JP2002015867A - EL device having photocatalyst containing layer and method of manufacturing the same - Google Patents

Abstract

(57) [Problem] To provide an EL element which can be patterned by a simple method and does not deteriorate the light emission characteristics, and a method of manufacturing the same. SOLUTION: The base, a first electrode formed on the base, an EL layer formed on the first electrode, and the EL
An EL device comprising at least a second electrode formed on a layer, wherein at least one photocatalyst-containing layer is formed at any position between the base and the second electrode, wherein the photocatalyst-containing layer is Includes a luminescent property improving substance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL (electroluminescence) device, and more particularly to an organic thin film EL device used for a display device.

[0002]

2. Description of the Related Art Attention has been paid to the use of EL elements as self-luminous planar display elements. Among them, an organic thin-film EL display using an organic substance as a light-emitting material has high luminous efficiency, such as realizing high-luminance light emission even at an applied voltage of slightly less than 10 V, and can emit light with a simple element structure. Is expected to be applied to advertisements for displaying the pattern of light emission and other low-cost displays for simple displays.

However, in actually manufacturing a display using EL elements, it is necessary to pattern electrodes and an organic EL layer, and typically requires a photolithography process and a patterning process using a complicated pattern film forming apparatus. However, this complicates the process and increases the cost. Further, in the method of patterning the organic EL material by mask vapor deposition, a high-priced vacuum device is required, and the yield and the cost are problematic. On the other hand, the method of forming a pattern by the ink-jet method has relatively simple steps, but has problems in terms of yield and film thickness uniformity. Advertising EL
When various shapes and large areas are required such as elements, there is a problem that productivity is significantly reduced.

As described above, in the production of an EL element, particularly, an organic EL display, the number of steps becomes very large in order to perform patterning of electrodes, organic EL layers, insulating layers, and the like, resulting in an increase in yield, productivity, and cost. Face big challenges.

The present inventors have previously used a photocatalyst-containing layer in the manufacturing process of an EL device, and formed a pattern due to a difference in wettability by patternwise exposing the photocatalyst-containing layer. It has been found that the above problem can be solved by forming a layer, a first electrode or a second electrode (Japanese Patent Application No. 2000-70493). However, since the photocatalyst-containing layer is basically insulative and is considered to lower the carrier injection efficiency of the EL element and lower the light-emitting characteristics, even if the photocatalyst-containing layer is used, an EL element that does not lower the light-emitting characteristics is required. It has been demanded.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an EL element which can be patterned by a simple method such as a spin coating method or a dip coating method. In addition, an object of the present invention is to provide an EL element which does not deteriorate the light emission characteristics and a method for manufacturing the same.

[0007]

Means for Solving the Problems The present inventors form a pattern based on the difference in wettability by patternwise exposing a photocatalyst-containing layer, and use the pattern to form an EL layer, a first electrode or a second electrode. In forming the present invention, the present inventors have found that the above problem can be solved by including a luminescent property improving substance in the photocatalyst containing layer, and completed the present invention.

Therefore, the EL device of the present invention comprises a base, a first electrode formed on the base, an EL layer formed on the first electrode, and a second electrode formed on the EL layer. An EL element comprising at least an electrode, wherein at least one photocatalyst-containing layer is formed at any position between the base and the second electrode, wherein the photocatalyst-containing layer contains a luminescent property improving substance. It is a feature.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION EL Element As described above, an EL element of the present invention comprises at least a base, a first electrode, an EL layer, and a second electrode laminated on each other. At least one photocatalyst-containing layer is formed at any position between the photocatalyst-containing layers, and the photocatalyst-containing layer contains a luminescent property improving substance. EL of the present invention
The device can include any layers that are commonly used for EL devices. In addition, it is preferable that the EL element is a display of full color display in which fine pixels are patterned, because the effect of the present invention is large.

FIG. 1 is a cross-sectional view of an example of the EL device of the present invention, in which a first electrode 2, a photocatalyst containing layer 3,
An EL layer 5 and a second electrode 6 are laminated, and another EL layer 4 is formed between the EL layer 5 and the portion 3 ′ of the photocatalyst containing layer 3 where the wettability has changed. I have.

Photocatalyst-Containing Layer (Photocatalyst-Containing Layer) In the present invention, the photocatalyst-containing layer means a layer whose wettability can be changed in the future by light irradiation and a layer which has already changed. The photocatalyst may be any substance as long as it causes such a change, and includes a light-emitting characteristic improving substance described later.
By exposing the photocatalyst-containing layer in a pattern, a pattern due to a change in wettability can be formed. Typically, a portion not irradiated with light is water- and / or oil-repellent, but a portion irradiated with light becomes highly hydrophilic and / or lipophilic. In the present invention, a layer (EL layer, first electrode, second electrode, etc.) provided on the photocatalyst-containing layer using a pattern due to the difference in wettability of the surface of the photocatalyst-containing layer
Can easily be formed with good quality.

Further, the photocatalyst-containing layer of the present invention may be provided at any position between the substrate and the second electrode, for example, between the substrate and the first electrode, between the first electrode and the second electrode. The space between the EL layer and the EL layer or between the EL layer and the second electrode when the EL layer includes a plurality of layers is used. The photocatalyst containing layer is provided between the first electrode and the EL layer,
It is preferable to pattern the EL layer. The photocatalyst-containing layer may be formed not only in one layer but also in a plurality of layers. In this case, the patterning of the plurality of layers formed on the photocatalyst-containing layer can be realized easily and with high quality.

If the thickness of the photocatalyst-containing layer is too small, the difference in wettability does not clearly appear and patterning becomes difficult. If the thickness is too large, the transport of holes or electrons is hindered.
Since the light emission of the L element is adversely affected, preferably 50 to
2000 °, more preferably 300 to 1000 °.

(Principle of wettability change) In the present invention,
Using a photocatalyst capable of causing a chemical change in a nearby substance (such as a binder) by light irradiation, a pattern due to a difference in wettability is formed in a portion irradiated with light. The mechanism of action by the photocatalyst is not always clear, but the carrier generated in the photocatalyst by light irradiation directly changes the chemical structure of the binder or the like, or the active oxygen species generated in the presence of oxygen or water binds the binder. It is considered that the surface wettability changes by changing the chemical structure such as the above.

(Light Emitting Property Improving Substance) The light emitting property improving substance contained in the photocatalyst-containing layer of the EL device of the present invention is a substance that enhances the light emitting property of the EL layer, for example, holes or electrons to the EL layer such as the light emitting layer. There is no particular limitation as long as it is a substance that promotes injection. In the present invention, even if the luminescent property improving substance is added to the photocatalyst-containing layer, it surprisingly hardly affects the wettability of the photocatalyst-containing layer after light irradiation.

When the photocatalyst-containing layer is provided between the EL layer and the anode, the effective luminescent property improving substance is typically a hole injection layer of the EL layer or a hole added to the anode buffer layer. Injection property improving substance materials such as phenylamine-based, starburst-type amine-based, phthalocyanine-based, oxides such as vanadium oxide, molybdenum oxide, ruthenium oxide, and aluminum oxide, amorphous carbon, polyaniline, and polythiophene derivatives. The addition amount of these hole injection property improving substances is 10 to 90% by weight, more preferably 30 to 70% by weight, so as not to impair the function of the photocatalyst containing layer. In addition, as a substance effective when the photocatalyst containing layer is provided between the EL layer and the anode, for example, the following hole transport materials can be given.

<Hole transporting material> Oxadiazole-based material
Oxazole, triazole, thiazole, triphenylmethane, styryl, pyrazoline, hydrazone, aromatic amine, carbazole, polyvinylcarbazole, stilbene, enamine, azine, triphenylamine, butadiene , A polycyclic aromatic compound, a stilbene dimer, etc., and more preferably a butadiene type, an enamine type, a hydrazone type, and a triphenylamine type are preferable because of their low ionization potential.
Among the hole transporting agents, examples of the π-conjugated polymer include polyacetylene, polydiacetylene, poly (P-phenylene), poly (P-phenylene sulfide), and poly (P-phenylene sulfide).
Phenylene oxide), poly (1,6-heptadiyne), poly (P-phenylenevinylene), poly (2,5
Thienylene), poly (2,5-pyrrole), poly (m-
(Phenylene sulfide), poly (4,4'-biphenylene) and the like. The charge transfer polymer complex, polystyrene · AgCl0 _4, polyvinyl naphthalene · T
CNE, polyvinyl naphthalene / P-CA, polyphenyl naphthalene / DDQ, polyvinyl mesitylene / TCN
E, polynaphthacetylene / TCNE, polyvinyl anthracene / Br ₂ , polyvinyl anthracene / I ₂ , polyvinyl anthracene / TNB, polydimethylaminostyrene / CA, polyvinyl imidazole / CQ, poly P-
Examples thereof include phenylene I ₂ · poly-1-vinylpyridine · I ₂ , poly-4-vinylpyridine · I ₂ , poly-P-1-phenylene · I ₂ , and polyvinylpyridium · TCNQ. Further, as the low molecular charge transfer complex, TCNQ
-TTF and the like, and metal complex polymers include polycopper phthalocyanine and the like. The addition amount of these hole transporting materials is 10 to 90% by weight, more preferably 30 to 70% by weight, so as not to impair the function of the photocatalyst containing layer. Also,
As an effective luminescent property improving substance when the photocatalyst containing layer is provided between the EL layer and the cathode, typically, a conventional EL
Electron injection property improving material added to the electron injection layer or the cathode buffer layer of the layer, for example, aluminum lithium, lithium fluoride, strontium, magnesium oxide, magnesium fluoride, strontium fluoride, calcium fluoride, barium fluoride, oxide Materials such as aluminum, strontium oxide, calcium, polymethyl methacrylate, and sodium polystyrene sulfonate can be used. The addition amount of these electron injection property improving substances is 10 to 90% by weight, more preferably 30 to 70% by weight, so as not to impair the function of the photocatalyst containing layer.

Regarding the effective substance to be added irrespective of the arrangement position of the photocatalyst-containing layer, a conventional E-type substance is typically used.
The following color-forming materials to be added to the light-emitting layer of the L layer are exemplified.

<Dye System> Cyclopentadiene derivative, tetraphenylbutadiene derivative, triphenylamine derivative, oxadiazole derivative, pyrazoloquinoline derivative, distyrylbenzene derivative, distyrylarylene derivative, silole derivative, thiophene ring compound, pyridine ring Compound, perinone derivative, perylene derivative, oligothiophene derivative, trifumanylamine derivative, oxadiazole dimer, virazoline dimer <metal complex type> aluminum quinolinol complex, benzoquinolinol beryllium complex, benzoxazole zinc complex,
Benzothiazole zinc complex, azomethyl zinc complex, porphyrin zinc complex, eurobium complex, etc., have Al, Zn, Be, etc. as a central metal or rare earth metals such as Tb, Eu, Dy, etc., and oxadiazole as a ligand, Metal complexes having a thiadiazole, phenylpyridine, phenylbenzimidazole, quinoline structure or the like.

<Polymer System> The polyfluorene derivative such as polyparaphenylenevinylene derivative, polythiophene derivative, polyparaphenylene derivative, polysilane derivative, polyacetylene derivative, polyvinylcarbazole and the like, and the amount of these coloring materials added depends on the function of the photocatalyst containing layer. In order not to impair, the content is 10 to 90% by weight, more preferably 30 to 70% by weight.

Further, as an effective substance to be added irrespective of the arrangement position of the photocatalyst-containing layer, the following doping materials can be mentioned.

<Doping Materials> Perylene derivatives, coumarin derivatives, rubrene derivatives, quinacridone derivatives, squarium derivatives, porphyrin derivatives, styryl dyes, tetracene derivatives, pyrazoline derivatives, decacyclene, phenoxazone. The addition amount of these doping materials is 10 to 90% by weight, more preferably 30 to 70% by weight, so as not to impair the function of the photocatalyst containing layer.

The following metal salts can also be mentioned.

<Metal salt> Effective luminescent property improving substance
Examples thereof include the following metal salts. FeCl₂, F
eCl₃, Cr (NO₃)₃, CrCl₃, NaN
O₃, Ca (NO₃)₂, Sr (NO₃)₂, Co (N
O₃)₂, CoCl₂, Cd (NO₃)₂, Mg (NO
₃)₂, Cu (CH₃COO)₂, Cu (NO₃)₂,
Ni (NO₃)₂, Mn (NO₃)₂, MnCl₂, P
bNO₃, RuCl₃, IrCl₄, Ir (N
O₃)₃, ScCl₃, Sc (NO₃)₃, H₂PtC
l₆, RhCl ₃, Tb (NO₃)₃, Pr (NO₃)
₃, Dy (NO₃)₃, Sm (NO₃) ₃, Ga (NO
₃)₃, Gb (NO₃)₃, Yb (NO₃)₃, NbC
l₅, ZrCl₄, Zr (NO₃)₂, KNO₃, Li
NO₃, HAsCl₄, Pd (NO₃)₂, Eu (NO
₃)₂, Nd (NO₃)₂, NiCl₃, Ce (N
O₃) ₃, CsNO₃, Er (NO₃)₃, Ba (NO
₃)₂, La (NO₃)₃, AgCl, CH₃CH (O
H) COOAg, AgNO₃, TlNO₃, Y (N
O₃)₃, Pb (NO₃)₂, Ho (NO₃)₃, Bi
(NO₃)₃. These are titanium oxide and the like in the photocatalyst containing layer.
0.001 to 1 part by weight of the sum of
0 parts by weight, preferably 0.1 to 1 part by weight
No. Metal salts of Fe or Cu, especially FeCl₂, F
eCl₃, Cu (NO₃)₂, Cu (CH₃COO)₂
Is preferred for improving the light emission characteristics.

(Photocatalyst Material) Examples of the photocatalyst material used in the present invention include titanium oxide (TiO ₂ ), zinc oxide (ZnO), tin oxide (SnO ₂ ) and strontium titanate (SrTi) which are known as optical semiconductors.
Metal oxides such as O ₃ ) / tungsten oxide (WO ₃ ), bismuth oxide (Bi ₂ O ₃ ), and iron oxide (Fe ₂ O ₃ ) can be given, and titanium oxide is particularly preferred. Titanium oxide has a high band gap energy,
It is advantageous in that it is chemically stable, has no toxicity, and is easily available.

As titanium oxide as a photocatalyst, both anatase type and rutile type can be used, but anatase type titanium oxide is preferred. Specifically, for example, anatase titania sol of peptic hydrochloride type (Ishihara Sangyo Co., Ltd., STS-02, average crystallite diameter 7 nm), anatase titania sol of nitric acid deflocculation type (Nissan Chemical, TA-
15, average crystallite diameter of 12 nm).

The amount of the photocatalyst in the photocatalyst-containing layer is preferably from 1 to 80% by weight, more preferably from 30 to 65% by weight.

(Binder component) The binder that can be used in the photocatalyst-containing layer of the present invention preferably has a high binding energy such that the main skeleton is not decomposed by the photoexcitation of the photocatalyst. Examples include organopolysiloxanes that exhibit large strength by hydrolyzing and polycondensing chloro or alkoxysilanes by reaction or the like, or (2) organopolysiloxanes obtained by crosslinking reactive silicones having excellent water repellency and oil repellency. Can be.

In the case of the above (1), the general formula Y _n SiX
One or more hydrolyzed condensates and co-hydrolyzed compounds of the silicon compound represented by _4-n (n = 1 to 3) can be the main component. In the above general formula, Y can be, for example, an alkyl group, a fluoroalkyl group, a vinyl group, an amino group or an epoxy group, and X is, for example, a halogen,
It can be a methoxyl, ethoxyl, or acetyl group.

Specifically, methyltrichlorosilane, methyltribromosilane, methyltrimethoxysilane, methyltriethoxysilane, methyltriisopropoxysilane, methyltri-t-butoxysilane; ethyltrichlorosilane, ethyltribromosilane, ethyltrichlorosilane Methoxysilane, ethyltriethoxysilane, ethyltriisopropoxysilane, ethyltri-t-butoxysilane; n
-Propyltrichlorosilane, n-propyltribromosilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, n-propyltriisopropoxysilane, n-propyltri-t-butoxysilane; n-
Hexyltrichlorosilane, n-hexyltribromosilane, n-hexyltrimethoxysilane, n-hexyltriethoxysilane, n-hexyltriisopropoxysilane, n-hexyltri-t-butoxysilane; n-decyltrichlorosilane, n-decyl Tribromosilane,
n-decyltrimethoxysilane, n-decyltriethoxysilane, n-decyltriisopropoxysilane, n-
Decyltri-t-butoxysilane; n-octadecyltrichlorosilane, n-octadecyltribromosilane, n
-Octadecyltrimethoxysilane, n-octadecyltriethoxysilane, n-octadecyltriisopropoxysilane, n-octadecyltri-t-butoxysilane; phenyltrichlorosilane, phenyltribromosilane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyl Triisopropoxysilane, phenyltri-t-butoxysilane; tetrachlorosilane, tetrabromosilane, tetramethoxysilane, tetraethoxysilane, tetrabutoxysilane, dimethoxydiethoxysilane; dimethyldichlorosilane, dimethyldibromosilane, dimethyldimethoxysilane , Dimethyldiethoxysilane; diphenyldichlorosilane, diphenyldibromosilane, diphenyldimethoxysilane, diphenyldiethoxysilane Phenyl methyldichlorosilane,
Phenylmethyldibromosilane, phenylmethyldimethoxysilane, phenylmethyldiethoxysilane; trichlorohydrosilane, tribromohydrosilane, trimethoxyhydrosilane, triethoxyhydrosilane, triisopropoxyhydrosilane, tri-t-butoxyhydrosilane; vinyltrichlorosilane, vinyltribromo Silane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriisopropoxysilane, vinyltrit
-Butoxysilane; trifluoropropyltrichlorosilane, trifluoropropyltribromosilane, trifluoropropyltrimethoxysilane, trifluoropropyltriethoxysilane, trifluoropropyltriisopropoxysilane, trifluoropropyltri-t-butoxysilane; γ- Glycidoxypropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ
Glycidoxypropyltriisopropoxysilane, γ
-Glycidoxypropyltri-t-butoxysilane; γ-
Methacryloxypropylmethyldimethoxysilane, γ
-Methacryloxypropylmethyldiethoxysilane,
γ-methacryloxypropyltrimethoxysilane, γ
-Methacryloxypropyltriethoxysilane, γ-
Methacryloxypropyltriisopropoxysilane,
γ-methacryloxypropyltri-t-butoxysilane; γ-aminopropylmethyldimethoxysilane, γ-
Aminopropylmethyldiethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltriisopropoxysilane, γ-aminopropyltri-t-butoxysilane;
γ-mercaptopropylmethyldimethoxysilane, γ-
Mercaptopropylmethyldiethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-mercaptopropyltriethoxysilane, γ-mercaptopropyltriisopropoxysilane, γ-mercaptopropyltri-t-butoxysilane; β- (3,4-epoxy Cyclohexyl) ethyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriethoxysilane; and partial hydrolysates thereof; and mixtures thereof.

As the binder, a polysiloxane containing a fluoroalkyl group can be particularly preferably used. Specifically, one or two or more of hydrofluorocondensates of the following fluoroalkylsilanes are used. Examples include a hydrolytic condensate, and those generally known as a fluorine-based silane coupling agent may be used.

CF ₃ (CF ₂ ) ₃ CH ₂ CH ₂ Si (OCH ₃ ) ₃ CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ Si (OCH ₃ ) ₃ CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ Si ( _{OCH 3) 3 CF 3 (CF} 2) 9 CH 2 CH 2 Si (OCH 3) 3 (CF 3) 2 CF (CF 2) 4 CH 2 CH 2 Si (OCH 3) 3 (CF 3) 2 CF (CF _{2) 6 CH 2 CH 2 Si} (OCH 3) 3 (CF 3) 2 CF (CF 2) 8 CH 2 CH 2 Si (OCH 3) 3 CF 3 (C 6 H 4) C 2 H 4 Si (OCH 3 ) ₃ CF ₃ (CF ₂ ) ₃ (C ₆ H ₄ ) C ₂ H ₄ Si (OCH ₃ ) ₃ CF ₃ (CF ₂ ) ₅ (C ₆ H ₄ ) C ₂ H ₄ Si (OCH ₃ ) ₃ CF ₃ (CF ₂ ) ₇ (C _{6 H 4) C 2 H 4 Si} (OCH 3) 3 CF 3 (CF 2) 3 CH 2 CH 2 SiCH 3 (OCH 3) 2 CF 3 (CF 2) 5 CH 2 CH 2 SiCH 3 (OCH 3) 2 CF _{3 (CF 2) 7 CH 2} CH 2 SiCH 3 (OCH 3) 2 CF 3 (CF 2) 9 CH 2 CH 2 SiCH 3 (OCH 3) 2 (CF 3) 2 CF (CF 2) 4 CH 2 CH 2 SiCH ₃ (OCH ₃ ) ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH ₂ SiCH ₃ (OCH ₃ ) ₂ (CF ₃ ) ₂ CF (CF ₂ ) ₈ CH ₂ CH ₂ SiCH ₃ (OCH ₃ ) _{2 CF 3 (C 6 H 4} ) C 2 H 4 SiCH 3 (OCH 3) 2 CF 3 (CF 2) 3 (C 6 H 4) C 2 H 4 SiCH 3 (OCH 3) 2 CF _{(CF 2) 5 (C 6} H 4) C 2 H 4 SiCH 3 (OCH 3) 2 CF 3 (CF 2) 7 (C 6 H 4) C 2 H 4 SiCH 3 (OCH 3) 2 CF 3 (CF _{2) 3 CH 2 CH 2 Si} (OCH 2 CH 3) 3 CF 3 (CF 2) 5 CH 2 CH 2 Si (OCH 2 CH 3) 3 CF 3 (CF 2) 7 CH 2 CH 2 Si (OCH 2 CH _{3) 3 CF 3 (CF 2} ) 9 CH 2 CH 2 Si (OCH 2 CH 3) 3 CF 3 (CF 2) 7 SO 2 N (C 2 H 5) C 2 H 4 CH 2 Si (OCH 3) 3 By using a polysiloxane containing a fluoroalkyl group as described above as a binder, the water repellency and oil repellency of the non-light-irradiated portion of the photocatalyst containing layer are greatly improved.

As the reactive silicone of the above (2),
A compound having a skeleton represented by the following general formula can be given.

-(Si (R ¹ ) (R ² ) O) _n-wherein n is an integer of 2 or more, and R ¹ and R ² are each a substituted or unsubstituted alkyl, alkenyl or aryl having 1 to 10 carbon atoms. Alternatively, it can be a cyanoalkyl group. Preferably, up to 40 mol% of the total can be vinyl, phenyl or phenyl halide. Also,
It is preferable that R ¹ and / or R ² be a methyl group because the surface energy is minimized. Preferably, the methyl group is at least 60 mol%, and at least one of the methyl group and the chain end or side chain in the molecular chain It has a reactive group such as the above hydroxyl group.

Further, a stable organosilicon compound which does not cause a cross-linking reaction such as dimethylpolysiloxane may be mixed with the above-mentioned organopolysiloxane in a binder.

(Other Components Used in Photocatalyst-Containing Layer) The photocatalyst-containing layer used in the present invention may contain a surfactant in order to reduce the wettability of the unexposed portion. The surfactant is not limited as long as it can be decomposed and removed by a photocatalyst, and specifically, preferably, for example, NIKKOL BL, manufactured by Nippon Surfactant Industries, Ltd.
Hydrocarbon surfactants such as BC, BO and BB series, manufactured by DuPont: ZONYL FSN, FSO, manufactured by Asahi Glass: Surflon S-141, 145, manufactured by Dainippon Ink: Megafac F-141, 144, Neos: Futagent F-200, F251; Daikin Industries: Unidyne DS-401, 402; 3M: Florard FC-170, 176, etc. Fluorinated or silicone-based nonionic surfactants. In addition, cationic, anionic and amphoteric surfactants can also be used.

The photocatalyst-containing layer suitably used in the present invention contains other components such as polyvinyl alcohol,
Unsaturated polyester, acrylic resin, polyethylene, diallyl phthalate, ethylene propylene diene monomer, epoxy resin, phenol resin, polyurethane, melamine resin, polycarbonate, polyvinyl chloride, polyamide, polyimide, styrene butadiene rubber, chloroprene rubber, polypropylene, polybutylene, polystyrene And oligomers and polymers such as polyvinyl acetate, nylon, polyester, polybutadiene, polybenzimidazole, polyacrylonitrile, epichlorohydrin, polysulfide, and polyisoprene.

Further, the photocatalyst-containing layer used in the present invention may contain a sensitizing dye which is a component for sensitizing the photoactivity of the photocatalyst. By adding such a sensitizing dye, the wettability can be changed at a low exposure dose, or the wettability can be changed at a different wavelength.

(Method for Forming Photocatalyst-Containing Layer) The method for forming the photocatalyst-containing layer is not particularly limited. For example, a coating solution containing a photocatalyst is applied to a substrate by a method such as spray coating, dip coating, roll coating, or bead coating. It can be formed by coating.

When a coating solution containing a photocatalyst or the like is used, a solvent that can be used for the coating solution is one that is mixed with the photocatalyst solution to dissolve the hole injection material and the hole transport material. If the solvent is used, it is possible to prevent patterning characteristics from being deteriorated due to cloudiness or other phenomena. Examples of coating solvents containing such photocatalysts include alcohols such as ethanol and isopropanol, acetone, acetonitrile, ethylene glycol monomethyl ether, ethylene glycol dimethyl ether, dimethylformamide, dimethylsulfoxide, dioxane, ethylene glycol, and hexamethylphosphoric triamide. , Pyridine, tetrahydrofuran, N-methylpyrrolidinone, and the like, and a mixed solvent thereof.

(Irradiation Beam for Activating Photocatalyst) The irradiation beam for activating the photocatalyst is not limited as long as the photocatalyst can be excited. Examples of such a material include ultraviolet light, visible light, and infrared light, as well as electromagnetic waves and radiation having a shorter or longer wavelength than these light beams.

For example, when anatase type titania is used as the photocatalyst, the excitation wavelength of the photocatalyst is 380 nm or less, so that the photocatalyst can be excited by ultraviolet rays. As a device emitting such ultraviolet rays, a mercury lamp, a metal halide lamp, a xenon lamp, an excimer laser, and other ultraviolet light sources can be used.

EL Layer The EL layer provided in the EL element of the present invention is not limited as long as it causes electroluminescence. The EL layer is provided on the first electrode (between the first electrode and the second electrode). However, even if the EL layer is provided directly on the first electrode, the first electrode and the EL layer may be provided as necessary. A photocatalyst containing layer or another layer may be interposed between them.

The EL layer of the present invention further comprises, as essential components, a light-emitting layer as an essential layer, and as an optional layer, a hole-transporting layer for transporting holes to the light-emitting layer and an electron-transporting layer for transporting electrons. May be collectively referred to as a charge transport layer), and a hole injection layer for injecting holes into the light emitting layer or the hole transport layer, and an electron injection layer for injecting electrons into the light emitting layer or the electron transport layer (these may be referred to as a charge transport layer). May be collectively referred to as a charge injection layer).

As the materials constituting these EL layers, there are the above-mentioned materials which can be added to the photocatalyst-containing layer as the materials themselves, and examples thereof include the following.

(Emitting Layer) <Dye System> Cyclopentadiene derivative, tetraphenylbutadiene derivative, triphenylamine derivative, oxadiazole derivative, pyrazoloquinoline derivative, distyrylbenzene derivative, distyrylarylene derivative, silole derivative, thiophene ring Compound, pyridine ring compound,
Perinone derivative, perylene derivative, oligothiophene derivative, trifmanylamine derivative, oxadiazole dimer, virazoline dimer <metal complex type> aluminum quinolinol complex, benzoquinolinol beryllium complex, benzoxazole zinc complex,
Benzothiazole zinc complex, azomethyl zinc complex, porphyrin zinc complex, eurobium complex, etc., have Al, Zn, Be, etc. as a central metal or rare earth metals such as Tb, Eu, Dy, etc., and oxadiazole as a ligand, Metal complexes having a thiadiazole, phenylpyridine, phenylbenzimidazole, quinoline structure or the like.

<Polymer System> Polyparaphenylene vinylene derivative, polythiophene derivative, polyparaphenylene derivative, polysilane derivative, polyacetylene derivative, polyvinylcarbazole, etc., polyfluorene derivative (doping material) perylene derivative, coumarin derivative,
Rubrene derivative, quinacridone derivative, squarium derivative, porphyrin derivative, styryl dye, tetracene derivative, pyrazoline derivative, decacyclene, phenoxazone (hole injection layer (anode buffer material)) phenylamine, starburst amine, phthalocyanine, oxidation Oxides such as vanadium, molybdenum oxide, ruthenium oxide, and aluminum oxide, amorphous carbon, polyaniline, and polythiophene derivatives (electron injection layer (cathode buffer material)) aluminum lithium, lithium fluoride, strontium, magnesium oxide, magnesium fluoride, fluoride Strontium, calcium fluoride, barium fluoride, aluminum oxide, strontium oxide, calcium, polymethyl methacrylate, polystyrene sulfonate The EL layer (partition wall layer material of the EL layer) helium can also be provided partition wall, the partition wall is particularly useful when combining EL layer emitting a different color. Examples of such a material include a photosensitive polyimide resin, an acrylic resin, a photocurable resin, a thermosetting resin, and a water-repellent resin.

First Electrode and Second Electrode In this specification, the electrode provided first on the base is referred to as a first electrode, and the electrode provided thereafter on the EL layer is referred to as a second electrode. Although these electrodes are not particularly limited, preferably, the electrodes include an anode and a cathode, and in this case, the first electrode may be either an anode or a cathode. Either the anode or the cathode is transparent or translucent.
A conductive material having a large work function is preferable so that holes can be easily injected, and a conductive material having a small work function is preferable for the cathode so that electrons can be easily injected. Further, a plurality of materials may be mixed. The resistance of each electrode is preferably as low as possible. In general, a metal material is used, but an organic substance or an inorganic compound may be used.

Specifically, preferred anode materials are ITO,
Examples of indium oxide, gold, polyaniline, and cathode materials include magnesium alloys (eg, MgAg), aluminum alloys (eg, AlLi, AlCa, AlMg), and calcium metal.

Substrate In the present invention, the substrate is a substrate on which electrodes and an EL layer are provided, and can be made of a transparent material if desired, but may be an opaque material. In the EL device of the present invention, the substrate may be the first electrode itself, but usually the first electrode is provided directly or via an intermediate layer on the surface of the substrate that maintains strength.

Insulating Layer In a preferred embodiment of the EL device of the present invention, at least one insulating layer can be partially formed on the photocatalyst containing layer. The insulating layer is preferably made of a material containing a photocurable resin such as an ultraviolet curable resin or a thermosetting resin, and the insulating layer portion can be formed into a pattern as a non-light emitting portion.

Manufacturing Method The method for manufacturing an EL device of the present invention uses an EL device on a photocatalyst-containing layer.
In an embodiment in which a layer is provided, a step of forming a first electrode on a substrate, a step of forming a photocatalyst-containing layer on the first electrode, and exposing the photocatalyst-containing layer in a pattern to obtain a wettability Forming a pattern based on the difference between the two, and applying an EL layer forming solution on the exposed portion of the photocatalyst-containing layer to form the patterned EL layer; and forming the second electrode on the EL layer. And a forming step.

The EL device of the present invention, in which a photocatalyst-containing layer is provided between a plurality of EL layers, is characterized in that:
Forming a photocatalyst-containing layer on the first EL layer instead of on the first electrode, and applying a second EL layer forming liquid on the exposed portion of the photocatalyst-containing layer to form the patterned second EL layer. Except for including, it can be manufactured in the same manner as the above method.

According to the EL device of the present invention in which the first electrode is provided on the photocatalyst-containing layer, the photocatalyst-containing layer is formed on the substrate instead of the first electrode in the above-mentioned method, On the part, the first electrode forming liquid is applied,
Except for including the step of forming the patterned first electrode, it can be manufactured in the same manner as the above method.

According to the EL device of the present invention in which the second electrode is provided on the photocatalyst-containing layer, the photocatalyst-containing layer is formed on the EL layer instead of the first electrode in the above-mentioned method. It can be manufactured in the same manner as the above method except that a step of forming the patterned second electrode by applying the second electrode forming liquid on the exposed portion is included.

In the EL device of the present invention in which an insulating layer is provided on a photocatalyst-containing layer, an insulating-layer-forming liquid patterned by applying an insulating-layer-forming liquid onto an exposed portion of the photocatalyst-containing layer is provided by:
Except for including a step of forming an insulating layer by curing by a method such as drying, heat curing, or photocuring, it can be manufactured in the same manner as the above method.

Except for the photocatalyst-containing layer and the layer formed thereon, a normal EL element manufacturing method can be used.

Solvents of Coating Liquid Liquids applied to form each layer on the photocatalyst-containing layer, for example, an EL layer forming liquid, a first electrode forming liquid, and a second electrode forming liquid (these are collectively referred to as a coating liquid). Preferably, the solvent is a polar solvent such as water. A coating solution using such a polar solvent has high wettability with the exposed portion of the photocatalyst-containing layer and has a strong tendency to repel the unexposed portion, which is advantageous in patterning the coating solution.

Coating Method Application of the coating solution to the photocatalyst-containing layer includes spin coating, ink jetting, dip coating, blade coating, and dropping to the photocatalyst-containing layer.

Patterning Method Layers such as the EL layer, the first electrode, and the second electrode formed on the photocatalyst-containing layer are patterned by a method of patterning in the state of a coating solution before solidification, or by forming a layer after solidification. It is also possible to peel off only a portion having low wettability in the state of being performed. Specific examples include a method of inclining the substrate before solidification, a method of blowing air, and a method of sticking and peeling off an adhesive tape after solidification.

[0061] Wettability pattern and pixel EL element of the present invention, when a display of a full color display, preferably, in correspondence to the pattern by wettability differences between the photocatalyst-containing layer to form a pixel of the display.

[0062]

Example 1 The following coating solution was prepared.

(Coating Solution 1, Photocatalyst-Containing Layer Forming Solution) 3 parts by weight of isopropyl alcohol Fluoroalkoxylan ( MF-160E manufactured by Tochem Products) 0.014 part by weight of anatase-type titania sol (ST-K03 manufactured by Ishihara Sangyo Co., Ltd.) 2 parts by weight The mixture heated and stirred at 100 ° C. for 20 minutes was diluted with 10 parts by weight of isopropyl alcohol, and this was used as a coating liquid 1 (the photocatalyst was also abbreviated as DSR).

(Coating Solutions 2 and 3, Photocatalyst-Containing Layer-Forming Liquid Containing Luminescent Property-Improving Substance)
4-Ethylenedioxythiophene / polystyrene sulfonate aqueous dispersion (abbreviated name PEDOT / PSS, trade name Ba)
ytron PTPAI4083 (Bayer) at a weight ratio of 2: 1 and 1: 2, respectively, to obtain coating solutions 2 and 3, respectively.

(Coating Liquid 4, Light Emitting Property Enhancing Material Layer Forming Liquid)
The above 3,4-ethylenedioxythiophene / polystyrene sulfonate aqueous dispersion (Baytron PTPA)
I4083) was used alone as coating solution 4.

(Coating Liquid 5, EL Layer Forming Liquid) Polyfluorene Derivative 1 part by weight Xylene 66.67 parts by weight A polyfluorene derivative was synthesized by the following method.

Under a dry nitrogen stream, 5.0 g of fluorene (3
0 mmol) in dry tetrahydrofuran.
At 78 ° C, 22 ml (35 mmol) of a 1.6 M normal butyllithium hexane solution was added dropwise, followed by stirring at -78 ° C for 1 hour. Subsequently, 4.9 ml (35 mmol) of normal hexyl bromide was added dropwise thereto, and the mixture was stirred at -78 ° C for 1 hour and further at room temperature for 1 hour. Then likewise-
At 78 ° C, 22 ml (35 mmol) of a 1.6 M normal butyllithium hexane solution was added dropwise, followed by stirring at -78 ° C for 1 hour. Subsequently, 4.9 ml (35 mmol) of normal hexyl bromide was added dropwise thereto, and the mixture was heated at -78 ° C for 1 hour.
And stirred at room temperature for 1 hour. After water was added dropwise under zero ice, the mixture was extracted with ethyl acetate, dried over magnesium sulfate and dried, and the solvent was distilled off. This was recrystallized from hexane to give 9.5 g (95%) of 9,9-dihexylfluorene.
I got

2.0 g of 9,9-dihexylfluorene
(6.0 mmol), 0.02 g of iron (III) chloride (0.
12 mmol) was dissolved in 9 ml of chloroform, and 1.2 g of bromine dissolved in 3 ml of chloroform was added dropwise to a solution stirred at 0 ° C. under light shielding. The mixture was stirred at room temperature for 18 hours, washed with an aqueous solution of sodium thiosulfate, dried over magnesium sulfate and dried, and the solvent was distilled off. The residue was separated and purified by column chromatography (eluent: hexane) to obtain 2.4 g (92%) of 2,7-dibromo-9,9-dihexylfluorene.

Under a stream of dry nitrogen, 2,7-dibromo-9,
2.0 g (4.0 mmol) of 9-dihexylfluorene
Was dissolved in 40 ml of dry tetrahydrofuran, 5.3 ml (8.4 mmol) of 1.6 M normal butyl lithium hexane solution was added dropwise thereto under ice cooling, and the mixture was stirred at 0 ° C for 1 hour. Subsequently, 2-isopropoxy-4,4,4
2.0 ml (10 mmol) of 5,5-tetramethyl-1,3,2-dioxaborane was added dropwise, and the mixture was stirred at 0 ° C. for 1 hour and further at room temperature for 12 hours. After water was added dropwise under ice-cooling, the mixture was extracted with diethyl ether, dried over magnesium sulfate and dried, and the solvent was distilled off. The residue was washed with ethanol and recrystallized with a mixed solution of ethanol / hexane to give 2,7-bis (4,4,5,5-tetramethyl-
1.4 g (60%) of (1,3,2-dioxaboran-2-yl) -9,9-dihexylfluorene were obtained.

Under a dry nitrogen stream, 2,7-bis (4,4,4
5,5-tetramethyl-1,3,2-dioxaborane-
2-yl) -9,9-dihexylfluorene 0.53 g
And 0.45 g of 2,7-dibromo-9,9-dihexylfluorene and 0.02 g of tetrakis (trisphenylphosphine) palladium were dissolved in 18 ml of dry toluene, and 27 ml of a 2M aqueous sodium carbonate solution was added thereto. For 48 hours. After cooling, the mixture was poured into methanol, and the solid content was washed with a dilute aqueous hydrochloric acid solution. Then, using acetone as a solvent, dissolved components were removed with a Soxhlet refluxer to separate insoluble portions. This was dissolved in chloroform and reprecipitated with methanol to obtain the desired polyfluorene derivative.

Washing and surface treatment were performed on an ITO glass substrate patterned into a strip having a width of 12 mm at the center, and coating solutions 1, 2, 3, and 4 were formed thereon by spin coating.

These were placed in a clean oven at 150 ° C. for 1 hour.
By heating for 0 minutes, drying and baking, a film thickness of 50
nm thin films were formed.

Subsequently, the film composed of the coating liquids 1, 2, and 3 was irradiated with a high-pressure mercury lamp (main wavelength: 365 nm) at an irradiation dose of 5 nm.
Exposure was performed at 000 mJ.

Further, the above-mentioned coating solution 5 was applied on a film composed of these and the coating solution 4 by a spin coater.
A 100 nm thin film was formed.

Finally, as an upper electrode, LiF 0.5 nm, aluminum 15
0 nm was mask deposited.

Next, light emission was observed by driving the Al electrode on the ITO electrode as an address electrode.

When the light emitting characteristics of the manufactured device were measured, the luminance-voltage characteristics as shown in FIG. 2 were obtained. It can be seen that when the photocatalyst-containing layer contains the light-emitting property improving substance, the light-emission starting voltage decreases and the luminance at the same applied voltage also increases.

Example 2 The following coating solution was prepared.

(Coating Solution 6, Photocatalyst-Containing Layer-Forming Solution) Isopropyl alcohol 19.5 parts by weight Fluoroalkoxylan (MF-160E manufactured by Tochem Products) 0.42 parts by weight Anatase type titania sol (ST-K03 manufactured by Ishihara Sangyo Co., Ltd.) 2 parts by weight Hydrochloric acid (1M) 4 parts by weight The above materials were mixed in order and heated and stirred at 100 ° C. for 1 hour to obtain a coating liquid 6.

(Coating Solution 7, Photocatalyst-Containing Layer-Forming Solution Containing Emission Property Improving Substance) The coating solution 1 and an aqueous dispersion of poly 3,4-ethylenedioxythiophene / polystyrene sulfonate (Baytron PTPAI4083) were used in a weight ratio of 2:
The mixture obtained in 1 was used as a coating liquid 7.

(Coating liquid 8, luminescent property improving substance (metal salt)
Coating solution containing photocatalyst) Coating solution 8 was prepared by adding 0.02 g of ferric chloride to coating solution 1.

(Coating Solution 9, Solution for Forming Luminescent Property Enhancing Material Layer) Aqueous dispersion of poly3,4-ethylenedioxythiophene / polystyrene sulfonate (Baytron PTPAI40) used as a luminescent property improving substance in Coating Solution 7
83) alone was used as coating solution 9. This coating solution 9
Is used as a hole transport material in an organic EL element, but does not have patterning characteristics by light exposure.

Washing and surface treatment were performed on an ITO glass substrate patterned in a 12 mm wide band at the center, and coating solutions 6, 7, 8, and 9 were formed thereon by a spin coater.

These were heated in a clean oven at 150 ° C. for 15 minutes, dried and fired to obtain a film having a thickness of 50 n.
m were formed.

Subsequently, the film composed of the coating liquids 7, 8, 9 was irradiated with a high-pressure mercury lamp (wavelength 365 mm) at an irradiation dose of 5 mm.
Exposure was performed at 000 mj.

Thereafter, the coating liquids 6, 7, which have been exposed,
The above-mentioned coating solution 5 was applied by spin coating on a film made of coating film 8 and a film made of coating solution 9 to form a 100 nm thin film.

Finally, as an upper electrode, 0.5 nm of LiF and 1 mm of aluminum were used so as to be orthogonal to the ITO pattern.
50 nm was mask deposited.

Next, light emission was observed by driving the Al electrode on the ITO electrode as an address electrode.

When the light emission characteristics of the fabricated device were measured, a luminance-voltage characteristic as shown in FIG. 3 and a light emission efficiency-voltage characteristic as shown in FIG. 4 were obtained. As can be seen from the comparison of the results of the coating solutions 6 and 7, by mixing the light-emitting property improving substance into the photocatalyst-containing layer, the light-emission starting voltage is reduced, and
The luminous efficiency was also slightly improved.

Further, by adding a metal salt (ferric chloride), which is a luminescent property improving substance, to the photocatalyst-containing layer (coating liquid 8), an EL element using only the luminescent property improving substance (coating liquid 9) was used. An EL device having the same starting voltage, a maximum luminance of 2 times or more, and a luminous efficiency of 1.5 times or more, realizing high luminance and high efficiency was obtained.

Further, it is understood from the measurement of the contact angle before and after the light irradiation that the film formed by the coating liquid 8 has almost no change in the patterning performance due to the light irradiation as compared with the film formed by the coating liquid 6. Both showed a super hydrophilicity of 70 ° before light irradiation and 10 ° or less after light irradiation.)

Example 3 The following coating solution was prepared.

A solution was prepared by adding the following metal salts in an amount of 6 × 10 ⁻⁴ mol to the coating solution 6 (4 g) used in Example 2.

Metal Salt A. Ferric chloride B. Copper nitrate trihydrate C.I. Cobalt chloride D. Nickel nitrate E. Manganese nitrate hexahydrate F. Silver nitrate G. Silver lactate Lanthanum nitrate hexahydrate I. Yttrium nitrate hexahydrate Holmium nitrate pentahydrate Magnesium nitrate hexahydrate L. Cadmium nitrate tetrahydrate Neodymium nitrate hexahydrate Calcium nitrate tetrahydrate Lithium nitrate Eurobium nitrate hexahydrate Q. Erbium nitrate pentahydrate Cerium nitrate hexahydrate Tetrachloroauric acid tetrahydrate Hexachloroplatinic acid hexahydrate U.S. Barium nitrate Sodium nitrate Strontium nitrate X. Zirconium nitrate dihydrate Y. Lead nitrate Z. Indium nitrate trihydrate AA. Thallium nitrate BB. Cesium nitrate CC. Potassium nitrate DD. Rubidium nitrate EE. Palladium nitrate hydrate FF. Zinc nitrate GG. Osmium trichloride HH. Aluminum chloride II. Aluminum nitrate A 12 mm-width patterned ITO glass substrate in the center was washed and surface-treated, and a coating solution obtained by adding metal salts A to JJ to coating solution 2 was formed thereon by a spin coater. .

These are heated in a clean oven at 150 ° C. for 15 minutes, dried and fired to obtain a film having a thickness of 50 nm.
Were formed respectively.

Subsequently, each of the films was exposed with a high-pressure mercury lamp (main wavelength: 365 nm) at an irradiation amount of 5000 mj.

Thereafter, the coating solution 5 was applied on the exposed film by a spin coater to form a 100 nm thin film.

Finally, as an upper electrode, LiF was 0.5 nm and aluminum was 1
A 50 nm mask was deposited.

Next, light emission was observed by driving the Al electrode on the ITO electrode as an address electrode.

Table 1 shows the voltages and luminous efficiencies at 100 cd emission of the devices made by adding the metal salts of A to HH. Also, as Ref, the light emission characteristics of the device without addition of the metal salt are shown.

As can be seen from Table 1, it can be seen that the addition of the metal salt reduces the applied voltage at 100 cd emission and improves the luminous efficiency. The degree of the efficiency improvement and applied voltage decrease depends on the type of the added metal salt. different. In particular, from Table 1,
It can be seen that there is no difference in the tendency between nitrate, chloride and lactate, which contributes as a negative ion during dissolution, but there is a large difference in the improvement in characteristics due to each metal ion which contributes as a positive ion. From Table 1, it can be considered that iron ions and copper ions contribute significantly to the improvement of the luminous efficiency and the reduction of the applied voltage particularly at the time of 100 cd light emission.

Table 1 Voltage and Luminous Efficiency at 100 cd Light Emission Metal Salt Voltage (v) Luminous Efficiency (lm / W) Metal Salt Voltage (v) Luminous Efficiency (lm / W) Ref 6.4 3.8 R 5.4 5.2 A 5.2 6.0 S 6.0 4.3 B 5.1 6.1 T 5.3 5.3 C 5.4 4.9 U 6.1 4.1 D 6.3 4 4.4 V 6.1 4.0 E 5.8 4.6 W 5.6 5.1 F 6.3 4.2 X 5.8 4.7 G 6.2 4.4 Y 6.1 4.1 . 1 H 5.4 4.8 Z 5.9 4.7 I 6.2 4.0 AA 6.3 4.0 J 6.2 4.0 BB 6.4 3.9 K 6.3 3.9 CC 6.4 3.9 L 6.4 3.9 DD 6.4 3.8 M 5.6 4.6 EE 6.3 3.9 N 5.4 5.0 FF 6.0 4.4 O 6.2 4.1 GG 6.2 4.0 P 6.4 3.9 HH 5.6 4.9 Q 6.2 4.1

[0103]

According to the present invention, it is possible to provide an EL element having both ease of patterning at the time of manufacture and excellent light emission characteristics, and a method of manufacturing the same.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an example of the EL device of the present invention.

FIG. 2 is a graph showing luminance-voltage characteristics of the EL element of Example 1.

FIG. 3 is a graph showing luminance-voltage characteristics of the EL element of Example 2.

FIG. 4 is a graph showing luminous efficiency-voltage characteristics of the EL element of Example 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base | substrate 2 1st electrode 3 Photocatalyst containing layer 3 'photocatalyst containing layer (wetting change part) 4 EL layer 5 EL layer 6 2nd electrode

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05B 33/22 H05B 33/22 D

Claims (21)

[Claims] An EL element comprising at least a base, a first electrode formed on the base, an EL layer formed on the first electrode, and a second electrode formed on the EL layer. An EL device, wherein at least one photocatalyst-containing layer is formed at any position between the base and the second electrode, wherein the photocatalyst-containing layer contains a luminescent property improving substance. 2. The EL device according to claim 1, wherein at least one insulating layer is partially formed on the photocatalyst-containing layer. 3. The photocatalyst-containing layer, wherein at least one insulating layer made of a material containing a photocurable resin or a thermosetting resin is partially formed, and the insulating layer portion is a non-light emitting portion. 3. The EL device according to 2. 4. The luminescent property improving substance comprises a metal salt,
The EL device according to claim 1. 5. The luminescent property improving substance is Fe or Cu.
The EL device according to claim 1, comprising a metal salt of (1). 6. An EL device according to claim 1, wherein
Full color display. 7. A substrate, a first electrode formed on the substrate, a photocatalyst-containing layer formed on the first electrode and containing a light-emitting property improving substance, and an E-layer formed on the photocatalyst-containing layer.
A method for manufacturing an EL element comprising at least an L layer and a second electrode formed on the EL layer, comprising: forming the first electrode on the base; and forming the photocatalyst on the first electrode. Forming a pattern containing a photocatalyst-containing layer, exposing the photocatalyst-containing layer in a pattern, and forming a pattern based on a difference in wettability; applying an EL layer forming liquid on the exposed portion of the photocatalyst-containing layer. A method for manufacturing an EL element, comprising: forming the patterned EL layer; and forming the second electrode on the EL layer. 8. A photocatalyst comprising a base, a first electrode formed on the base, a first EL layer formed on the first electrode, and a luminescent property improving substance formed on the first EL layer. A method for manufacturing an EL element comprising at least a layer containing a second EL layer formed on the photocatalyst containing layer, and a second electrode formed on the second EL layer, wherein the first electrode is formed on the substrate. Forming the first EL layer on the first electrode; forming the photocatalyst-containing layer on the first EL layer; and exposing the photocatalyst-containing layer in a pattern. Forming a pattern based on the difference in wettability, applying the second EL layer forming solution on the exposed portion of the photocatalyst-containing layer to form the patterned second EL layer, Forming the second electrode on a layer That process, a manufacturing method of an EL element including the capital. 9. A base, a photocatalyst-containing layer formed on the base and containing a light-emitting property improving substance, a first electrode formed on the photocatalyst-containing layer, and an E formed on the first electrode.
A method for manufacturing an EL element comprising at least an L layer and a second electrode formed on the EL layer, comprising: forming the photocatalyst-containing layer on the substrate; and exposing the photocatalyst-containing layer in a pattern. Forming a pattern based on the difference in wettability, applying the first electrode forming liquid on the exposed portion of the photocatalyst-containing layer, and forming the patterned first electrode; A method for manufacturing an EL element, comprising: a step of forming the EL layer on a first electrode; and a step of forming the second electrode on the EL layer. 10. A base, a first electrode formed on the base, an EL layer formed on the first electrode, and the EL
A method for manufacturing an EL element comprising at least a photocatalyst-containing layer containing a light-emitting property improving substance formed on a layer, and a second electrode formed on the photocatalyst-containing layer, wherein the first electrode is provided on the base. Forming, forming the EL layer on the first electrode, forming the photocatalyst-containing layer on the EL layer, exposing the photocatalyst-containing layer in a pattern, and Manufacturing an EL element, comprising: a step of forming a pattern due to a difference in gender; and a step of applying the second electrode forming liquid on an exposed portion of the photocatalyst-containing layer to form the patterned second electrode. Method. 11. The solvent for the EL layer forming liquid is a polar solvent, and the application of the EL layer forming liquid is performed by spin coating, ink jetting, dip coating, blade coating, or dropping onto the photocatalyst containing layer. The method for manufacturing an EL device according to claim 7, which is performed by a selected method. 12. The method according to claim 12, wherein the solvent of the second EL layer forming liquid is a polar solvent, and the application of the second EL layer forming liquid is performed by a spin coating method, an ink jet method, a dip coating method, a blade coating method, or a method for coating the photocatalyst containing layer. The method for manufacturing an EL element according to claim 8, wherein the method is performed by a method selected from dropping. 13. The method of claim 1, wherein the solvent of the first electrode forming liquid is a polar solvent, and the first electrode forming liquid is applied by a spin coating method, an ink jet method, a dip coating method, a blade coating method, and The method for manufacturing an EL device according to claim 9, wherein the method is performed by a method selected from dropping. 14. The method according to claim 1, wherein the solvent of the second electrode forming liquid is a polar solvent, and the application of the second electrode forming liquid is performed by a spin coating method, an ink jet method, a dip coating method, a blade coating method, and The method for manufacturing an EL element according to claim 10, wherein the method is performed by a method selected from dropping. 15. A method of patterning the EL layer after applying the EL layer forming liquid, a method of inclining a substrate before solidifying the EL layer forming liquid, a method of blowing air, and a method of sticking and peeling off an adhesive tape after solidification. The method for manufacturing an EL element according to claim 7, wherein the method is performed by a method selected from the group consisting of: 16. The second EL after applying the second EL layer forming liquid.
The method according to claim 8, wherein the patterning of the L layer is performed by a method selected from a method of inclining the substrate before solidifying the second EL layer forming liquid, a method of blowing air, and a method of sticking and peeling an adhesive tape after solidification. Manufacturing method of EL element. 17. A method of patterning the first electrode after the application of the first electrode forming liquid, the method of inclining the substrate before solidifying the first electrode forming liquid, the method of blowing air, and the step of applying an adhesive tape after the solidification. The method for manufacturing an EL element according to claim 9, wherein the method is performed by a method selected from a method of peeling the EL element. 18. The patterning of the second electrode after the application of the second electrode forming liquid is performed by a method of inclining a substrate before solidifying the second electrode forming liquid, a method of blowing air, and an adhesive tape after solidifying. The method for manufacturing an EL element according to claim 10, wherein the method is performed by a method selected from methods of peeling off. 19. The photocatalyst-containing layer according to any one of claims 7 to 10, wherein a portion not irradiated with light has water repellency and / or oil repellency, but a portion irradiated with light improves wettability. 13. The method for producing an EL device according to item 9. 20. The method for manufacturing an EL device according to claim 7, wherein said luminescent property improving substance comprises a metal salt. 21. The EL element according to claim 7, wherein the EL element is a display of a full color display, and pixels of the display are formed corresponding to a pattern due to a difference in wettability of the photocatalyst containing layer. Manufacturing method.