造単位中の全てのR1及びR2が水素原子である場合、高分子化合物が溶媒に溶解しやすくするために、第2構造単位は、少なくとも1個のアルキル基、アルコキシ基又はアルキルチオ基を含有することが好ましい。
πスタックしやすい構造と、溶媒に対する溶解性を向上させる構造とを含む高分子化合物は、有機薄膜を容易の作製することができ、高い電界効果移動度を有することが推測される。
本発明の高分子化合物は、第1構造単位、第2構造単位以外の構造単位(以下、「他の構造単位」という場合がある。)を含んでいてもよい。他の構造単位は、高分子化合物中に一種のみ含まれていても二種以上含まれていてもよい。
Reで表される、アルキル基、アリール基及びヘテロアリール基の定義、具体例は、前述のR1で表されるアルキル基、アリール基及びヘテロアリール基の定義、具体例と同じである。
本発明の高分子化合物は、高分子化合物の電界効果移動度を向上させる観点からは、共役高分子化合物であることが好ましい。
薄膜作製時に良好な薄膜を形成する観点から、数平均分子量は2×103以上が好ましい。
溶媒への溶解性を高め、薄膜作製を容易にする観点から、数平均分子量は1×106以下であることが好ましい。
本発明の高分子化合物は、第1構造単位の原料になる単量体と、第2構造単位の原料になる単量体と、要すれば他の構造単位の原料になる単量体とを共重合することにより製造される。
で表される化合物をアルキル金属化して製造される。
第二の方法では、第1構造単位の原料になる単量体は、式(1)で表される構造単位の結合手にハロゲン原子が結合した化合物である。この単量体は、上記式(6)で表される化合物をハロゲン化して製造される。式(6)で表される化合物のハロゲン化は、式(2)で表される構造単位の結合手に水素原子が結合した化合物の代わりに式(6)で表される化合物を使用すること以外は実質的に上記の式(2)で表される構造単位の結合手に水素原子が結合した化合物をハロゲン化する反応と同様にして行うことができる。
本発明の高分子化合物は、電界効果移動度が高いことから、有機半導体材料として、例えば、有機半導体素子の有機層に含ませて用いることができる。有機半導体素子としては、有機トランジスタ、有機太陽電池、有機エレクトロルミネッセンス素子等が挙げられる。本発明の高分子化合物は、中でも、有機トランジスタの電荷輸送材料として特に有用である。
有機半導体材料は、本発明の高分子化合物の1種類を単独で含むものであってもよく、また2種類以上を含むものであってもよい。また、有機半導体材料は、キャリア輸送性を高めるため、本発明の高分子化合物に加え、キャリア輸送性を有する低分子化合物又は高分子化合物を更に含んでいてもよい。有機半導体材料が、本発明の高分子化合物以外の成分を含む場合は、本発明の高分子化合物を30重量%以上含むことが好ましく、50重量%以上含むことがより好ましい。本発明の高分子化合物の含有量が30重量%未満である場合、薄膜化が困難となったり、良好な電荷移動度が得られ難くなったりする場合がある。
有機トランジスタとしては、ソース電極及びドレイン電極と、これらの電極間の電流経路となり、本発明の高分子化合物を含む活性層と、該電流経路を通る電流量を制御するゲート電極とを備えた構成を有するものが挙げられる。このような構成を有する有機トランジスタとしては、電界効果型有機トランジスタ、静電誘導型有機トランジスタ等が挙げられる。
これらの材料は、1種を単独で用いても2種以上を併用してもよい。なお、ゲート電極4としては、高濃度にドープされたシリコン基板を用いることも可能である。高濃度にドープされたシリコン基板は、ゲート電極としての性能とともに、基板としての性能も併有する。このような基板としての性能も有するゲート電極4を用いる場合には、基板1とゲート電極4とが接している有機トランジスタにおいて、基板1を省略してもよい。
NMR測定は、化合物を重クロロホルム又は重アセトンに溶解させ、NMR装置(Varian社製、INOVA300)を用いて行った。
質量分析は、質量分析装置(AccuTOF TLC JMS-T100TD、日本電子製)により求めた。
高分子化合物の数平均分子量及び重量平均分子量は、ゲル透過クロマトグラフィ(GPC、Waters社製、商品名:Alliance GPC 2000)を用いて求めた。測定する高分子化合物は、オルトジクロロベンゼンに溶解させ、GPCに注入した。GPCの移動相にはオルトジクロロベンゼンを用いた。カラムは、TSKgel GMHHR-H(S)HT(2本連結、東ソー製)を用いた。検出器にはUV検出器を用いた。
(化合物2の合成)
(化合物3の合成)
(化合物4の合成)
トルエン溶液を塩酸水溶液で洗浄し、その後、水で洗浄した。その後、トルエン溶液中の溶媒をエバポレーターで蒸発させた。得られた固体を、ヘキサンを展開溶媒として用いたシリカゲルカラムで精製を行い、分離した化合物4を乾燥させた。化合物4の得量は1.4gであり、収率は57%であった。
(化合物5の合成)
(化合物6の合成)
(高分子化合物Aの合成)
(高分子化合物Bの合成)
(高分子化合物Cの合成)
(高分子化合物Dの合成)
(高分子化合物Eの合成)
(有機トランジスタ1の作製及び評価)
高分子化合物Aを含む溶液を用いて、図9に示す構造を有する有機トランジスタ1を作製した。
ゲート電極となる高濃度にドーピングされたn-型シリコン基板の表面を熱酸化し、シリコン酸化膜(以下、「熱酸化膜」という。)を形成した。熱酸化膜は絶縁層として機能する。次に、フォトリソ工程により熱酸化膜上にソース電極及びドレイン電極を作製した。該ソース電極及び該ドレイン電極は、熱酸化膜側からクロム(Cr)層と金(Au)層とを有し、チャネル長が20μm、チャネル幅が2mmであった。こうして得られた熱酸化膜、ソース電極及びドレイン電極を形成した基板をアセトンで超音波洗浄を行ない、オゾンUVクリーナーでUVオゾン処理を行なった。その後、β-フェネチルトリクロロシランで熱酸化膜の表面を修飾し、ペンタフルオロベンゼンチオールでソース電極及びドレイン電極の表面を修飾した。次に、上記表面処理した熱酸化膜、ソース電極及びドレイン電極上に、0.5重量%の高分子化合物Aのオルトジクロロベンゼン溶液を1000rpmの回転速度でスピンコートし、有機半導体層(活性層)を形成した。その後、有機半導体層を170℃で30分間加熱し、有機トランジスタ1を製造した。
(有機トランジスタ2の作製及び評価)
高分子化合物Aにかえて高分子化合物Cを用いた以外は実施例6と同様に有機トランジスタ2を作製した。
(化合物11の合成)
(化合物12の合成)
(化合物13の合成)
(化合物14の合成)
(化合物15の合成)
(高分子化合物Fの合成)
(高分子化合物Gの合成)
(高分子化合物Hの合成)
(高分子化合物Iの合成)
(有機トランジスタ3の作製及び評価)
高分子化合物Aにかえて高分子化合物Fを用いた以外は実施例6と同様に有機トランジスタ3を作製した。
(有機トランジスタ4の作製及び評価)
高分子化合物Aにかえて高分子化合物Gを用いた以外は実施例6と同様に有機トランジスタ4を作製した。
(有機トランジスタ5の作製及び評価)
高分子化合物Aにかえて高分子化合物Hを用いた以外は実施例6と同様に有機トランジスタ5を作製した。
(有機トランジスタ6の作製及び評価)
高分子化合物Aにかえて高分子化合物Iを用いた以外は実施例6と同様に有機トランジスタ6を作製した。
2、2a…活性層、
3…絶縁層、
4…ゲート電極、
5…ソース電極、
6…ドレイン電極、
100、110、120、130、140、150、160、170、180…有機トランジスタ。
Claims (10)
- 式
〔式中、Eは、それぞれ独立に、-O-、-S-又は-Se-を表す。R1は、それぞれ独立に、水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアルキルチオ基、アリール基、ヘテロアリール基又はハロゲン原子を表す。R2はそれぞれ独立に、水素原子、置換基を有していてもよいアルキル基、アリール基、ヘテロアリール基又はハロゲン原子を表すか、2個のR2が連結して環を形成し、残りのR2は、それぞれ独立に、水素原子、置換基を有していてもよいアルキル基、アリール基、ヘテロアリール基又はハロゲン原子を表す。〕
で表される構造単位と、式(1)で表される構造単位とは異なる式
〔式中、Ar1は、2価の芳香族基、-CR3=CR3-で表される基又は-C≡C-で表される基を表す。R3は、それぞれ独立に、水素原子、置換基を有していてもよいアルキル基、アリール基、ヘテロアリール基又はシアノ基を表す。〕
で表される構造単位とを含む高分子化合物。 - Eが、-S-である請求項1に記載の高分子化合物。
- R1が、水素原子である請求項1又は2に記載の高分子化合物。
- R2が、水素原子である請求項1~3のいずれか一項に記載の高分子化合物。
- 共役高分子化合物である請求項1~5のいずれか一項に記載の高分子化合物。
- 請求項1~6のいずれか一項に記載の高分子化合物を含む有機半導体材料。
- 請求項7に記載の有機半導体材料を含む有機層を有する有機半導体素子。
- ソース電極、ドレイン電極、ゲート電極及び活性層を有し、該活性層に請求項7に記載の有機半導体材料を含む有機トランジスタ。
- 式(7)で表される化合物と、金属水素化物とを反応させる工程を含む、式(8)で表される化合物の製造方法。
〔式中、Eは、それぞれ独立に、-O-、-S-又は-Se-を表す。R1は、それぞれ独立に、水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアルキルチオ基、アリール基、ヘテロアリール基又はハロゲン原子を表す。R2はそれぞれ独立に、水素原子、置換基を有していてもよいアルキル基、アリール基、ヘテロアリール基又はハロゲン原子を表すか、2個のR2が連結して環を形成し、残りのR2は、それぞれ独立に、水素原子、置換基を有していてもよいアルキル基、アリール基、ヘテロアリール基又はハロゲン原子を表す。R6は、それぞれ独立に、水素原子、置換基を有していてもよいアルキル基、置換基を有していてもよいアルコキシ基、置換基を有していてもよいアルキルチオ基、アリール基、ヘテロアリール基又はハロゲン原子を表す。〕
〔式中、E、R1、R2、及びR6は、前述と同じ意味を表す。〕
Priority Applications (2)
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| KR1020147004796A KR20140064789A (ko) | 2011-07-29 | 2012-07-26 | 고분자 화합물 및 그것을 이용한 유기 트랜지스터 |
| US14/235,377 US20140151680A1 (en) | 2011-07-29 | 2012-07-26 | Polymer compound and organic transistor using same |
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| JP2011166836 | 2011-07-29 | ||
| JP2011-166836 | 2011-07-29 |
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| WO2013018658A1 true WO2013018658A1 (ja) | 2013-02-07 |
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| PCT/JP2012/069017 Ceased WO2013018658A1 (ja) | 2011-07-29 | 2012-07-26 | 高分子化合物及びそれを用いた有機トランジスタ |
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| US (1) | US20140151680A1 (ja) |
| JP (1) | JP6006573B2 (ja) |
| KR (1) | KR20140064789A (ja) |
| TW (1) | TW201311758A (ja) |
| WO (1) | WO2013018658A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2015071698A (ja) * | 2013-10-03 | 2015-04-16 | 住友化学株式会社 | 化合物およびそれを用いた電子素子 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014114265A (ja) * | 2012-12-12 | 2014-06-26 | Kuraray Co Ltd | ジチオフェン化合物及びそのジチオフェン基を有するπ電子共役重合体、並びにその重合体を用いた有機半導体デバイス |
| EP3294744B1 (en) * | 2015-05-14 | 2020-04-08 | Eni S.p.A. | Indacen-4-one derivatives, process for their preparation and polymers containing them |
| CN112739743B (zh) * | 2018-09-19 | 2023-08-04 | 艾尼股份公司 | 包含引达省-4-酮衍生物的共轭聚合物、其制备方法和包括其的光伏装置 |
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| JPS63122727A (ja) * | 1986-11-11 | 1988-05-26 | Ricoh Co Ltd | 新規な重合体およびその製造方法 |
| JP2003221579A (ja) * | 2002-02-01 | 2003-08-08 | Toppan Printing Co Ltd | 有機発光材料 |
| JP2007112878A (ja) * | 2005-10-19 | 2007-05-10 | Ricoh Co Ltd | ベンゾジチオフェン重合体 |
| JP2007269775A (ja) * | 2006-03-10 | 2007-10-18 | Osaka Univ | 縮合環化合物及びその製造方法、重合体、これらを含む有機薄膜、並びに、これを備える有機薄膜素子及び有機薄膜トランジスタ |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2438104B1 (en) * | 2009-06-05 | 2014-04-30 | Basf Se | Fused bithiophene-vinylene polymers |
| EP2495272A4 (en) * | 2009-10-29 | 2013-05-01 | Sumitomo Chemical Co | POLYMER CONNECTION AND ELECTRONIC ELEMENT |
-
2012
- 2012-07-26 KR KR1020147004796A patent/KR20140064789A/ko not_active Withdrawn
- 2012-07-26 WO PCT/JP2012/069017 patent/WO2013018658A1/ja not_active Ceased
- 2012-07-26 US US14/235,377 patent/US20140151680A1/en not_active Abandoned
- 2012-07-27 JP JP2012167353A patent/JP6006573B2/ja not_active Expired - Fee Related
- 2012-07-27 TW TW101127162A patent/TW201311758A/zh unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63122727A (ja) * | 1986-11-11 | 1988-05-26 | Ricoh Co Ltd | 新規な重合体およびその製造方法 |
| JP2003221579A (ja) * | 2002-02-01 | 2003-08-08 | Toppan Printing Co Ltd | 有機発光材料 |
| JP2007112878A (ja) * | 2005-10-19 | 2007-05-10 | Ricoh Co Ltd | ベンゾジチオフェン重合体 |
| JP2007269775A (ja) * | 2006-03-10 | 2007-10-18 | Osaka Univ | 縮合環化合物及びその製造方法、重合体、これらを含む有機薄膜、並びに、これを備える有機薄膜素子及び有機薄膜トランジスタ |
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| M VERONELLI, ET AL.: "Photoinduced vibrational spectra of oligomers and polymers of thiophene derivatives", SYNTHETIC METALS, vol. 55, no. 1, 15 March 1993 (1993-03-15), pages 545 - 551, XP024161559 * |
| TIZIANA BENINCORI, ET AL.: "Conformational Effects on Electrical and Spectroscopic Properties of Bi-, Ter-, and Poly-thiophenes", J. CHEM. SOC., CHEM. COMMUN., 1995, pages 881 - 882 * |
| TIZIANA BENINCORI, ET AL.: "Stereoelectronic Effects in Polythiophenes", MOL. CRYST. LIQ. CRYST., vol. 236, no. 1, 1993, pages 181 - 188 * |
| ZERBI G., ET AL.: "Intramolecular delocalization of n electrons in polythiophenes with fixed conformation: A spectroscopic study", J. CHEM. PHYS., vol. 98, no. 6, 1993, pages 4531 - 4542 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015071698A (ja) * | 2013-10-03 | 2015-04-16 | 住友化学株式会社 | 化合物およびそれを用いた電子素子 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20140151680A1 (en) | 2014-06-05 |
| JP2013049842A (ja) | 2013-03-14 |
| KR20140064789A (ko) | 2014-05-28 |
| TW201311758A (zh) | 2013-03-16 |
| JP6006573B2 (ja) | 2016-10-12 |
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