Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
  • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
  • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
  • C09D179/02—Polyamines
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
  • C08G73/02—Polyamines
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
  • C08G73/02—Polyamines
  • C08G73/026—Wholly aromatic polyamines
  • C08G73/0266—Polyanilines or derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/24—Electrically-conducting paints
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
  • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
  • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
  • H01B1/122—Ionic conductors
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
  • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
  • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
  • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
  • H01B1/124—Intrinsically conductive polymers
  • H01B1/128—Intrinsically conductive polymers comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes

Definitions

• the present invention relates to an organic conductive material and a conductive penis formed by forming a salt from an oligomeric derivative of a ⁇ -conjugated organic substance soluble in an organic solvent or water at a high concentration and an acid.
• the solution in which the organic conductive material is dissolved or dispersed can be used as a conductive varnish that can be applied by a method such as dip coating or spin coating.
• the obtained conductive varnish containing the organic conductive material of the present invention can be used as a charge injection auxiliary layer of an organic electroluminescence (hereinafter abbreviated as EL) element, an organic electrode on a dielectric of a capacitor, and a capacitor. It is useful for forming thin and thick organic conductive layers such as electrode materials.
• Background art an organic electroluminescence
• the present applicant has found an organic solution-based charge-transporting varnish using a low-molecular-weight oligoaniline-based material, and exhibits excellent EL element characteristics by inserting a hole injection layer obtained by using the varnish. (See Japanese Patent Application Laid-Open No. 2002-151,272).
• an object of the present invention is to provide an organic conductive material which can be dissolved in an organic solvent and water at a high concentration, a conductive varnish containing the conductive material, and an organic EL device using the same.
• the present inventors have conducted intensive studies in order to achieve the above object, and as a result, have found that a substance obtained by doping a reduced form of ananiline ligomer with an acid is effective for dissolution at an extremely high concentration.
• a reduced form of an oligoaniline derivative the general formula
• the present invention is based on the above findings and provides the following organic conductive material, conductive varnish, conductive thin film, and organic EL device.
• R 4 to RU are each independently a hydrogen atom, a hydroxyl group, an unsubstituted or substituted monovalent hydrocarbon group, an organooxy group, an acyl group or a sulfonate group.
• m and n are independently positive integers of 1 or more, satisfying m + n ⁇ 20 I do. )
• An organic conductive material comprising an oligoaniline derivative represented by the formula: quinoimine, which is an oxidized product formed during synthesis, reduced with a reducing agent to form a salt with an electron-accepting dopant.
• R 1 and R 2 in the general formula (1) are a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or an alkoxy group having 1 to 20 carbon atoms, wherein the organic conductive material according to the above [1]. .
• a conductive varnish containing up to 80% by weight is a conductive varnish containing up to 80% by weight.
• FIG. 1 is a focal micrograph (magnification: x20) of the coated surface obtained in Example 2.
• FIG. 2 is a focus micrograph (magnification: x20) of the coated surface obtained in Comparative Example 2.
• FIG. 3 is an optical micrograph (magnification: x50) of the EL light-emitting surface obtained in Example 3, in which bright areas indicate the light-emitting surface.
• FIG. 4 is an optical micrograph (magnification: x50) of the EL light-emitting surface obtained in Comparative Example 4, in which bright areas indicate the light-emitting surface.
• the oligoaniline derivative has the following general formula
• ⁇ 3 each independently represent a hydrogen atom, an unsubstituted or substituted monovalent hydrocarbon group, an organooxy group or an acyl group, and A and B each independently represent the following general formula: (2) or (3)
• each of R 4 to R is independently a hydrogen atom, a hydroxyl group, an unsubstituted or substituted monovalent hydrocarbon group, an organooxy group, an acyl group or a sulfonate group.
• m and n are each independently one or more positive numbers, and satisfy m + n ⁇ 20.
• the method for synthesizing the oligoaniline derivative represented by the formula (1) in the present invention is not particularly limited.
• a method of subjecting an aromatic amine and a phenol to a condensation reaction by a dehydration condensation reaction, or a method of synthesizing an aromatic amine In general, a method of reacting a compound with an aromatic amine hydrochloride in a molten state is used.
• the substituents R 1 to R 3 of the oligoaniline derivative used in the present invention are each independently a hydrogen atom, an unsubstituted or substituted monovalent hydrocarbon group, an organooxy group or an acyl group.
• the monovalent hydrocarbon group and the organooxy group preferably have 1 to 20 carbon atoms, and the acyl group preferably has 2 to 20 carbon atoms.
• Specific examples of the monovalent hydrocarbon group include alkyl groups such as methyl group, ethyl group, propyl group, butyl group, t-butyl group, hexyl group, octyl group, and decyl group, cyclopentyl group, and cyclohexyl group.
• a cycloalkyl group such as a cycloalkyl group, a bicycloalkyl group such as a bicyclohexyl group, a vinyl group, a 1-propenyl group, a 2-propenyl group, an isopropyl group, a 1-methyl-2-propenyl group, 1-, 2- or 3-butenyl group, hexenyl group, etc., alkenyl group, phenyl group, xylyl group, tolyl group, biphenyl group, aryl group such as naphthyl group, benzyl group, phenylethyl group, phenylcyclohexyl group, etc. And those in which part or all of the hydrogen atoms of these monovalent hydrocarbon groups are substituted with an octane atom, a hydroxyl group, an alkoxy group, or the like. Door can be.
• organooxy group examples include an alkoxy group, an alkenyloxy group, and an aryloxy group.
• alkyl group, the alkenyl group, and the aryl group examples include the same as those described above.
• Examples of the acryl group include those having 2 to 10 carbon atoms, such as an acetyl group, a propionyl group, a butyryl group, an isoptyryl group and a benzoyl group.
• R 1 and R 2 a hydrogen atom, an alkyl group or an alkoxy group having 1 to 20 carbon atoms, more preferably an alkyl group or an alkoxy group having 1 to 4 carbon atoms, or an alkyl group or an alkoxy group having 1 to 4 carbon atoms, respectively.
• a phenyl group, a cyclohexyl group, a cyclopentyl group, a piphenyl group, a bicyclohexyl group or a phenylcyclohexyl group which may have a group, and particularly preferably an alkyl group or an alkoxy group.
• R 3 is preferably a hydrogen atom or an aryl group.
• a phenyl group is particularly preferred as the aryl group.
• the substituents R 4 to RU are each independently a hydrogen atom, a hydroxyl group, an unsubstituted or substituted monovalent hydrocarbon group, an organooxy group, an acyl group or a sulfonic acid group, and an unsubstituted or substituted monovalent hydrocarbon group.
• the organooxy group has 1 to 20 carbon atoms
• the acyl group is preferably one having 2 to 20 carbon atoms, and examples thereof include the same ones as described for R 1 .
• the substituents R 4 to R are preferably a hydrogen atom, an alkyl group, an alkoxy group, an alkoxyalkyl group, an alkenyl group, an acyl group, a sulfonic acid group, a hydroxyl group, or an alkyl group or an alkoxy group each having 1 to 4 carbon atoms.
• a phenyl group, a cyclohexyl group, a cyclopentyl group, a biphenyl group, a bicyclohexyl group, or a phenylcyclohexyl group which may have the following substituents:
• 4 to! ⁇ 11 are a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, and an alkoxy group having 1 to 20 carbon atoms, and An alkoxyalkyl group having 1 to 20 carbon atoms, a alkenyl group having 2 to 4 carbon atoms, an acyl group having 2 to 4 carbon atoms, a benzoyl group, a sulfonic acid group, a hydroxyl group,
• the substituent is an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms), a phenyl group, a cyclohexyl group, a cyclopentyl group, a biphenyl group, a bicyclohexyl group which may have Or a phenylcyclohexyl group.
• a hydrogen atom an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkoxyalkyl group having 1 to 4 carbon atoms and 1 to 4 carbon atoms in the alkyl group, Vinyl group, 2-propenyl group, acetyl group, benzoyl group, sulfonic acid group, hydroxyl group, each substituent (the substituent is an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms) And a phenyl group, a cyclohexyl group, a biphenyl group, a bicyclohexyl group or a phenylcyclohexyl group which may have
• the number of m and n in the oligoaniline moiety is independently 1 or more positive number.
• m + n is preferably 20 or less.
• the concentration is preferably 10 or less, particularly preferably 5 or less.
• the obtained aniline oligomer is washed with an organic solvent, such as washing with toluene and ether, and then dried to obtain silver crystals.
• the crystals are subjected to a reducing operation to further improve their solubility.
• the reduction operation is not particularly limited.
• a compatible organic solvent capable of dissolving the crystals such as dioxane, or a reducing agent such as hydrazine is added to silver crystals, and an inert gas such as nitrogen is added to the reaction system.
• the reducing agent hydrazine or the like
• the amount of the reducing agent used is 0.1 to 10 parts by weight, particularly 0.5 to 100 parts by weight, based on 100 parts by weight of the oligoaniline derivative to be purified. 2 parts by weight.
• the compatible organic solvent include dioxane, tetrahydrofuran, N, N-dimethylformamide, N, N-dimethylacetamide, and N-methylpyrrolidone.
• the incompatible organic solvent include toluene, ether, and xylene. Benzene, chlorobenzene, dichlorobenzene, dichloromethane, dichloroethane, chloroform, hexane, heptane and the like.
• the oligoaniline derivative of the present invention represented by the general formula (1) obtained by the above-described production method is to form a salt with an electron-accepting dopant.
• the acid is represented by the general formula (4)
• D represents a benzene ring, a naphthalene ring, an atracene ring, a phenanthrene ring or a heterocyclic ring.
• a sulfonic acid derivative which easily causes an intermolecular interaction represented by Examples of such a dopant include a sulfosalicylic acid derivative.
• Doping concentration depends on molecular weight of oligoaniline derivative However, it is generally preferable to add the dopant so as to be one or less, more preferably 0.2 to 1 dopant per nitrogen atom in the oligoaniline derivative.
• the solvent used for preparing the varnish containing the oligoaniline derivative is not particularly limited as long as the solvent dissolves the oligoaniline derivative.
• Specific examples of these solvents include organic solvents such as N-methylpyrrolidone, N, N-dimethylacetamide, N, N-dimethylformamide, and water. These may be used alone or as a mixture.
• the method of adding the dopant is not particularly limited.
• the oligoaniline derivative is added to a solvent such as DMF in an inert gas stream such as nitrogen and dissolved sufficiently, while the nitrogen atom contained in the oligoaniline derivative is dissolved.
• a doped oligoaniline solution can be easily obtained.
• heating during doping the doping can be made to proceed more reliably.
• the solvent may be added to the solvent capable of dissolving the oligoaniline derivative as long as the solvent can be uniformly dissolved.
• examples thereof include ethyl sorbitol, butyl sorb, ethyl carbitol, butyl carbitol, ethyl carbitol acetate, and ethyl glycol.
• the concentration of the oligoaniline derivative in the solution can be controlled at 1 to 80% by weight, particularly 1 to 50% by weight.
• This solution is applied onto a substrate, and the solvent is evaporated to form an oligoaniline derivative coating film on the substrate.
• the temperature at this time may be such that the solvent evaporates, and usually 80 to 200 ° C is sufficient.
• Examples of a coating method for forming the oligoaniline derivative thin film of the present invention include a die coating method, a spin coating method, a transfer printing method, a roll coating method, and a brush coating method, but are not particularly limited. .
• the obtained thin film is oxidized by being sufficiently baked in the presence of oxygen to form a quinoimine structure, thereby improving the conductivity.
• the thickness of the conductive thin film obtained by coating and evaporating operations is particularly limited However, when used as a charge injection layer in an organic EL device, the thickness is preferably 5 to 200 nm.
• a method of changing the film thickness there are a method of changing a solid concentration in a varnish, a method of changing a solution amount on a substrate at the time of coating, and the like.
• the method for producing an OLED element using the conductive varnish of the present invention and the materials used are, for example, as follows, but are not limited thereto.
• the electrode substrate to be used is previously purified by liquid washing with a detergent, alcohol, pure water, or the like, and that the anode substrate is subjected to surface treatment such as ozone treatment or oxygen-plasma treatment immediately before use.
• surface treatment such as ozone treatment or oxygen-plasma treatment immediately before use.
• the anode material is mainly composed of an organic material, the surface treatment may not be performed.
• a conductive thin film is formed on the electrode by the above method. This is introduced into a vacuum evaporation apparatus, and a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode metal are sequentially deposited to form an OLED element.
• a carrier block layer may be provided between any layers for controlling the light emitting region.
• Anode materials include indium tin oxide (ITO) and indium zinc oxide (IZ).
• ⁇ ) and a transparent electrode typified by) are preferred.
• Polythiophene derivatives and polyanilines having high charge transportability can also be used.
• Materials for forming the hole transport layer include (triphenylamine) dimer derivative (TPD), ( ⁇ -naphthyldiphenylamine) dimer (a-NPD), and C (triphenylamine) dimer] spirodimer Triarylamines such as i- (Spiro-TAD), 4, 4 ', 4' '-tris [3-methylphenyl (phenyl) amino] triphenylamine (m-MTDATA), 4,4,, 4 ,,,-Tris [1-naphthyl (phenyl) amino] Starburst amines such as triphenylamine (1-TNA TA) and 5,5,,-bis- ⁇ 4-[bis (4-methylphenyl) amino ] Phenyl ⁇ -2,2,, 5,, 2,, —Olithiophenes such as terthiophene (BMA-3T).
• TPD triphenylamine dimer derivative
• a-NPD ⁇ -naphth
• Tris (8-quinolinolate) aluminum (III) (A 1 q 3 ), bis (8-quinolinolate) zinc (II) (Zn q 2 ), bis (2-methyl-18-quinolinolate) (p-phenylphenolate) aluminum (III) (BA l Q) and 4,4'-bis (2,2-diphenylvinyl) biphenyl (DPVBi).
• the light emitting layer may be formed by co-evaporating an electron transporting material or a hole transporting material and a luminescent dopant. Examples of electron transport materials include A 1 Q 3 , BA 1 Q, DPVB i, (2- (4-biphenyl) -15- (4-t-butylphenyl) -1,3,4-oxaziazol)
• PBD triazole derivatives
• TEZ bathocuproine
• BCP bathocuproine
• Luminescent dopants include quinacridone, rubrene, coumarin 540, 4- (dicyanomethylene) -12-methyl-6- (p-dimethylaminostyryl) -14H-pyran (DCM), tris (2-phenylviridine) Iridium (III) (I r (ppy) 3 ) and (1,10-phenanthroline) tris (4,4,4-trifluoro-11- (2-chenyl) -butane-1,3-dionate) Mouth pium (III) (Eu (TTA) 3 phen) and the like.
• Materials for forming the carrier block layer include PBD, TAZ, and BCP.
• lithium oxide Li i 2 ⁇
• magnesium oxide Mg O
• alumina A 1 2 0 3
• lithium fluoride Li F
• fluoride Maguneshiu arm MgF 2
• fluoride strontium S r F 2
• L i Q Li Q
• L i acac
• lithium lithium acetate lithium acetate and benzoic acid and the like.
• cathode material examples include aluminum, magnesium-silver alloy, aluminum-lithium alloy, lithium, sodium, potassium, and cesium.
• the method for producing a PLED device using the charge-transporting varnish of the present invention is not particularly limited, and includes the following methods.
• the conductive varnish of the present invention is formed by forming a luminescent charge transporting polymer layer instead of performing a vacuum deposition operation of a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer.
• a PLED device including a conductive thin film formed by the method can be manufactured. Specifically, use the conductive varnish on the anode substrate. Then, a conductive thin film is formed on the electrode by the above-described method, a luminescent charge transporting polymer layer is formed thereon, and a cathode electrode is deposited thereon to form a PLED element.
• a method for forming the luminescent charge transporting polymer layer is to dissolve or uniformly disperse the luminescent charge transporting polymer material or a material obtained by adding a luminescent dopant to the luminescent charge transporting polymer material. After applying the conductive thin film to the electrode substrate on which the conductive thin film is formed, a method of forming a film by evaporating a solvent can be given.
• luminescent charge-transporting polymer material examples include polyfluorene derivatives such as poly (9,9-dialkylfluorene) (PDAF) and poly (2-methoxy-5- (2'-ethylhexoxy))-1 Polyphenylenevinylene derivatives such as 1,4-phenylenevinylene) (MEH-PPV), polythiophene derivatives such as poly (3-alkylthiophene) (PAT), and polyvinylcarbazole (PVCz). Can be.
• polyfluorene derivatives such as poly (9,9-dialkylfluorene) (PDAF) and poly (2-methoxy-5- (2'-ethylhexoxy))-1
• Polyphenylenevinylene derivatives such as 1,4-phenylenevinylene) (MEH-PPV)
• polythiophene derivatives such as poly (3-alkylthiophene) (PAT)
• PVCz polyvinylcarbazole
• Examples of the solvent include toluene, xylene, and cross-linked form.
• Examples of the dissolving or uniform dispersion method include a method of dissolving or uniformly dispersing by a method such as stirring, heating and stirring, and ultrasonic dispersion.
• the coating method is not particularly limited, and examples thereof include a dip coating method, a spin coating method, a transfer printing method, a roll coating method, and a brush coating method. It is desirable to apply under an inert gas such as nitrogen or argon.
• Examples of the solvent evaporation method include a method of heating in an oven or a hot plate under an inert gas or in a vacuum.
• the obtained white crystals were doped with 5-sulfosalicylic acid as a dopant under the conditions shown in Table 1, and a varnish was prepared using DMF as a solvent.
• Comparative Example 1 62 seconds As shown in Table 2, the presence of particles was confirmed at a concentration of 5% by weight in the varnish not subjected to the reduction treatment in Comparative Example 1, indicating that the amount of completely dissolved varnish was small.
• a conductive thin film having a film thickness of 40 nm was obtained by the method described in Example 2.
• Fig. 2 shows a laser confocal micrograph of this thin film. Compared to Fig. 1, it can be seen that the coating film is non-uniform due to undissolved particles.
• a conductive varnish described in Run No. 4 in Table 1 was applied on the ITO glass substrate that had been washed with ozone for 40 minutes by spin coating, and baked on a hot plate at 180 ° C for 2 hours to obtain 2 Onm. Was formed. After that, the substrate was introduced into a vacuum evaporation apparatus, and a (hynaphthyldiphenylamine) dimer (a-NPD) was added. Tris (8-quinolinolate aluminum (III) (A 1 Q 3 ), Li F, and A 1 were sequentially deposited. The film thicknesses were 4 Onm, 60 nm, 0.5 nm, and 100 nm, respectively.
• the vapor deposition operation was performed after reaching a pressure of 4 Pa or less, and the vapor deposition rate was 0.3 to 0.4 nmZs excluding LiF, and 0.02 to 0.004 nm for Otsu 1?
• the transfer operation during the vapor deposition operation was performed in a vacuum Table 3 shows the characteristics of the obtained organic electroluminescent device, and FIG.
• Example 3 shows the characteristics of the obtained organic EL device.
• Fig. 4 shows a photograph of the light emitting surface. As shown in Table 3, the characteristics of the organic EL device obtained by the present invention are excellent. Comparing the light emitting surface photographs of FIGS. 3 and 4, the emission surface of the organic EL device of the present invention (FIG. 3) It turns out that it is uniform.
• Example 3 8.0 0.090 28.6 3.92
• Example 3 10.0 0.729 199.1 4.20 Comparative Example 3 8.0 2.32 1.0 1.11 Comparative Example 3 10.0 4.74 95.3 4.11
• Example 4
• the 4,4'-diaminodiphenylamine sulfate was desalted by recrystallization in an excess aqueous sodium hydroxide solution to obtain 4,4'-diaminodiphenylamine (DADPA).
• DADPA 4,4'-diaminodiphenylamine
• phenylpenylaniline Phenylpenaniline was dissolved in DMF solvent and doped with sulfosalicylic acid.
• Table 4 shows the doping amount and varnish preparation conditions. Table 4
• the oligoaniline derivative used in the present invention is easy to synthesize, and is used as one of the raw materials, and has excellent heat resistance, film strength, and film properties, and has antistatic properties or low charge accumulation. A film having properties is obtained.
• Such a reduced form of the oligoaniline derivative is excellent in solubility, and can provide a conductive varnish containing the organic conductive material of the present invention in which the oligoaniline derivative is doped at a high concentration. It can be used to form a thin to thick organic conductive layer such as a charge injection auxiliary layer of an organic EL element, an organic electrode and a capacitor electrode material on a dielectric material of a capacitor.

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