WO2016117521A1 - 電荷輸送性薄膜形成用ワニス - Google Patents
電荷輸送性薄膜形成用ワニス Download PDFInfo
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- WO2016117521A1 WO2016117521A1 PCT/JP2016/051340 JP2016051340W WO2016117521A1 WO 2016117521 A1 WO2016117521 A1 WO 2016117521A1 JP 2016051340 W JP2016051340 W JP 2016051340W WO 2016117521 A1 WO2016117521 A1 WO 2016117521A1
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- carbon atoms
- thin film
- charge transporting
- varnish
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- 0 Cc1cccc2c1[n](*)c1c2cccc1 Chemical compound Cc1cccc2c1[n](*)c1c2cccc1 0.000 description 10
- JPHHCZIPLMZCJK-UHFFFAOYSA-N CC(C)c(cc1)ccc1NC(C)c(cc1)ccc1N Chemical compound CC(C)c(cc1)ccc1NC(C)c(cc1)ccc1N JPHHCZIPLMZCJK-UHFFFAOYSA-N 0.000 description 2
- WYHBENDEZDFJNU-UHFFFAOYSA-N Cc(cc1)c(C)cc1F Chemical compound Cc(cc1)c(C)cc1F WYHBENDEZDFJNU-UHFFFAOYSA-N 0.000 description 2
- AAIJEURQKZASKQ-UHFFFAOYSA-N Cc(cc1)cc(C)c1F Chemical compound Cc(cc1)cc(C)c1F AAIJEURQKZASKQ-UHFFFAOYSA-N 0.000 description 2
- WJAVYWPXOXAOBS-UHFFFAOYSA-N Cc1cc(F)c(C)cc1 Chemical compound Cc1cc(F)c(C)cc1 WJAVYWPXOXAOBS-UHFFFAOYSA-N 0.000 description 2
- YWGNCVHDLLWVDW-UHFFFAOYSA-N CC(C)(C)c1ccc(C(C)(C)Nc2cccc3c2cccc3)cc1 Chemical compound CC(C)(C)c1ccc(C(C)(C)Nc2cccc3c2cccc3)cc1 YWGNCVHDLLWVDW-UHFFFAOYSA-N 0.000 description 1
- DIMFULHQUWADPG-UHFFFAOYSA-N CC(c(cc1)ccc1N)Nc1ccccc1 Chemical compound CC(c(cc1)ccc1N)Nc1ccccc1 DIMFULHQUWADPG-UHFFFAOYSA-N 0.000 description 1
- NAMNILDBAVIWNM-UHFFFAOYSA-N CCC(C)(C)c1ccc(C(C)(C)Nc(cc2)cc3c2c(cccc2)c2cc3)cc1 Chemical compound CCC(C)(C)c1ccc(C(C)(C)Nc(cc2)cc3c2c(cccc2)c2cc3)cc1 NAMNILDBAVIWNM-UHFFFAOYSA-N 0.000 description 1
- WRWPPGUCZBJXKX-UHFFFAOYSA-N Cc(cc1)ccc1F Chemical compound Cc(cc1)ccc1F WRWPPGUCZBJXKX-UHFFFAOYSA-N 0.000 description 1
- FKBGOMKXPDJKFC-UHFFFAOYSA-N Cc(cc1)ccc1N(c1cc2ccccc2cc1)c1cc2ccccc2cc1 Chemical compound Cc(cc1)ccc1N(c1cc2ccccc2cc1)c1cc2ccccc2cc1 FKBGOMKXPDJKFC-UHFFFAOYSA-N 0.000 description 1
- YIRWXQVURQQONF-UHFFFAOYSA-N Cc(cc1)ccc1N(c1cc2ccccc2cc1)c1cccc2c1cccc2 Chemical compound Cc(cc1)ccc1N(c1cc2ccccc2cc1)c1cccc2c1cccc2 YIRWXQVURQQONF-UHFFFAOYSA-N 0.000 description 1
- MMZYCBHLNZVROM-UHFFFAOYSA-N Cc(cccc1)c1F Chemical compound Cc(cccc1)c1F MMZYCBHLNZVROM-UHFFFAOYSA-N 0.000 description 1
- AZCXNRJHTGDURM-UHFFFAOYSA-N Cc(cccc1)c1N(c1cc2ccccc2cc1)c1cc2ccccc2cc1 Chemical compound Cc(cccc1)c1N(c1cc2ccccc2cc1)c1cc2ccccc2cc1 AZCXNRJHTGDURM-UHFFFAOYSA-N 0.000 description 1
- PBHABHFBLQREQG-UHFFFAOYSA-N Cc(cccc1)c1N(c1cc2ccccc2cc1)c1cccc2c1cccc2 Chemical compound Cc(cccc1)c1N(c1cc2ccccc2cc1)c1cccc2c1cccc2 PBHABHFBLQREQG-UHFFFAOYSA-N 0.000 description 1
- BTQZKHUEUDPRST-UHFFFAOYSA-N Cc1cc(F)ccc1 Chemical compound Cc1cc(F)ccc1 BTQZKHUEUDPRST-UHFFFAOYSA-N 0.000 description 1
- BRGJNXMDVQYSLL-UHFFFAOYSA-N Cc1cccc(N(c2cc3ccccc3cc2)c2cc3ccccc3cc2)c1 Chemical compound Cc1cccc(N(c2cc3ccccc3cc2)c2cc3ccccc3cc2)c1 BRGJNXMDVQYSLL-UHFFFAOYSA-N 0.000 description 1
- AQKWSWAUVSJTJF-UHFFFAOYSA-N Cc1cccc(N(c2cc3ccccc3cc2)c2cccc3c2cccc3)c1 Chemical compound Cc1cccc(N(c2cc3ccccc3cc2)c2cccc3c2cccc3)c1 AQKWSWAUVSJTJF-UHFFFAOYSA-N 0.000 description 1
- ATGUVEKSASEFFO-UHFFFAOYSA-N Nc(cc1)ccc1Nc1ccccc1 Chemical compound Nc(cc1)ccc1Nc1ccccc1 ATGUVEKSASEFFO-UHFFFAOYSA-N 0.000 description 1
- KIHQWOBUUIPWAN-UHFFFAOYSA-N Nc1cc(cccc2)c2c2c1cccc2 Chemical compound Nc1cc(cccc2)c2c2c1cccc2 KIHQWOBUUIPWAN-UHFFFAOYSA-N 0.000 description 1
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
- H01B1/121—Charge-transfer complexes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3435—Piperidines
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L65/00—Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Compositions of derivatives of such polymers
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- 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
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
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- 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
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- C09D181/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur, with or without nitrogen, oxygen, or carbon only; Coating compositions based on polysulfones; Coating compositions based on derivatives of such polymers
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- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- 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
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
Definitions
- the present invention relates to a varnish for forming a charge transporting thin film.
- a charge transporting thin film made of an organic compound is used as a light emitting layer or a charge injection layer.
- the method for forming the charge transporting thin film is roughly classified into a dry process typified by vapor deposition and a wet process typified by spin coating. Compared with the dry process and the wet process, the wet process can efficiently produce a thin film with a large area and high flatness. Therefore, the thin film is formed by the wet process in a field where a large area of the thin film such as an organic EL is desired. Often formed.
- the present invention has been made in view of the above circumstances, and shows a high charge transport property even when fired at a low temperature.
- An object of the present invention is to provide a varnish for forming a charge transporting thin film containing a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative capable of reducing a driving voltage and improving luminance characteristics while maintaining it.
- Another object of the present invention is to provide a method for reducing the driving voltage of an organic EL element, a method for improving luminance, and a method for improving luminance life using such a varnish for forming a charge transporting thin film. To do.
- the present inventors have found that 2,2,6,6-tetraalkylpiperidine-N-oxyl derivatives have excellent solubility in organic solvents and charge transporting substances.
- a charge transporting thin film obtained from a varnish prepared by dissolving it in an organic solvent together with a charge transporting substance as a hole injection layer of an organic EL device the varnish can be cooled at a low temperature.
- the present invention has been completed by finding that the drive voltage can be reduced and the luminance characteristics can be improved without impairing the current efficiency of the element even when the element is fired at a low temperature.
- “baking at a low temperature” means “baking at a temperature of 200 ° C. or lower”.
- a charge transporting thin film forming varnish comprising a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative represented by the formula (T1), a charge transporting substance, and an organic solvent;
- R A independently represents an alkyl group having 1 to 20 carbon atoms
- R B represents a hydrogen atom, a hydroxy group, an amino group, a carboxy group, a cyano group, an oxo group, an isocyanato group, a carbon atom
- An alkoxy group having 1 to 20 carbon atoms, an alkylcarbonyloxy group having 2 to 20 carbon atoms, an arylcarbonyloxy group having 7 to 20 carbon atoms, an alkylcarbonylamino group having 2 to 20 carbon atoms, or an arylcarbonyl having 7 to 20 carbon atoms Represents an amino group.
- a fluoroaryl group having 6 to 20 carbon atoms A fluoroalkyl group having 1 to 20 carbon atoms, a fluorocycloalkyl group having 3 to 20 carbon atoms, a fluorobicycloalkyl group having 4 to 20 carbon atoms, a fluoroalkenyl group having 2 to 20 carbon atoms, or a fluoroalkynyl group having 2 to 20 carbon atoms
- An aryl group having 6 to 20 carbon atoms which may be substituted with a cyano group, a halogen atom or a fluoroalkoxy group having 1 to 20 carbon atoms, Cyano group, chlorine atom, bromine atom, iodine atom, nitro group, fluoroalkoxy group having 1 to 20 carbon atoms, fluoroalkyl group having 1 to 20 carbon atoms, fluorocycloalkyl group having 3 to 20 carbon atoms, 4 to 4 carbon atoms 20 fluorobicyclo
- n 1 represents an integer of 1 to 20.
- a method for producing an organic EL device characterized by using the charge transporting thin film forming varnish according to any one of 12.1 to 8. 13.
- a method for reducing the driving voltage of an organic EL device having a charge transporting thin film manufactured using a charge transporting thin film forming varnish, The charge transporting thin film forming varnish uses any one of 1 to 8 charge transporting thin film forming varnish;
- 14 A method for improving the luminance of an organic EL device having a charge transporting thin film manufactured using a charge transporting thin film forming varnish, The charge transporting thin film forming varnish uses any one of 1 to 8 charge transporting thin film forming varnish; 15.
- a method for improving the luminance life of an organic EL device having a charge transporting thin film produced using a charge transporting thin film forming varnish One of the charge transporting thin film forming varnishes 1 to 8 is used as the charge transporting thin film forming varnish.
- the varnish for forming a charge transporting thin film of the present invention has a high charge transporting property even when baked at a low temperature as compared with the case of using a varnish not containing this or a varnish containing another organic oxidizing agent. Can be obtained. Furthermore, by using the thin film as a hole injection layer, the driving voltage of the organic EL element can be reduced and the luminance characteristics can be improved. Further, the thin film obtained from the varnish for forming a charge transporting thin film of the present invention is expected to be used as an antistatic film, a hole collection layer of an organic thin film solar cell, or the like.
- the charge transporting thin film forming varnish according to the present invention contains a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative represented by the formula (T1).
- R A independently represents an alkyl group having 1 to 20 carbon atoms
- R B represents a hydrogen atom, a hydroxy group, an amino group, a carboxy group, a cyano group, an oxo group, an isocyanato group, a carbon atom
- An alkoxy group having 1 to 20 carbon atoms, an alkylcarbonyloxy group having 2 to 20 carbon atoms, an arylcarbonyloxy group having 7 to 20 carbon atoms, an alkylcarbonylamino group having 2 to 20 carbon atoms, or an arylcarbonyl having 7 to 20 carbon atoms Represents an amino group.
- R A independently represents an alkyl group having 1 to 20 carbon atoms.
- the alkyl group having 1 to 20 carbon atoms may be linear, branched or cyclic.
- the alkyl group is preferably a linear alkyl group having 1 to 20 carbon atoms, more preferably a methyl group or an ethyl group, and most preferably a methyl group.
- R B is a hydrogen atom, a hydroxy group, an amino group, a carboxy group, a cyano group, an oxo group, an isocyanato group, an alkoxy group having 1 to 20 carbon atoms, an alkylcarbonyloxy group having 2 to 20 carbon atoms, or 7 to 20 carbon atoms.
- alkyl moiety of the alkoxy group having 1 to 20 carbon atoms, the alkylcarbonyloxy group having 2 to 20 carbon atoms, and the alkylcarbonylamino group having 2 to 20 carbon atoms include the same alkyl groups as described above.
- the aryl moiety of the arylcarbonyloxy group having 7 to 20 carbon atoms and the arylcarbonylamino group having 7 to 20 carbon atoms includes a phenyl group, a 1-naphthyl group, a 2-naphthyl group, a 1-anthryl group, and a 2-anthryl group. , 9-anthryl group, 1-phenanthryl group, 2-phenanthryl group, 3-phenanthryl group, 4-phenanthryl group, 9-phenanthryl group and the like, and aryl groups having 6 to 20 carbon atoms.
- R B is preferably a hydrogen atom.
- 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative represented by the formula (T1) include 2,2,6,6-tetramethylpiperidine-N-oxyl (hereinafter also referred to as TEMPO). And 2,2,6,6-tetraethylpiperidine-N-oxyl and the like, but is not limited thereto.
- 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative used in the present invention a commercially available product may be used, and known methods (for example, International Publication No. 2014/7144, JP-A-7-278107). JP, 6-100538, JP 2003-55347, J. Am. Chem. Soc., 2006, 128 (26), pp. 8412-8413 and its supporting information) You may use what was synthesize
- the content of the 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative in the varnish of the present invention is 1 to 4 with respect to the charge transporting material (the charge transporting material and the dopant when a dopant is included). It is about 10% by mass, preferably about 3-8% by mass.
- charge transport material included in the varnish for forming a charge transport thin film according to the present invention those used in the field of organic EL and the like can be used.
- Specific examples thereof include oligoamine derivatives, N, N′-diarylbenzidine derivatives, arylamine derivatives such as N, N, N ′, N′-tetraarylbenzidine derivatives, oligothiophene derivatives, thienothiophene derivatives, thienobenzothiophenes.
- charge transporting compounds such as thiophene derivatives such as derivatives and pyrrole derivatives such as oligopyrrole.
- arylamine derivatives and thiophene derivatives are preferable and arylamine derivatives are more preferable because they exhibit excellent dissolution in organic solvents.
- the molecular weight of the charge transporting compound is usually about 200 to 9,500 from the viewpoint of preparing a uniform varnish that gives a thin film with high flatness, but is 300 or more from the viewpoint of obtaining a thin film with more excellent charge transportability. From the viewpoint of preparing a uniform varnish that gives a highly flat thin film with better reproducibility, preferably 8,000 or less, more preferably 7,000 or less, and more preferably 6,000 or less. More preferred is 5,000 or less.
- the charge transporting compound preferably has no molecular weight distribution (dispersity is 1) (that is, preferably has a single molecular weight). ).
- arylamine derivative examples include those represented by the formula (1).
- X 201 represents —NY 201 —, —O—, —S—, — (CR 207 R 208 ) L — or a single bond, and when m 1 or m 2 is 0, , -NY 201 - represents a.
- Y 201 is independently of each other a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkynyl group having 2 to 20 carbon atoms, which may be substituted with Z 201 , or An aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms which may be substituted with Z 202 is represented.
- alkyl group having 1 to 20 carbon atoms examples are the same as those described above.
- alkenyl group having 2 to 20 carbon atoms include ethenyl group, n-1-propenyl group, n-2-propenyl group, 1-methylethenyl group, n-1-butenyl group, n-2-butenyl group, n-3-butenyl group, 2-methyl-1-propenyl group, 2-methyl-2-propenyl group, 1-ethylethenyl group, 1-methyl-1-propenyl group, 1-methyl-2-propenyl group, n- Examples thereof include a 1-pentenyl group, an n-1-decenyl group, and an n-1-eicosenyl group.
- alkynyl group having 2 to 20 carbon atoms examples include ethynyl group, n-1-propynyl group, n-2-propynyl group, n-1-butynyl group, n-2-butynyl group, and n-3-butynyl.
- aryl group having 6 to 20 carbon atoms include phenyl group, 1-naphthyl group, 2-naphthyl group, 1-anthryl group, 2-anthryl group, 9-anthryl group, 1-phenanthryl group, 2-phenanthryl group. Group, 3-phenanthryl group, 4-phenanthryl group, 9-phenanthryl group and the like.
- heteroaryl group having 2 to 20 carbon atoms examples include 2-thienyl group, 3-thienyl group, 2-furanyl group, 3-furanyl group, 2-oxazolyl group, 4-oxazolyl group, 5-oxazolyl group, 3-isoxazolyl group, 4-isoxazolyl group, 5-isoxazolyl group, 2-thiazolyl group, 4-thiazolyl group, 5-thiazolyl group, 3-isothiazolyl group, 4-isothiazolyl group, 5-isothiazolyl group, 2-imidazolyl group, Examples include 4-imidazolyl group, 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, and the like.
- R 207 and R 208 are each independently substituted with a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an aldehyde group, a hydroxy group, a thiol group, a sulfonic acid group, a carboxy group, or Z 201.
- Y 202 to Y 213 are each independently an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms or an alkynyl group having 2 to 20 carbon atoms, which may be substituted with Z 201 , or An aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms which may be substituted with Z 202 is represented.
- Z 201 is a halogen atom, a nitro group, a cyano group, an amino group, an aldehyde group, a hydroxy group, a thiol group, a sulfonic acid group, a carboxy group, or an aryl group having 6 to 20 carbon atoms that may be substituted with Z 203 Represents a group or a heteroaryl group having 2 to 20 carbon atoms.
- Z 202 is a halogen atom, a nitro group, a cyano group, an amino group, an aldehyde group, a hydroxy group, a thiol group, a sulfonic acid group, a carboxy group, or an alkyl group having 1 to 20 carbon atoms that may be substituted with Z 203 Group, an alkenyl group having 2 to 20 carbon atoms or an alkynyl group having 2 to 20 carbon atoms.
- Z 203 represents a halogen atom, a nitro group, a cyano group, an amino group, an aldehyde group, a hydroxy group, a thiol group, a sulfonic acid group, or a carboxy group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- alkyl group, alkenyl group, alkynyl group, aryl group and heteroaryl group of R 207 to R 208 and Y 202 to Y 213 are the same as those described above.
- a hydrogen atom or an alkyl group Z 201 has been having 1 to 20 carbon atoms substituted by are preferred, and a methyl group which may be substituted with a hydrogen atom or Z 201 More preferred are both hydrogen atoms.
- L represents the number of divalent groups represented by — (CR 207 R 208 ) — and is an integer of 1 to 20, preferably 1 to 10, more preferably 1 to 5, and more preferably 1 to 2. Even more preferred, 1 is optimal.
- the plurality of R 207 may be the same as or different from each other, and the plurality of R 208 may be the same as or different from each other.
- X 201 is preferably —NY 201 — or a single bond.
- Y 201 a hydrogen atom or an alkyl group Z 201 has been having 1 to 20 carbon atoms substituted with, more preferably a methyl group which may be substituted with a hydrogen atom or Z 201, hydrogen atom Is the best.
- R 201 to R 206 are each independently substituted with a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, an aldehyde group, a hydroxy group, a thiol group, a sulfonic acid group, a carboxy group, or Z 201.
- R 201 to R 204 may be substituted with a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms which may be substituted with Z 201 , or Z 202.
- An aryl group having 6 to 14 carbon atoms is preferable, a hydrogen atom, a fluorine atom, or an alkyl group having 1 to 10 carbon atoms which may be substituted with a fluorine atom is more preferable, and all hydrogen atoms are optimal.
- R 205 and R 206 are each a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms that may be substituted with Z 201 , or an aryl group having 6 to 14 carbon atoms that may be substituted with Z 202 Or a diphenylamino group optionally substituted by Z 202 (Y 203 and Y 204 are phenyl groups optionally substituted by Z 202 —NY 203 Y 204 group), a hydrogen atom, a fluorine atom Or a diphenylamino group optionally substituted with a fluorine atom, more preferably a hydrogen atom or a diphenylamino group.
- R 201 to R 204 are hydrogen atoms, fluorine atoms, alkyl groups having 1 to 10 carbon atoms that may be substituted with fluorine atoms, and R 205 and R 206 are substituted with hydrogen atoms, fluorine atoms, or fluorine atoms.
- X 201 is —NY 201 — or a single bond
- Y 201 is preferably a hydrogen atom or a combination of methyl groups
- R 201 to R 204 are hydrogen atoms
- R 205 and R 206 are At the same time, a hydrogen atom or a diphenylamino group
- X 201 is more preferably a combination of —NH— or a single bond.
- m 1 and m 2 each independently represent an integer of 0 or more, and satisfy 1 ⁇ m 1 + m 2 ⁇ 20, but the charge transportability of the resulting thin film and the dissolution of the arylamine derivative In consideration of the balance with property, it is preferable to satisfy 2 ⁇ m 1 + m 2 ⁇ 8, more preferably 2 ⁇ m 1 + m 2 ⁇ 6, and more preferably 2 ⁇ m 1 + m 2 ⁇ 4. Even more preferred.
- Z 201 is preferably a halogen atom or an aryl group having 6 to 20 carbon atoms which may be substituted with Z 203 , and is substituted with a halogen atom or Z 203
- An optionally substituted phenyl group is more preferred and optimally absent (ie, unsubstituted).
- Z 202 is a halogen atom, or preferably an alkyl group which may having 1 to 20 carbon atoms optionally substituted by Z 203, halogen atom, or an alkyl group which 1 carbon atoms which may be 1-4 substituted with Z 203 More preferably, not present (ie, unsubstituted) is optimal.
- Z 203 is preferably a halogen atom, more preferably fluorine, and most preferably not (ie, unsubstituted).
- the carbon number of the alkyl group, alkenyl group, and alkynyl group is preferably 10 or less, more preferably 6 or less, and even more preferably 4 or less.
- the carbon number of the aryl group and heteroaryl group is preferably 14 or less, more preferably 10 or less, and even more preferably 6 or less.
- the molecular weight of the arylamine derivative represented by the formula (1) is preferably 9,500 or less, more preferably 8,000 or less, and even more preferably from the viewpoint of ensuring solubility in an organic solvent. It is 7,000 or less, more preferably 6,000 or less, and still more preferably 5,000 or less. Further, from the viewpoint of improving charge transportability, the molecular weight is preferably 300 or more, more preferably 400 or more. From the viewpoint of preventing the charge transporting material from separating when the film is thinned, the arylamine derivative represented by the formula (1) preferably has no molecular weight distribution (dispersity is 1) (that is, a single substance). Preferably having a molecular weight of
- the method for synthesizing the arylamine derivative is not particularly limited, but Bulletin of Chemical Society of Japan, 67, pp. 1749-175275 (1994), Synthetic Metals, 84, pp. 119-120 (1997), Thin Solid Films, 520 (24), pp. 7157-7163, (2012), International Publication No. 2008/032617, International Publication No. 2008/032616, International Publication No. 2008/129947, International Publication No. 2013/084664, etc. The method described is mentioned.
- arylamine derivative represented by the formula (1) include, but are not limited to, those represented by the following formula.
- DPA represents a diphenylamino group.
- Ph represents a phenyl group
- TPA represents a p- (diphenylamino) phenyl group.
- arylamine derivative examples include those represented by the formula (2) or (3).
- R 1 and R 2 are each independently a hydrogen atom, a halogen atom, a nitro group, a cyano group, or an alkyl group having 1 to 20 carbon atoms which may be substituted with a halogen atom,
- An alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or a heteroaryl group having 2 to 20 carbon atoms is represented.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, and a fluorine atom is preferable.
- alkyl group having 1 to 20 carbon atoms examples include the alkenyl group having 2 to 20 carbon atoms, the alkynyl group having 2 to 20 carbon atoms, and the aryl group having 6 to 20 carbon atoms.
- heteroaryl group having 2 to 20 carbon atoms include 2-furanyl group, 3-furanyl group, 2-oxazolyl group, 4-oxazolyl group, 5-oxazolyl group, 3-isoxazolyl group, 4-isoxazolyl group, Oxygen-containing heteroaryl group such as 5-isoxazolyl group; 2-thienyl group, 3-thienyl group, 2-thiazolyl group, 4-thiazolyl group, 5-thiazolyl group, 3-isothiazolyl group, 4-isothiazolyl group, 5-isothiazolyl group A sulfur-containing heteroaryl group such as a group; 2-imidazolyl group, 4-imidazolyl group, 2-pyridyl group, 3-pyridyl group, 4-pyridyl group, 2-pyrazyl group, 3-pyrazyl group, 5-pyrazyl group, 6 -Pyrazyl group, 2-pyrimidyl group, 4-pyrimidyl group, 5-pyr
- R 1 and R 2 a hydrogen atom, a fluorine atom, a cyano group, an alkyl group having 1 to 20 carbon atoms which may be substituted with a halogen atom, or a carbon number which may be substituted with a halogen atom
- An aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms which may be substituted with a halogen atom is preferred, and one carbon atom which may be substituted with a hydrogen atom, a fluorine atom, a cyano group or a halogen atom
- An alkyl group of ⁇ 10 or a phenyl group which may be substituted with a halogen atom is more preferable, a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group is still more preferable, and a hydrogen atom is most preferable.
- Ph 1 represents a group represented by formula (P1).
- R 3 to R 6 are each independently a hydrogen atom, a halogen atom, a nitro group, a cyano group, or an alkyl group having 1 to 20 carbon atoms which may be substituted with a halogen atom, or 2 carbon atoms Represents an alkenyl group having 20 carbon atoms, an alkynyl group having 2-20 carbon atoms, an aryl group having 6-20 carbon atoms, or a heteroaryl group having 2-20 carbon atoms. Specific examples thereof are the same as those described for R 1 and R 2 above.
- R 3 to R 6 a hydrogen atom, a fluorine atom, a cyano group, an alkyl group having 1 to 20 carbon atoms which may be substituted with a halogen atom, or a carbon atom having 6 to 6 carbon atoms which may be substituted with a halogen atom
- a 20 aryl group or a heteroaryl group having 2 to 20 carbon atoms which may be substituted with a halogen atom is preferable, and 1 to 10 carbon atoms which may be substituted with a hydrogen atom, a fluorine atom, a cyano group or a halogen atom.
- a phenyl group which may be substituted with an alkyl group or a halogen atom is more preferred, a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group is even more preferred, and a hydrogen atom is most preferred.
- Ar 1 independently represents a group represented by any one of the formulas (B1) to (B11), and in particular, any one of the formulas (B1 ′) to (B11 ′) The group represented by these is preferable.
- R 7 to R 27 , R 30 to R 51 and R 53 to R 154 may each independently be substituted with a hydrogen atom, a halogen atom, a nitro group, a cyano group, or a halogen atom.
- R 28 and R 29 each independently represent an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms, which may be substituted with Z 1 .
- R 52 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkynyl group having 2 to 20 carbon atoms, which may be substituted with Z 4 , or substituted with Z 1.
- an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms are independently represent an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms, which may be substituted with Z 1 .
- R 52 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkynyl group having 2 to 20 carbon atoms, which may be substituted
- Z 1 represents a halogen atom, a nitro group, a cyano group, or an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkynyl group having 2 to 20 carbon atoms, which may be substituted with Z 2.
- Z 2 represents a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms which may be substituted with Z 3 .
- Z 3 represents a halogen atom, a nitro group or a cyano group.
- Z 4 represents a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms which may be substituted with Z 5 .
- Z 5 represents a halogen atom, a nitro group, a cyano group, or an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkynyl group having 2 to 20 carbon atoms, which may be substituted with Z 3. Represents.
- halogen atoms alkyl groups having 1 to 20 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, alkynyl groups having 2 to 20 carbon atoms, aryl groups having 6 to 20 carbon atoms, and heteroaryl groups having 2 to 20 carbon atoms
- alkyl groups having 1 to 20 carbon atoms alkenyl groups having 2 to 20 carbon atoms, alkynyl groups having 2 to 20 carbon atoms, aryl groups having 6 to 20 carbon atoms, and heteroaryl groups having 2 to 20 carbon atoms
- Specific examples include the same as those described for R 1 and R 2 .
- R 7 to R 27 , R 30 to R 51 and R 53 to R 154 are each substituted with a hydrogen atom, a fluorine atom, a cyano group, a diphenylamino group which may be substituted with a halogen atom, or a halogen atom.
- a hydrogen atom, a fluorine atom, a cyano group, an alkyl group having 1 to 10 carbon atoms which may be substituted with a halogen atom, or a phenyl group which may be substituted with a halogen atom is more preferable.
- a methyl group, or a trifluoromethyl group is more preferable, and a hydrogen atom is most preferable.
- an aryl group Z 1 ⁇ carbon atoms 6 be replaced by 14, or a heteroaryl group Z 1 ⁇ 2 carbon atoms which may be substituted with 14 preferably, Z 1 substituted in the aryl group of ⁇ 14 6 carbon atoms which may be substituted are more preferred, and phenyl group which may be substituted with Z 1, which may be substituted with Z 1 1-naphthyl group, or Z 1 An optionally substituted 2-naphthyl group is even more preferred.
- R 52 heteroaryl group of a hydrogen atom, Z 1 substituted by good carbon number of 6 to 20 even though aryl group, Z 1 is optionally 2-20 carbon atoms substituted with, or Z 4 preferably an alkyl group which may having 1 to 20 carbon atoms also be a hydrogen atom, Z 1 aryl group is optionally carbon atoms of 6 to 14 substituted, 2 carbon atoms which may be substituted with Z 1 - 14 heteroaryl groups, or an alkyl group having 1 to 10 carbon atoms which may be substituted with Z 4 , more preferably a hydrogen atom, an aryl group having 6 to 14 carbon atoms which may be substituted with Z 1 , Z even more preferably an alkyl group having a nitrogen-containing heteroaryl group, or Z 4 carbon atoms which may be substituted with 1 to 10 carbon atoms which may 2-14 optionally substituted with 1, hydrogen atom, substituted with Z 1 Optionally substituted phenyl group, substituted with Z 1 Which may be 1-
- Ar 4 independently represents a C 6-20 aryl group in which each aryl group may be substituted with a diarylamino group which is a C 6-20 aryl group.
- aryl group having 6 to 20 carbon atoms are the same as those described for R 1 and R 2.
- diarylamino group include a diphenylamino group, 1-naphthylphenyl, and the like. Examples include an amino group, a di (1-naphthyl) amino group, a 1-naphthyl-2-naphthylamino group, and a di (2-naphthyl) amino group.
- Ar 4 includes phenyl group, 1-naphthyl group, 2-naphthyl group, 1-anthryl group, 2-anthryl group, 9-anthryl group, 1-phenanthryl group, 2-phenanthryl group, 3-phenanthryl group, 4- Phenanthryl group, 9-phenanthryl group, p- (diphenylamino) phenyl group, p- (1-naphthylphenylamino) phenyl group, p- (di (1-naphthyl) amino) phenyl group, p- (1-naphthyl- A 2-naphthylamino) phenyl group, a p- (di (2-naphthyl) amino) phenyl group and the like are preferable, and a p- (diphenylamino) phenyl group is more preferable.
- Ar 2 independently of each other represents a group represented by any one of the formulas (A1) to (A18), and in particular, the formulas (A1′-1) to (A18′-2) ) Is preferred.
- R 155 is a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an alkynyl group having 2 to 20 carbon atoms, which may be substituted with Z 4 , or Z 1 Represents an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms, which may be substituted with.
- R 156 and R 157 each independently represent an aryl group having 6 to 20 carbon atoms or a heteroaryl group having 2 to 20 carbon atoms, which may be substituted with Z 1 .
- DPA, Ar 4 , Z 1 and Z 4 represent the same meaning as described above.
- halogen atoms alkyl groups having 1 to 20 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, alkynyl groups having 2 to 20 carbon atoms, aryl groups having 6 to 20 carbon atoms, and heteroaryl groups having 2 to 20 carbon atoms
- alkyl groups having 1 to 20 carbon atoms alkenyl groups having 2 to 20 carbon atoms, alkynyl groups having 2 to 20 carbon atoms, aryl groups having 6 to 20 carbon atoms, and heteroaryl groups having 2 to 20 carbon atoms
- Specific examples include the same as those described for R 1 and R 2 .
- heteroaryl group are optionally 2-20 carbon atoms substituted with Z 1
- Z 4 in the alkyl group is preferably a substituted 1 carbon atoms which may be 1-20, hydrogen atom, Z 1 substituted by carbon atoms and optionally 6-14 aryl carbon atoms, which may be substituted with Z 1
- a heteroaryl group having 2 to 14 or an alkyl group having 1 to 10 carbon atoms which may be substituted with Z 4 is more preferable
- a hydrogen atom or an aryl group having 6 to 14 carbon atoms which may be substituted with Z 1 More preferably a nitrogen-containing heteroaryl group having 2 to 14 carbon atoms which may be substituted with Z 1 or an alkyl group having 1 to 10 carbon atoms which may be substituted with Z 4 , a hydrogen atom, Z 1 in an optionally substituted phenyl group, substituted with
- R 155 and DPA have the same meaning as described above.
- Ph 1 represents the same meaning as described above. x will be described later.
- Ar 5 simultaneously represents a group represented by any one of formulas (D1) to (D13), and in particular, may be a group represented by any one of formulas (D1 ′) to (D13 ′). preferable.
- R 28 , R 29 , R 52 , Ar 4 and DPA have the same meaning as described above.
- Specific examples of Ar 5 include the same groups as those described above as specific examples of groups suitable as Ar 1 .
- the arylamine derivative represented by the formula (2) is preferably the one represented by the formula (2-2).
- Ar 6 simultaneously represents a group represented by any one of formulas (E1) to (E14).
- R 52 represents the same meaning as described above.
- Ar 3 represents a group represented by any one of the formulas (C1) to (C8), and particularly preferred is a group represented by any of (C1 ′) to (C8 ′).
- DPA represents the same meaning as described above.
- x represents an integer of 1 to 10, preferably 1 to 5, more preferably 1 to 3, from the viewpoint of increasing the solubility of the compound in an organic solvent. 1 or 2 is even more preferred and 1 is optimal.
- y represents 1 or 2.
- Z 1 is a halogen atom, a nitro group, a cyano group, an alkyl group which 1 carbon atoms which may be ⁇ 10 substituted by Z 2, with Z 2
- An alkenyl group having 2 to 10 carbon atoms which may be substituted or an alkynyl group having 2 to 10 carbon atoms which may be substituted with Z 2 is preferable, substituted with a halogen atom, a nitro group, a cyano group or Z 2.
- Z 4 is preferably a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 14 carbon atoms which may be substituted with Z 5 ,
- a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 5 is more preferable, and a fluorine atom or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 5
- An aryl group is even more preferable, and a fluorine atom or a phenyl group optionally substituted with Z 5 is more preferable.
- Z 2 is preferably a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 14 carbon atoms which may be substituted with Z 3 ,
- a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 3 is more preferable, and a fluorine atom or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 3
- An aryl group is even more preferable, and a fluorine atom or a phenyl group optionally substituted with Z 3 is more preferable.
- Z 5 is a halogen atom, a nitro group, a cyano group, an alkyl group which 1 carbon atoms which may be ⁇ 10 substituted by Z 3, with Z 3
- An alkenyl group having 2 to 10 carbon atoms which may be substituted or an alkynyl group having 2 to 10 carbon atoms which may be substituted with Z 3 is preferable, and substituted with a halogen atom, a nitro group, a cyano group or Z 3 carbon atoms that may 1 be ⁇ 3 alkyl group, an alkenyl group of Z 3 - 2 carbon atoms which may be substituted with 3 or alkynyl groups of Z 3 - 2 carbon atoms which may be substituted with 3 more preferably, a fluorine atom, substituted by Z 3 in alkyl group having 1 carbon atoms which may be 3 substituents, alkenyl group of Z 3 - 2 carbon atoms which
- Z 3 is preferably a halogen atom, more preferably a fluorine atom.
- Z 1 is a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 3 carbon atoms which may be substituted with Z 2 , Z 2-substituted 2 carbon atoms which may be 1-3 alkenyl group, or an alkynyl group having 2 to 3 carbon atoms are preferable optionally substituted by Z 2, optionally substituted with a halogen atom, or Z 2
- the alkyl group having 1 to 3 carbon atoms may be more preferable, and a fluorine atom or a methyl group optionally substituted with Z 2 is more preferable.
- Z 4 represents a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 5.
- a halogen atom or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 5 is more preferable, and a fluorine atom or a phenyl group which may be substituted with Z 5 is even more preferable.
- Z 2 is a halogen atom, a nitro group, a cyano group, or an aryl group having 6 to 10 carbon atoms that may be substituted with Z 3
- a halogen atom or an aryl group having 6 to 10 carbon atoms which may be substituted with Z 3 is more preferable
- a fluorine atom or a phenyl group which may be substituted with Z 3 is even more preferable.
- Z 5 is a halogen atom, a nitro group, a cyano group, an alkyl group having 1 to 3 carbon atoms which may be substituted with Z 3 , Z 3-substituted 2 carbon atoms which may be 1-3 alkenyl group, or an alkynyl group having 2 to 3 carbon atoms are preferable optionally substituted by Z 3, substituted with a halogen atom, or Z 3
- the alkyl group having 1 to 3 carbon atoms may be more preferable, and a fluorine atom or a methyl group which may be substituted with Z 3 is more preferable.
- R 7 ⁇ R 27, R 30 ⁇ R 51 and R 53 ⁇ R 154, Z 3 is preferably a halogen atom, a fluorine atom is more preferable.
- R 52 and R 155 include, but are not limited to, those shown below.
- the carbon number of the alkyl group, alkenyl group and alkynyl group is preferably 10 or less, more preferably 6 or less, and even more preferably 4 or less.
- carbon number of the said aryl group and heteroaryl group becomes like this.
- it is 14 or less, More preferably, it is 10 or less, More preferably, it is 6 or less.
- the molecular weight of the arylamine derivative represented by the formula (2) and the arylamine derivative represented by the formula (3) is usually about 200 to 9,500 from the viewpoint of preparing a uniform varnish that gives a thin film with high flatness.
- it is preferably 8,000 or less, more preferably 7,000 or less, even more preferably 6,000 or less. 000 or less is more preferable, and from the viewpoint of obtaining a thin film having more excellent charge transportability, 300 or more is preferable, and 400 or more is more preferable.
- the charge transporting compound has no molecular weight distribution (dispersity is 1) from the viewpoint of preventing the charge transporting material from being separated when the film is thinned (that is, having a single molecular weight). Is preferred).
- the arylamine derivative represented by the formula (2) and the arylamine derivative represented by the formula (3) can be produced according to the method described in International Publication No. 2015/050253.
- the content of the charge transporting substance in the varnish of the present invention is appropriately set in consideration of the viscosity and surface tension of the varnish, the thickness of the thin film to be produced, etc., but is usually 0.1 to 10 in the varnish. In consideration of improving the coatability of the varnish, it is preferably about 0.5 to 5.0% by mass, more preferably about 1.0 to 3.0% by mass.
- the varnish for forming a charge transporting thin film of the present invention may contain a dopant from the viewpoint of further improving the charge transporting property of the obtained thin film.
- a dopant Aryl sulfonic acid is suitable.
- One example thereof is an aryl sulfonic acid represented by the formula (4) or (5).
- a 1 represents —O— or —S—, preferably —O—.
- a 2 represents a naphthalene ring or an anthracene ring, and a naphthalene ring is preferable.
- a 3 represents a divalent to tetravalent perfluorobiphenyl group, j 1 represents the number of bonds between A 1 and A 3, is an integer satisfying 2 ⁇ j 1 ⁇ 4, A 3 is a divalent par It is preferably a fluorobiphenyl group and j 1 is 2.
- j 2 represents the number of sulfonic acid groups bonded to A 2 , and is an integer satisfying 1 ⁇ j 2 ⁇ 4, but 2 is preferable.
- a 4 to A 8 are independently of each other a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 20 carbon atoms, a halogenated alkyl group having 1 to 20 carbon atoms, or 2 carbon atoms.
- k represents the number of sulfonic acid groups bonded to the naphthalene ring and is an integer satisfying 1 ⁇ k ⁇ 4, preferably 2 to 4, and more preferably 2.
- Examples of the halogenated alkyl group having 1 to 20 carbon atoms include trifluoromethyl group, 2,2,2-trifluoroethyl group, 1,1,2,2,2-pentafluoroethyl group, 3,3,3- Trifluoropropyl group, 2,2,3,3,3-pentafluoropropyl group, 1,1,2,2,3,3,3-heptafluoropropyl group, 4,4,4-trifluorobutyl group, 3,3,4,4,4-pentafluorobutyl group, 2,2,3,3,4,4,4-heptafluorobutyl group, 1,1,2,2,3,3,4,4, Examples include 4-nonafluorobutyl group.
- Examples of the halogenated alkenyl group having 2 to 20 carbon atoms include perfluorovinyl group, 1-perfluoropropenyl group, perfluoroallyl group, perfluorobutenyl group and the like.
- halogen atom and the alkyl group having 1 to 20 carbon atoms include the same ones as described above, but the halogen atom is preferably a fluorine atom.
- a 4 to A 8 are a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 10 carbon atoms, a halogenated alkyl group having 1 to 10 carbon atoms, or a halogenated alkenyl group having 2 to 10 carbon atoms.
- at least three of A 4 to A 8 are preferably fluorine atoms, hydrogen atom, fluorine atom, cyano group, alkyl group having 1 to 5 carbon atoms, fluorinated alkyl having 1 to 5 carbon atoms.
- a alkenyl fluoride group having 2 to 5 carbon atoms, and at least three of A 4 to A 8 are more preferably fluorine atoms, a hydrogen atom, a fluorine atom, a cyano group, and 1 to 5 carbon atoms. More preferably, the perfluoroalkyl group or the perfluoroalkenyl group having 1 to 5 carbon atoms, and A 4 , A 5 and A 8 are fluorine atoms.
- the perfluoroalkyl group is a group in which all hydrogen atoms of the alkyl group are substituted with fluorine atoms
- the perfluoroalkenyl group is a group in which all hydrogen atoms of the alkenyl group are substituted with fluorine atoms.
- the content of the dopant in the varnish of the present invention is appropriately set in consideration of the type and amount of the charge transporting material, but is usually about 0.5 to 10 with respect to the charge transporting material in mass ratio. It is.
- organosilane compounds such as trimethoxysilane and triethoxysilane
- hole injection of the thin film Other components such as a fluorine atom-containing oligoaniline derivative may be contained for the purpose of improving the above.
- the content of other components in the charge transporting thin film forming varnish of the present invention is not particularly limited as long as the effects of the present invention are not impaired, and is determined according to the properties, functions, etc. of the other components.
- the fluorine atom-containing oligoaniline derivative is usually about 5 to 50% by mass, preferably about 10 to 30% by mass with respect to the charge transporting substance.
- fluorine atom-containing oligoaniline derivative examples include those represented by the formula (6).
- R 301 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms which may be substituted with Z.
- Z is a halogen atom, a nitro group, a cyano group, an aldehyde group, a hydroxy group, a thiol group, a sulfonic acid group, a carboxy group, an aryl group having 6 to 20 carbon atoms which may be substituted with Z ′, or substituted with Z ′.
- Z ′ represents a halogen atom, nitro group, cyano group, aldehyde group, hydroxy group, thiol group, sulfonic acid group or carboxy group.
- R 302 to R 310 are each independently a hydrogen atom, a halogen atom, a nitro group, a cyano group, or an alkyl group having 1 to 20 carbon atoms, optionally substituted with a halogen atom, An alkenyl group, an alkynyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, or a heteroaryl group having 2 to 20 carbon atoms is represented.
- halogen atoms alkyl groups having 1 to 20 carbon atoms, alkenyl groups having 2 to 20 carbon atoms, alkynyl groups having 2 to 20 carbon atoms, aryl groups having 6 to 20 carbon atoms, and heteroaryl groups having 2 to 20 carbon atoms The thing similar to what was mentioned above is mentioned.
- R 301 is preferably a hydrogen atom or an alkyl group having 1 to 10 carbon atoms which may be substituted with Z, considering the solubility of the fluorine atom-containing oligoaniline derivative in an organic solvent.
- An atom or an alkyl group having 1 to 4 carbon atoms which may be substituted with Z is more preferable, and a hydrogen atom is most preferable.
- a plurality of R 301 may be the same or different.
- R 302 to R 310 are substituted with a hydrogen atom, a halogen atom, a nitro group, a cyano group, or a halogen atom in consideration of the solubility of the fluorine atom-containing oligoaniline derivative in an organic solvent.
- An optionally substituted alkyl group having 1 to 10 carbon atoms is preferable, a hydrogen atom, a halogen atom, or an alkyl group having 1 to 4 carbon atoms which may be substituted with a halogen atom is more preferable, and a hydrogen atom is most preferable.
- the plurality of R 302 to R 305 may be the same or different.
- A represents a cyano group, a chlorine atom, a bromine atom, an iodine atom, a nitro group or a fluoroalkyl group having 1 to 20 carbon atoms which may be substituted with a fluoroalkoxy group having 1 to 20 carbon atoms.
- the fluoroalkyl group is not particularly limited as long as it is a linear or branched alkyl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- the fluorocycloalkyl group is not particularly limited as long as it is a cycloalkyl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- a 1-fluorocyclopropyl group a 2-fluorocyclopropyl group 2,2-difluorocyclopropyl group, 2,2,3,3-tetrafluorocyclopropyl group, pentafluorocyclopropyl group, 2,2-difluorocyclobutyl group, 2,2,3,3-tetrafluorocyclo Butyl group, 2,2,3,3,4,4-hexafluorocyclobutyl group, heptafluorocyclobutyl group, 1-fluorocyclopentyl group, 3-fluorocyclopentyl group, 3,3-difluorocyclopentyl group, 3,3 , 4,4-tetrafluorocyclopentyl group, nonafluoro
- the fluorobicycloalkyl group is not particularly limited as long as it is a bicycloalkyl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- the fluoroalkenyl group is not particularly limited as long as it is an alkenyl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- the fluoroalkynyl group is not particularly limited as long as it is an alkynyl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- a fluoroethynyl group, a 3-fluoro-1-propynyl group, 3, Examples include a 3-difluoro-1-propynyl group, a 3,3,3-trifluoro-1-propynyl group, a 1-fluoro-2-propynyl group, and a 1,1-difluoro-2-propynyl group.
- the fluoroaryl group is not particularly limited as long as it is an aryl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- fluoroaryl group a cyano group, a chlorine atom, a bromine atom, iodine, etc. are considered in consideration of the balance of the solubility of the fluorine atom-containing oligoaniline derivative in an organic solvent, the availability of raw materials for the fluorine atom-containing oligoaniline derivative, and the like.
- Substituted with 3 or more fluorine atoms which may be substituted with an atom, a nitro group, an alkyl group having 1 to 20 carbon atoms, a fluoroalkyl group having 1 to 20 carbon atoms or a fluoroalkoxy group having 1 to 20 carbon atoms
- a phenyl group is preferred.
- the fluoroalkoxy group is not particularly limited as long as it is an alkoxy group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- the fluoroalkyl group having 1 to 20 carbon atoms, the fluorocycloalkyl group having 3 to 20 carbon atoms, the fluorobicycloalkyl group having 4 to 20 carbon atoms, the fluoroalkenyl group having 2 to 20 carbon atoms, or the fluoro having 2 to 20 carbon atoms As an aryl group having 6 to 20 carbon atoms that may be substituted with an alkynyl group and optionally substituted with a cyano group, a halogen atom, or a fluoroalkoxy group having 1 to 20 carbon atoms (hereinafter also referred to as a substituted aryl group for convenience)
- at least one hydrogen atom on the carbon atom is a fluoroalkyl group having 1 to 20 carbon atoms, a fluorocycloalkyl group having 3 to 20 carbon atoms, a fluorobicycloalkyl group having 4 to 20 carbon atoms, or 2 to 20 carbon atoms.
- the substituted aryl group includes a fluorocycloalkyl group having 3 to 20 carbon atoms in consideration of the balance between the solubility of the fluorine atom-containing oligoaniline derivative in an organic solvent and the availability of the raw material for the fluorine atom-containing oligoaniline derivative.
- a fluorobicycloalkyl group having 4 to 20 carbon atoms a fluoroalkenyl group having 2 to 20 carbon atoms, or a fluoroalkynyl group having 2 to 20 carbon atoms, and a cyano group, a halogen atom, or a fluoro having 1 to 20 carbon atoms
- a phenyl group which may be substituted with an alkoxy group (hereinafter also referred to as a substituted phenyl group for convenience) is preferred, and a phenyl group substituted with 1 to 3 trifluoromethyl groups is more preferred, and p-trifluoromethylphenyl Groups are even more preferred.
- the fluoroaralkyl group is not particularly limited as long as it is an aralkyl group in which at least one hydrogen atom on a carbon atom is substituted with a fluorine atom.
- the aralkyl group having 7 to 20 carbon atoms that is substituted with an alkynyl group and optionally substituted with a cyano group, a halogen atom, or a fluoroalkoxy group having 1 to 20 carbon atoms includes at least one hydrogen on the carbon atom
- A is preferably the optionally substituted fluoroalkyl group having 1 to 20 carbon atoms, the optionally substituted fluoroaryl group having 6 to 20 carbon atoms, or the substituted aryl group.
- the optionally substituted fluoroaryl group having 6 to 20 carbon atoms or the substituted aryl group is more preferable, the optionally substituted fluorophenyl group or the substituted phenyl group is more preferable, and the substituted aryl group may be substituted.
- n 1 is an integer of 1 to 20, preferably 2 to 10, more preferably 2 to 8, even more preferably 3 to 5, and still more preferably 3 to 4.
- the fluorine atom-containing oligoaniline derivative is obtained by reacting an amine compound represented by the formula (7) with a fluorine atom-containing acid halide represented by the formula (8), as represented by Scheme A below. Can be synthesized. At this time, the reaction is preferably performed in the presence of a base for the purpose of allowing the reaction to proceed more efficiently.
- X represents a halogen atom such as a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, and is preferably a chlorine atom or a bromine atom.
- Examples of the amine compound represented by the formula (7) include, but are not limited to, those represented by the following formula.
- Examples of the fluorine atom-containing acid halide represented by the formula (8) include 2-fluorobenzoyl chloride, 3-fluorobenzoyl chloride, 4-fluorobenzoyl chloride, 2-fluoro-4-methylbenzoyl chloride, 2-fluoro-5.
- Examples of the base include alkoxides such as t-butoxy sodium (t-BuONa) and t-butoxy potassium; fluoride salts such as lithium fluoride, potassium fluoride and cesium fluoride; sodium carbonate, potassium carbonate, sodium bicarbonate, Carbonates such as potassium hydrogen carbonate; trimethylamine, triethylamine, diisopropylethylamine, tetramethylethylenediamine, pyridine, morpholine, N-methylmorpholine, quinuclidine, 1,4-diazabicyclo [2.2.2] octane, 4-dimethylaminopyridine, etc.
- the amines are not particularly limited as long as they are used for this kind of reaction. In particular, triethylamine, pyridine, diisopropylethylamine and the like are preferable because they are easy to handle.
- the reaction solvent is preferably an aprotic polar organic solvent, for example, N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, dimethyl sulfoxide, tetrahydrofuran And dioxane.
- N, N-dimethylformamide, N, N-dimethylacetamide, tetrahydrofuran, dioxane and the like are preferable.
- the reaction temperature is appropriately set in the range from the melting point to the boiling point of the solvent in consideration of the type and amount of the raw material compound and catalyst used, but is usually about 0 to 200 ° C., preferably 20 to 150 ° C. .
- the reaction time varies depending on the starting compound used, the type and amount of the catalyst, the reaction temperature, and the like, and thus cannot be generally defined, but is usually about 1 to 24 hours.
- the target fluorine atom-containing oligoaniline derivative can be obtained by post-treatment according to a conventional method.
- the fluorine atom-containing acid halide represented by the formula (8) is a corresponding fluorine atom-containing carboxylic acid such as thionyl chloride, oxalyl chloride, phosphoryl chloride, sulfuryl chloride, phosphorus trichloride, phosphorus pentachloride, etc. It can be obtained by reacting with an electrophilic halogenating agent.
- a commercially available product may be used, and a known method (for example, JP-A-9-67303, JP-A-9-67304, JP-A-2002-284733, etc.) may be used. It can also be synthesized by the method described.
- organic solvent used when preparing the varnish for forming a charge transporting thin film a good solvent capable of dissolving the charge transporting substance and the dopant well can be used.
- solvents examples include N, N-dimethylformamide, N, N-dimethylacetamide, N, N-dimethylbutyramide, N, N-diethylbutyramide, N, N-methylethylbutyramide, N , N-dimethylisobutyramide, N, N-diethylisobutyramide, N-ethyl-N-methylisobutyramide, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, and the like, It is not limited to these. These solvents can be used alone or in combination of two or more. The amount used can be 5 to 100% by mass in the solvent used for the varnish.
- the charge transporting substance, the dopant and the like are completely dissolved in the solvent.
- organic solvents may be included in addition to the organic solvent for the purpose of improving the wettability to the substrate, adjusting the surface tension of the solvent, adjusting the polarity, adjusting the boiling point, and the like.
- organic solvents Diethylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, 1,2-ethanediol (ethylene glycol), 1,2-propanediol (propylene glycol), 1,2-butanediol, 2,3-butanediol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 2-methyl-2,4-pentanediol (hexylene glycol), 1,3-octylene glycol, 3,6-octyl Glycols such as lenglycol; Triols such as glycerin; Ethylene glycol monoalkyl ethers such as ethylene glycol
- Alkylene glycol monoaryl ethers such as ethylene glycol monoaryl ethers such as ethylene glycol monophenyl ether, propylene glycol monoaryl ethers such as propylene glycol monophenyl ether; Alkylene glycol monoaralkyl ethers such as ethylene glycol monoaralkyl ethers such as ethylene glycol monobenzyl ether and propylene glycol monoaralkyl ethers such as propylene glycol monobenzyl ether; Alkylene glycol alkoxyalkyl ethers such as ethylene glycol alkoxyalkyl ethers such as ethylene glycol butoxyethyl ether, propylene glycol alkoxyalkyl ethers such as propylene glycol butoxyethyl ether; Ethylene glycol dialkyl ethers such as ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dipropy
- Alkyl aryl ethers Alkyl aralkyl ethers such as ethyl benzyl ether; Cyclic alkyl monoethers such as 2-methylfuran, tetrahydrofuran, tetrahydropyran; Cyclic alkyl diethers such as 1,4-dioxane; Cyclic alkyl triethers such as trioxane; Diepoxyalkyl ethers such as diglycidyl ether; Ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, isobutyl acetate, s-butyl acetate, t-butyl acetate, n-pentyl acetate, (3-methylbutyl) acetate, n-hexyl acetate, (2-ethylbutyl ) Alkyl acetates such as linear or branched alkyl acetate
- organic solvents other than good solvents may include glycols, triols, alkylene glycol monoalkyl ethers, alkylene glycol dialkyl ethers, dialkylene glycol monoalkyl ethers, dialkylene glycol dialkyl ethers.
- glycols, alkylene glycol monoalkyl ethers, dialkylene glycol monoalkyl ethers are more preferable, and diethylene glycol, triethylene glycol, dipropylene glycol, 1,2-ethanediol, 1,2-propanediol, 1,2-butanediol, 2,3-butanediol, 1,3-butanediol, 1,4-butanediol, ethylene glycol monomethyl ether, ethylene glycol Ethyl ether, ethylene glycol propyl ether, ethylene glycol isopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monoisobutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monoisopropyl ether, propylene glycol mono Butyl ether, propylene glycol monoisobut
- Ethylene glycol, dipropylene glycol, 1,2-ethanediol, 1,2-propanediol, 1,2-butanediol, 2,3-butanediol, 1,3-butanediol, 1,4-butanediol, ethylene Containing glycol monomethyl ether, propylene glycol monomethyl ether, diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether Are more preferable.
- a varnish having desired liquid properties can be easily prepared by selecting a solvent to be used from such solvents while considering the type and amount of the charge transporting substance and the dopant.
- the viscosity of the varnish of the present invention is appropriately set according to the thickness of the thin film to be produced and the solid content concentration, but is usually 1 to 50 mPa ⁇ s at 25 ° C., and its surface tension is usually 20 to 50 mN. / M.
- the method for preparing the varnish for forming a charge transporting thin film is not particularly limited.
- a charge transporting substance is first dissolved in a solvent, and then a dopant, 2,2,6,6-tetraalkylpiperidine-N—
- Examples include a method of sequentially adding an oxyl derivative and a method of dissolving a mixture of a charge transporting substance, a dopant, and a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative in a solvent.
- organic solvents when there are a plurality of organic solvents, these are first dissolved in a solvent that well dissolves the charge transporting substance, the dopant, and the 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative, and then other solvents are added thereto.
- a solvent may be added, or a charge transporting substance, a dopant, a 2,2,6,6-tetraalkylpiperidine-N-oxyl derivative may be dissolved sequentially or simultaneously in a mixed solvent of a plurality of organic solvents. Good.
- the charge transporting thin film varnish is prepared by dissolving a charge transporting substance, a dopant, etc. in an organic solvent, and then using a sub-micron order filter or the like. It is desirable to filter.
- a charge transporting thin film can be formed on a substrate by applying the varnish for forming a charge transporting thin film of the present invention on a substrate and baking it.
- Examples of the varnish coating method include, but are not limited to, a dipping method, a spin coating method, a transfer printing method, a roll coating method, a brush coating method, an ink jet method, a spray method, and a slit coating method.
- a spin coating method, an ink jet method, and a spray method are preferable.
- the varnish of the present invention in order to obtain a thin film having a uniform film formation surface and high charge transportability, considering the charge transporting substance, dopant, type of solvent, etc. included in the present invention, It is necessary to select a firing atmosphere (under an air atmosphere, under an inert gas such as nitrogen, under vacuum, etc.), but in most cases, a uniform thin film having excellent charge transportability is obtained by firing in the air atmosphere. be able to.
- the firing temperature is appropriately set within a range of about 100 to 260 ° C. in consideration of the use of the obtained thin film, the degree of charge transportability imparted to the obtained thin film, and the like. When used as, it is preferably about 140 to 250 ° C, more preferably about 150 to 230 ° C.
- the varnish of the present invention is characterized by being capable of low-temperature baking at less than 200 ° C., particularly 150 to 190 ° C., so that a thin film having excellent charge transportability can be realized even when baking at a relatively low temperature. .
- two or more steps of temperature change may be applied for the purpose of expressing higher uniform film forming property or allowing the reaction to proceed on the substrate. The heating may be performed using an appropriate device such as a hot plate or an oven.
- the film thickness of the charge transporting thin film is not particularly limited, but is preferably 5 to 200 nm when used as a hole injection layer of an organic EL device.
- a method for changing the film thickness there are methods such as changing the concentration of a charge transporting substance or the like in the varnish, or changing the amount of the solution on the substrate during coating.
- the charge transporting thin film of the present invention can be suitably used as a hole injection layer in an organic EL device, but can also be used as a charge transporting functional layer such as a hole injection transport layer.
- the organic EL device of the present invention has a pair of electrodes, and has the above-described charge transporting thin film of the present invention between these electrodes.
- Typical configurations of the organic EL element include (a) to (f) below, but are not limited thereto.
- an electron blocking layer or the like can be provided between the light emitting layer and the anode
- a hole (hole) blocking layer or the like can be provided between the light emitting layer and the cathode.
- the hole injection layer, the hole transport layer, or the hole injection transport layer may have a function as an electron block layer or the like
- the electron injection layer, the electron transport layer, or the electron injection transport layer is a hole. It may have a function as a block layer or the like.
- A Anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / cathode
- b Anode / hole injection layer / hole transport layer / light emission layer / electron injection transport layer / Cathode
- c anode / hole injection transport layer / light emitting layer / electron transport layer / electron injection layer / cathode
- d anode / hole injection transport layer / light emitting layer / electron injection transport layer / cathode
- e anode / positive Hole injection layer / hole transport layer / light emitting layer / cathode
- f anode / hole injection transport layer / light emitting layer / cathode
- “Hole injection layer”, “hole transport layer” and “hole injection transport layer” are layers formed between a light emitting layer and an anode, and transport holes from the anode to the light emitting layer. It has a function. When only one layer of a hole transporting material is provided between the light emitting layer and the anode, it is a “hole injection transporting layer”, and a layer of the hole transporting material is provided between the light emitting layer and the anode. When two or more layers are provided, the layer close to the anode is a “hole injection layer”, and the other layers are “hole transport layers”. In particular, for the hole injection layer and the hole injection transport layer, a thin film that is excellent not only in accepting holes from the anode but also injecting holes into the hole transport layer and the light emitting layer is used.
- Electrode “Electron injection layer”, “electron transport layer” and “electron injection transport layer” are layers formed between a light emitting layer and a cathode, and have a function of transporting electrons from the cathode to the light emitting layer. It is. When only one layer of the electron transporting material is provided between the light emitting layer and the cathode, it is an “electron injecting and transporting layer”, and two layers of the electron transporting material are provided between the light emitting layer and the cathode. When provided as described above, the layer close to the cathode is an “electron injection layer”, and the other layers are “electron transport layers”.
- the “light emitting layer” is an organic layer having a light emitting function, and includes a host material and a dopant material when a doping system is employed.
- the host material mainly has a function of encouraging recombination of electrons and holes and confining excitons in the light emitting layer, and the dopant material efficiently emits excitons obtained by recombination. It has a function.
- the host material mainly has a function of confining excitons generated by the dopant in the light emitting layer.
- Examples of materials and methods for producing an organic EL device using the charge transporting thin film forming varnish of the present invention include the following, but are not limited thereto.
- the electrode substrate to be used is preferably cleaned in advance by cleaning with a liquid such as a detergent, alcohol, or pure water.
- a liquid such as a detergent, alcohol, or pure water.
- the anode substrate is subjected to surface treatment such as UV ozone treatment or oxygen-plasma treatment immediately before use. It is preferable.
- the surface treatment may not be performed.
- An example of the method for producing the organic EL device of the present invention when the thin film obtained from the varnish for forming a charge transporting thin film of the present invention is a hole injection layer is as follows.
- the charge transporting thin film forming varnish of the present invention is applied onto the anode substrate and baked to form a hole injection layer on the electrode.
- a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and a cathode are provided in this order.
- the hole transport layer, the light emitting layer, the electron transport layer, and the electron injection layer may be formed by either a vapor deposition method or a coating method (wet process) depending on the characteristics of the material used.
- anode material examples include transparent electrodes typified by indium tin oxide (ITO) and indium zinc oxide (IZO), metal anodes typified by aluminum, alloys thereof, and the like. What performed the chemical conversion process is preferable. Polythiophene derivatives and polyaniline derivatives having high charge transporting properties can also be used.
- metals constituting the metal anode include scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, yttrium, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, cadmium.
- Materials for forming the hole transport layer include (triphenylamine) dimer derivatives, [(triphenylamine) dimer] spirodimers, N, N′-bis (naphthalen-1-yl) -N, N′-bis (Phenyl) -benzidine ( ⁇ -NPD), N, N′-bis (naphthalen-2-yl) -N, N′-bis (phenyl) -benzidine, N, N′-bis (3-methylphenyl)- N, N′-bis (phenyl) -benzidine, N, N′-bis (3-methylphenyl) -N, N′-bis (phenyl) -9,9-spirobifluorene, N, N′-bis ( Naphthalen-1-yl) -N, N′-bis (phenyl) -9,9-spirobifluorene, N, N′-bis (3-methylphenyl) -N, N′-bis (phenyl) -9,9-s
- Materials for forming the light emitting layer include tris (8-quinolinolato) aluminum (III) (Alq 3 ), bis (8-quinolinolato) zinc (II) (Znq 2 ), bis (2-methyl-8-quinolinolato)- 4- (p-phenylphenolate) aluminum (III) (BAlq), 4,4′-bis (2,2-diphenylvinyl) biphenyl, 9,10-di (naphthalen-2-yl) anthracene, 2-t -Butyl-9,10-di (naphthalen-2-yl) anthracene, 2,7-bis [9,9-di (4-methylphenyl) -fluoren-2-yl] -9,9-di (4- Methylphenyl) fluorene, 2-methyl-9,10-bis (naphthalen-2-yl) anthracene, 2- (9,9-spirobifluoren-2-yl) -9,9-spir
- Materials for forming the electron injection layer include lithium oxide (Li 2 O), magnesium oxide (MgO), alumina (Al 2 O 3 ), lithium fluoride (LiF), sodium fluoride (NaF), magnesium fluoride ( MgF 2 ), cesium fluoride (CsF), strontium fluoride (SrF 2 ), molybdenum trioxide (MoO 3 ), aluminum, lithium acetylacetonate (Li (acac)), lithium acetate, lithium benzoate, etc. .
- cathode material examples include aluminum, magnesium-silver alloy, aluminum-lithium alloy, lithium, sodium, potassium, cesium and the like.
- the hole transport layer, the light emitting layer, the electron transport layer, and the electron injection layer are formed by sequentially forming the hole transport layer and the light emitting layer, instead of performing the vacuum deposition operation.
- An organic EL device having a charge transporting thin film formed by the transportable thin film forming varnish can be produced.
- the charge transporting thin film forming varnish of the present invention is applied on the anode substrate to prepare a hole injection layer by the above method, and a hole transport layer and a light emitting layer are sequentially formed thereon, Further, a cathode material is deposited to form an organic EL element.
- the same materials as described above can be used, and the same cleaning treatment and surface treatment can be performed.
- a hole transporting polymer material or a light emitting polymer material, or a material obtained by adding a dopant to these materials is dissolved or uniformly dispersed.
- coating on a positive hole injection layer or a positive hole transport layer is mentioned.
- Examples of the light-emitting polymer material include polyfluorene derivatives such as poly (9,9-dialkylfluorene) (PDAF), poly (2-methoxy-5- (2′-ethylhexoxy) -1,4-phenylenevinylene) (MEH). -PPV) and the like, polythiophene derivatives such as poly (3-alkylthiophene) (PAT), polyvinylcarbazole (PVCz) and the like.
- PDAF poly (9,9-dialkylfluorene)
- MEH 2-methoxy-5- (2′-ethylhexoxy) -1,4-phenylenevinylene
- PVT polythiophene derivatives
- PVCz polyvinylcarbazole
- Examples of the solvent include toluene, xylene, chloroform and the like.
- Examples of the dissolution or uniform dispersion method include methods such as stirring, heating and stirring, and ultrasonic dispersion.
- the coating method is not particularly limited, and examples thereof include an inkjet method, a spray method, a dip method, a spin coating method, a transfer printing method, a roll coating method, and a brush coating.
- the application is preferably performed under an inert gas such as nitrogen or argon.
- the firing method a method of heating with an oven or a hot plate under an inert gas or in a vacuum can be mentioned.
- An example of the method for producing the organic EL device of the present invention when the thin film obtained from the varnish for forming a charge transporting thin film of the present invention is a hole injection transport layer is as follows.
- a hole injection transport layer is formed on the anode substrate, and a light emitting layer, an electron transport layer, an electron injection layer, and a cathode are provided in this order on the hole injection transport layer.
- Examples of the formation method and specific examples of the light emitting layer, the electron transport layer, and the electron injection layer include the same ones as described above.
- Examples of the anode material, the light emitting layer, the luminescent dopant, the material for forming the electron transport layer and the electron block layer, and the cathode material include the same materials as described above.
- a hole block layer, an electron block layer, or the like may be provided between the electrode and any of the layers as necessary.
- a material for forming the electron blocking layer tris (phenylpyrazole) iridium and the like can be given.
- the materials constituting the anode and the cathode and the layer formed between them differ depending on whether a device having a bottom emission structure or a top emission structure is manufactured. Therefore, the material is appropriately selected in consideration of this point. .
- a transparent anode is used on the substrate side, and light is extracted from the substrate side
- a reflective anode made of metal is used in the opposite direction to the substrate.
- Light is extracted from a certain transparent electrode (cathode) side. Therefore, for example, regarding the anode material, a transparent anode such as ITO is used when manufacturing an element having a bottom emission structure, and a reflective anode such as Al / Nd is used when manufacturing an element having a top emission structure.
- the organic EL device of the present invention may be sealed together with a water catching agent or the like according to a standard method in order to prevent deterioration of characteristics.
- the arylamine derivative was synthesized according to the method described in International Publication No. 2013/084664, and the arylsulfonic acid was synthesized according to the method described in International Publication No. 2006/025342. (Wherein DPA is the same as above)
- a varnish was prepared in the same manner as in Example 1 except that 0.0245 g of 2-azaadamantane-N-oxyl (hereinafter referred to as AZADO), a commonly used organic oxidant, was used instead of TEMPO.
- AZADO 2-azaadamantane-N-oxyl
- TEMPO 2-azaadamantane-N-oxyl
- Example 2-1 0.1147 g of an arylamine derivative represented by the formula (J11-79), 0.162 g of an aryl sulfonic acid represented by the formula (b-1), 0.0186 g of TEMPO (manufactured by Tokyo Chemical Industry Co., Ltd.) was dissolved in 3.3 g of DMI. Thereto, 4 g of 2,3-butanediol (2,3-BD) and 2.7 g of dipropylene glycol monomethyl ether (DPM) were added and stirred, and the resulting solution was filtered using a PTFE filter having a pore size of 0.2 ⁇ m. And filtered to obtain a varnish.
- the arylamine derivative was synthesized according to the method described in International Publication No. 2015/050253.
- Example 3-1 0.084 g of an arylamine derivative represented by the formula (f), 0.013 g of a fluorine atom-containing oligoaniline derivative represented by the formula (E-138), and an aryl sulfonic acid represented by the formula (b-1) 0.208 g and 0.0216 g of TEMPO (manufactured by Tokyo Chemical Industry Co., Ltd.) were dissolved in 3.3 g of DMI. 2,4-BD (4 g) and DPM (2.7 g) were added thereto and stirred, and the resulting solution was filtered using a PTFE filter having a pore size of 0.2 ⁇ m to obtain a varnish.
- TEMPO manufactured by Tokyo Chemical Industry Co., Ltd.
- the fluorine atom-containing oligoaniline derivative represented by the formula (E-138) was synthesized by the following method.
- the flask was charged with 3.0 g of tetraaniline, 1.91 g of 2,3,4,5-tetrafluorobenzoyl chloride and 60 g of N, N-dimethylacetamide, and the atmosphere in the flask was replaced with nitrogen. Stir. After completion of the stirring, 30 mL of a 5 mol / L sodium hydroxide aqueous solution was added and further stirred for 30 minutes. Ethyl acetate and saturated brine were mixed into the reaction solution and subjected to liquid separation treatment until the pH reached 7 (3 times). The obtained organic layer was dried over sodium sulfate, and then concentrated under reduced pressure. To this concentrated solution, 15 mL of THF was added.
- Example 1-2 Production and characteristic evaluation of organic EL element
- the varnish obtained in Example 1-1 was applied to an ITO substrate using a spin coater, then dried at 80 ° C. for 1 minute, and further baked at 180 ° C. for 15 minutes in an air atmosphere. A uniform thin film of 30 nm was formed.
- As the ITO substrate a glass substrate of 25 mm ⁇ 25 mm ⁇ 0.7 t with indium tin oxide (ITO) patterned to a thickness of 150 nm on the surface is used, and an O 2 plasma cleaning device (150 W, 30 seconds) before use. To remove impurities on the surface.
- ITO indium tin oxide
- ⁇ -NPD was formed to a thickness of 30 nm at 0.2 nm / second on the ITO substrate on which the thin film was formed using a vapor deposition apparatus (vacuum degree: 1.0 ⁇ 10 ⁇ 5 Pa).
- CBP and Ir (PPy) 3 were co-evaporated.
- the deposition rate was controlled so that the concentration of Ir (PPy) 3 was 6%, and the layers were laminated to 40 nm.
- an organic EL element was obtained by sequentially laminating thin films of BAlq, lithium fluoride, and aluminum.
- the deposition rates were 0.2 nm / second for BAlq and aluminum, 0.02 nm / second for lithium fluoride, and the film thicknesses were 20 nm, 0.5 nm, and 100 nm, respectively.
- the characteristic was evaluated. Sealing was performed according to the following procedure.
- the organic EL element is placed between the sealing substrates, and the sealing substrate is bonded with an adhesive (XNR5516Z-B1 manufactured by Nagase ChemteX Corporation). It was. At this time, a water-absorbing agent (manufactured by Dynic Co., Ltd., HD-071010W-40) was placed in the sealing substrate together with the organic EL element.
- the bonded sealing substrate was irradiated with UV light (wavelength: 365 nm, irradiation amount: 6,000 mJ / cm 2 ), and then annealed at 80 ° C. for 1 hour to cure the adhesive.
- Table 22 shows drive voltage, current density, and current efficiency when the device was made to emit light at 2,000 cd / m 2 .
- Table 23 shows current density, luminance, and current efficiency when the device was driven at 9V.
- Table 24 shows the half life of the element luminance (initial luminance: 5,000 cd / m 2 ).
- Example 2-2 The varnish obtained in Example 2-1 was applied to an ITO substrate using a spin coater, then dried at 80 ° C. for 1 minute, and further baked at 180 ° C. for 15 minutes in an air atmosphere to be applied on the ITO substrate. A uniform thin film of 65 nm was formed.
- a glass substrate of 25 mm ⁇ 25 mm ⁇ 0.7 t with indium tin oxide (ITO) patterned to a thickness of 150 nm on the surface is used, and an O 2 plasma cleaning device (150 W, 30 seconds) before use. To remove impurities on the surface.
- ITO indium tin oxide
- ⁇ -NPD was formed to a thickness of 30 nm at 0.2 nm / second on the ITO substrate on which the thin film was formed using a vapor deposition apparatus (vacuum degree: 1.0 ⁇ 10 ⁇ 5 Pa).
- CBP and Ir (PPy) 3 were co-evaporated.
- the deposition rate was controlled so that the concentration of Ir (PPy) 3 was 6%, and the layers were laminated to 40 nm.
- an organic EL element was obtained by sequentially laminating thin films of BAlq, lithium fluoride, and aluminum.
- the deposition rates were 0.2 nm / second for BAlq and aluminum, 0.02 nm / second for lithium fluoride, and the film thicknesses were 20 nm, 0.5 nm, and 100 nm, respectively.
- the characteristic was evaluated. Sealing was performed in the same procedure as in Example 1-2.
- Table 25 shows the drive voltage, current density, and current efficiency when the device was made to emit light at 5,000 cd / m 2 .
- Table 26 shows current density, luminance, and current efficiency when the device was driven at 9V.
- Table 27 shows the half life of the element luminance (initial luminance: 5,000 cd / m 2 ).
- Example 3-2 An organic EL device was produced in the same manner as in Example 2-2, except that the varnish obtained in Example 3-1 was used instead of the varnish obtained in Example 2-1.
- Table 28 shows drive voltage, current density, and current efficiency when the device was made to emit light at 5,000 cd / m 2 .
- Table 29 shows current density, luminance, and current efficiency when the device was driven at 9V.
- Table 30 shows the half-life of the luminance of the element (initial luminance of 5,000 cd / m 2 ).
- the device including a thin film obtained from the varnish of the present invention exhibits good EL characteristics and excellent durability. It was.
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Abstract
Description
1.式(T1)で表される2,2,6,6-テトラアルキルピペリジン-N-オキシル誘導体と、電荷輸送性物質と、有機溶媒とを含むことを特徴する電荷輸送性薄膜形成用ワニス、
2.前記2,2,6,6-テトラアルキルピペリジン-N-オキシル誘導体が、2,2,6,6-テトラメチルピペリジン-N-オキシルである1の電荷輸送性薄膜形成用組成物、
3.前記電荷輸送性物質が、分子量200~9,500の電荷輸送性化合物を含むことを特徴する1又は2の電荷輸送性薄膜形成用ワニス、
4.前記電荷輸送性物質が、分子量200~9,500のアリールアミン誘導体及びチオフェン誘導体からなる群から選ばれる少なくとも1種を含むことを特徴とする1~3のいずれかの電荷輸送性薄膜形成用ワニス、
5.更に、フッ素原子含有オリゴアニリン誘導体を含むことを特徴とする1~4のいずれかの電荷輸送性薄膜形成用ワニス、
6.前記フッ素原子含有オリゴアニリン誘導体が、式(6)で表されるものであることを特徴とする5の電荷輸送性薄膜形成用ワニス、
R302~R310は、互いに独立して、水素原子、ハロゲン原子、ニトロ基、シアノ基、又はハロゲン原子で置換されていてもよい、炭素数1~20のアルキル基、炭素数2~20のアルケニル基、炭素数2~20のアルキニル基、炭素数6~20のアリール基若しくは炭素数2~20のヘテロアリール基を表し;
Aは、
シアノ基、塩素原子、臭素原子、ヨウ素原子、ニトロ基若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい、炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基、
シアノ基、塩素原子、臭素原子、ヨウ素原子、ニトロ基、炭素数1~20のアルキル基、炭素数1~20のフルオロアルキル基若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい炭素数6~20のフルオロアリール基、
炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基で置換されるとともに、シアノ基、ハロゲン原子若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい炭素数6~20のアリール基、
シアノ基、塩素原子、臭素原子、ヨウ素原子、ニトロ基、炭素数1~20のフルオロアルコキシ基、炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基で置換されていてもよい炭素数7~20のフルオロアラルキル基、又は
炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基で置換されるとともに、シアノ基、ハロゲン原子若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい炭素数7~20のアラルキル基
を表し;
n1は、1~20の整数を表す。)
7.更にドーパントを含むことを特徴とする1~6のいずれかの電荷輸送性薄膜形成用ワニス、
8.前記ドーパントが、アリールスルホン酸を含むことを特徴とする7の電荷輸送性薄膜形成用ワニス、
9.1~8のいずれかの電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜、
10.9の電荷輸送性薄膜を有する有機EL素子、
11.1~8のいずれかの電荷輸送性薄膜形成用ワニスを用いることを特徴とする、電荷輸送性薄膜の製造方法、
12.1~8のいずれかの電荷輸送性薄膜形成用ワニスを用いることを特徴とする、有機EL素子の製造方法、
13.電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜を有する有機EL素子の駆動電圧を低減する方法であって、
前記電荷輸送性薄膜形成用ワニスとして、1~8のいずれかの電荷輸送性薄膜形成用ワニスを用いることを特徴とする方法、
14.電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜を有する有機EL素子の輝度を向上する方法であって、
前記電荷輸送性薄膜形成用ワニスとして、1~8のいずれかの電荷輸送性薄膜形成用ワニスを用いることを特徴とする方法、
15.電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜を有する有機EL素子の輝度寿命を向上する方法であって、
前記電荷輸送性薄膜形成用ワニスとして、1~8のいずれかの電荷輸送性薄膜形成用ワニスを用いることを特徴とする方法
を提供する。
また、本発明の電荷輸送性薄膜形成用ワニスから得られる薄膜は、帯電防止膜、有機薄膜太陽電池の正孔捕集層等としての使用も期待される。
ジエチレングリコール、トリエチレングリコール、テトラエチレングリコール、ジプロピレングリコール、1,2-エタンジオール(エチレングリコール)、1,2-プロパンジオール(プロピレングリコール)、1,2-ブタンジオール、2,3-ブタンジオール、1,3-ブタンジオール、1,4-ブタンジオール、1,5-ペンタンジオール、2-メチル-2,4-ペンタンジオール(ヘキシレングリコール)、1,3-オクチレングリコール、3,6-オクチレングリコール等のグリコール類;
グリセリン等のトリオール類;
エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノプロピルエーテル、エチレングリコールモノイソプロピルエーテル、エチレングリコールモノブチルエーテル、エチレングリコールモノイソブチルエーテル、エチレングリコールモノヘキシルエーテル等のエチレングリコールモノアルキルエーテル類、プロピレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリコールモノプロピルエーテル、プロピレングリコールモノイソプロピルエーテル、プロピレングリコールモノブチルエーテル、プロピレングリコールモノイソブチルエーテル、プロピレングリコールモノヘキシルエーテル等のプロピレングリコールモノアルキルエーテル類等のアルキレングリコールモノアルキルエーテル類;
エチレングリコールモノフェニルエーテル等のエチレングリコールモノアリールエーテル類、プロピレングリコールモノフェニルエーテル等のプロピレングリコールモノアリールエーテル類等のアルキレングリコールモノアリールエーテル類;
エチレングリコールモノベンジルエーテル等のエチレングリコールモノアラルキルエーテル類、プロピレングリコールモノベンジルエーテル等のプロピレングリコールモノアラルキルエーテル類等のアルキレングリコールモノアラルキルエーテル類;
エチレングリコールブトキシエチルエーテル等のエチレングリコールアルコキシアルキルエーテル類、プロピレングリコールブトキシエチルエーテル等のプロピレングリコールアルコキシアルキルエーテル類等のアルキレングリコールアルコキシアルキルエーテル類;
エチレングリコールジメチルエーテル、エチレングリコールジエチルエーテル、エチレングリコールジプロピルエーテル、エチレングリコールジイソプロピルエーテル、エチレングリコールジブチルエーテル等のエチレングリコールジアルキルエーテル類、プロピレングリコールジメチルエーテル、プロピレングリコールジエチルエーテル、プロピレングリコールジプロピルエーテル、プロピレングリコールジイソプロピルエーテル、プロピレングリコールジブチルエーテル等のプロピレングリコールジアルキルエーテル類等のアルキレングリコールジアルキルエーテル類;
エチレングリコールモノメチルエーテルアセテート、エチレングリコールモノエチルエーテルアセテート、エチレングリコールモノプロピルエーテルアセテート、エチレングリコールモノイソプロピルエーテルアセテート、エチレングリコールモノブチルエーテルアセテート等のエチレングリコールモノアルキルエーテルアセテート類、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノエチルエーテルアセテート、プロピレングリコールモノプロピルエーテルアセテート、プロピレングリコールモノイソプロピルエーテルアセテート、プロピレングリコールモノブチルエーテルアセテート等のプロピレングリコールモノアルキルエーテルアセテート類等のアルキレングリコールモノアルキルエーテルアセテート類;
エチレングリコールモノアセテート等のエチレングリコールモノアセテート類、プロピレングリコールモノアセテート等のプロピレングリコールモノアセテート類等のアルキレングリコールモノアセテート類;
エチレングリコールジアセテート等のエチレングリコールジアセテート類、プロピレングリコールジアセテート等のプロピレングリコールジアセテート類等のアルキレングリコールジアセテート類;
ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノプロピルエーテル、ジエチレングリコールモノイソプロピルエーテル、ジエチレングリコールモノブチルエーテル、ジエチレングリコールモノイソブチルエーテル、ジエチレングリコールモノヘキシルエーテルのジエチレングリコールモノアルキルエーテル類、ジプロピレングリコールモノメチルエーテル、ジプロピレングリコールモノエチルエーテル、ジプロピレングリコールモノプロピルエーテル、ジプロピレングリコールモノイソプロピルエーテル、ジプロピレングリコールモノブチルエーテル、ジプロピレングリコールモノイソブチルエーテル、ジプロピレングリコールモノヘキシルエーテル等のジプロピレングリコールモノアルキルエーテル類等のジアルキレングリコールモノアルキルエーテル類;
ジエチレングリコールモノフェニルエーテル等のジエチレングリコールモノアリールエーテル類、ジプロピレングリコールモノフェニルエーテル等のジプロピレングリコールモノアリールエーテル類等のジアルキレングリコールモノアリールエーテル類;
ジエチレングリコールジメチルエーテル、ジエチレングリコールジエチルエーテル、ジエチレングリコールジプロピルエーテル、ジエチレングリコールジイソプロピルエーテル、ジエチレングリコールジブチルエーテル等のジエチレングリコールジアルキルエーテル類、ジプロピレングリコールジメチルエーテル、ジプロピレングリコールジエチルエーテル、ジプロピレングリコールジプロピルエーテル、ジプロピレングリコールジイソプロピルエーテル、ジプロピレングリコールジブチルエーテル等のジプロピレングリコールジアルキルエーテル類等のジアルキレングリコールジアルキルエーテル類;
ジエチレングリコールモノメチルエーテルアセテート、ジエチレングリコールモノエチルエーテルアセテート、ジエチレングリコールモノプロピルエーテルアセテート、ジエチレングリコールモノイソプロピルエーテルアセテート、ジエチレングリコールモノブチルエーテルアセテート、ジエチレングリコールモノイソブチルエーテルアセテート、ジエチレングリコールモノヘキシルエーテルアセテートのジエチレングリコールモノアルキルエーテルアセテート類、ジプロピレングリコールモノメチルエーテルアセテート、ジプロピレングリコールモノエチルエーテルアセテート、ジプロピレングリコールモノプロピルエーテルアセテート、ジプロピレングリコールモノイソプロピルエーテルアセテート、ジプロピレングリコールモノブチルエーテルアセテート、ジプロピレングリコールモノイソブチルエーテルアセテート、ジプロピレングリコールモノヘキシルエーテルアセテート等のジプロピレングリコールモノアルキルエーテルアセテート類等のジアルキレングリコールモノアルキルエーテルアセテート類;
トリエチレングリコールモノメチルエーテル、トリエチレングリコールモノエチルエーテル等のトリエチレングリコールモノアルキルエーテル類、トリプロピレングリコールモノメチルエーテル、トリプロピレングリコールモノエチルエーテル等のトリプロピレングリコールモノアルキルエーテル類等のトリアルキレングリコールモノアルキルエーテル類;
トリエチレングリコールジメチルエーテル、トリエチレングリコールジエチルエーテル等のトリエチレングリコールジアルキルエーテル類、トリプロピレングリコールジメチルエーテル、トリプロピレングリコールジエチルエーテル等のトリプロピレングリコールジアルキルエーテル類等のトリアルキレングリコールジアルキルエーテル類;
1-プロパノール、2-プロパノール、1-ブタノール、2-ブタノール、1-ペンタノール、1-ヘキサノール、1-ヘプタノール、1-ノナノール、1-デカノール、1-ウンデカノール、1-ドデカノール、1-テトラデカノール等の直鎖脂肪族アルコール類、シクロヘキサノール、2-メチルシクロヘキサノール等の環状脂肪族アルコール類等の脂肪族アルコール類;
フェノール等のフェノール類;
ベンジルアルコール等の芳香族アルコール類;
フルフリルアルコール等の複素環含有アルコール類;
テトラヒドロフルフリルアルコール等の水素化複素環含有アルコール類;
ジイソプロピルエーテル、ジ-n-ブチルエーテル、ジ-n-ヘキシルエーテル等のジアルキルエーテル類;
メチルフェニルエーテル、エチルフェニルエーテル、n-ブチルフェニルエーテル、ベンジル(3-メチルブチル)エーテル、(2-メチルフェニル)メチルエーテル、(3-メチルフェニル)メチルエーテル、(4-メチルフェニル)メチルエーテル等のアルキルアリールエーテル類;
エチルベンジルエーテル等のアルキルアラルキルエーテル類;
2-メチルフラン、テトラヒドロフラン、テトラヒドロピラン等の環状アルキルモノエーテル類;
1,4-ジオキサン等の環状アルキルジエーテル類;
トリオキサン等の環状アルキルトリエーテル類;
ジグリシジルエーテル等のジエポキシアルキルエーテル類;
エチルアセテート、n-プロピルアセテート、イソプロピルアセテート、n-ブチルアセテート、イソブチルアセテート、s-ブチルアセテート、t-ブチルアセテート、n-ペンチルアセテート、(3-メチルブチル)アセテート、n-ヘキシルアセテート、(2-エチルブチル)アセテート、(2-エチルヘキシル)アセテート等の直鎖状又は分岐状アルキルアセテート類、シクロヘキシルアセテート、2-メチルシクロヘキシルアセテート等の環状アルキルアセテート類等のアルキルアセテート類;エチルプロピオネート、n-プロピルプロピオネート、イソプロピルプロピオネート、n-ブチルプロピオネート、イソブチルプロピオネート、s-ブチルプロピオネート、t-ブチルプロピオネート、n-ペンチルプロピオネート、(3-メチルブチル)プロピオネート、n-ヘキシルプロピオネート、(2-エチルブチル)プロピオネート、(2-エチルヘキシル)プロピオネート等の直鎖状又は分岐状アルキルプロピオネート類、シクロヘキシルプロピオネート、2-メチルシクロヘキシルプロピオネート等の環状アルキルプロピオネート類等のアルキルプロピオネート類;エチルブチレート、n-プロピルブチレート、イソプロピルブチレート、n-ブチルブチレート、イソブチルブチレート、s-ブチルブチレート、t-ブチルブチレート、n-ペンチルブチレート、(3-メチルブチル)ブチレート、n-ヘキシルブチレート、(2-エチルブチル)ブチレート、(2-エチルヘキシル)ブチレート等の直鎖状又は分岐状アルキルブチレート類、シクロヘキシルブチレート、2-メチルシクロヘキシルブチレート等の環状アルキルブチレート類等のアルキルブチレート類;エチルラクテート、n-プロピルラクテート、イソプロピルラクテート、n-ブチルラクテート、イソブチルラクテート、s-ブチルラクテート、t-ブチルラクテート、n-ペンチルラクテート、(3-メチルブチル)ラクテート、n-ヘキシルラクテート、(2-エチルブチル)ラクテート、(2-エチルヘキシル)ラクテート等の直鎖状又は分岐状アルキルラクテート類、シクロヘキシルラクテート、2-メチルシクロヘキシルラクテート等の環状アルキルラクテート類等のアルキルラクテート類等のアルキルエステル類;
ベンジルアセテート等のアラルキルアセテート類、ベンジルプロピオネート等のアラルキルプロピオネート類、ベンジルブチレート等のアラルキルブチレート類、ベンジルラクテート等のアラルキルラクテート類等のアラルキルアルキルエステル類;
ジエチルケトン、ジイソブチルケトン、メチルエチルケトン、メチルn-プロピルケトン、メチルn-ブチルケトン、メチルイソブチルケトン、メチルn-プロピルケトン、メチルn-ヘキシルケトン、エチルn-ブチルケトン、ジ-n-プロピルケトン等のジアルキルケトン類;
イソホロン等の環状アルケニルケトン類;
シクロヘキサノン等の環状アルキルケトン類;
4-ヒドロキシ-4-メチル-2-ペンタノン(ジアセトンアルコール)等のヒドロキシジアルキルケトン類;
フルフラール等の複素環含有アルデヒド類;
ヘプタン、オクタン、2,2,3-トリメチルヘキサン、デカン、ドデカン等の直鎖状又は分岐状アルカン類;
トルエン、キシレン、o-キシレン、m-キシレン、p-キシレン、メシチレン、テトラリン、シクロヘキシルベンゼン等のアルキルベンゼン類;
シクロヘキサン、メチルシクロヘキサン、エチルシクロヘキサン等の環状アルカン類
等が挙げられるが、これらに限定されない。これらの溶媒は、1種単独で又は2種以上混合して用いることができる。その使用量は、共に用いる良溶媒の量によって定まる。なお、電荷輸送性物質の種類によっては、前記その他の溶媒は、良溶媒としての機能を兼ね備えることもある。
(a)陽極/正孔注入層/正孔輸送層/発光層/電子輸送層/電子注入層/陰極
(b)陽極/正孔注入層/正孔輸送層/発光層/電子注入輸送層/陰極
(c)陽極/正孔注入輸送層/発光層/電子輸送層/電子注入層/陰極
(d)陽極/正孔注入輸送層/発光層/電子注入輸送層/陰極
(e)陽極/正孔注入層/正孔輸送層/発光層/陰極
(f)陽極/正孔注入輸送層/発光層/陰極
(1)基板洗浄:長州産業(株)製、基板洗浄装置(減圧プラズマ方式)
(2)ワニスの塗布:ミカサ(株)製、スピンコーターMS-A100
(3)膜厚測定:(株)小坂研究所製、微細形状測定機サーフコーダET-4000
(4)有機EL素子の作製:長州産業(株)製、多機能蒸着装置システムC-E2L1G1-N
(5)有機EL素子の輝度等の測定:(有)テック・ワールド製、I-V-L測定システム
(6)有機EL素子の寿命測定(輝度の半減期の測定):(株)イーエッチシー製、有機EL輝度寿命評価システムPEL-105S
[実施例1-1]
式(f)で表されるアリールアミン誘導体0.165gと、式(b-1)で表されるアリールスルホン酸0.325gと、TEMPO(東京化成工業(株)製)0.0245gとを、1,3-ジメチル-2-イミダゾリジノン(DMI)8gに溶解させた。そこへシクロヘキサノール(CHA)12gとプロピレングリコール(PG)4gとを加えて攪拌し、得られた溶液を孔径0.2μmのPTFE製フィルターを用いて濾過し、ワニスを得た。なお、前記アリールアミン誘導体は、国際公開第2013/084664号記載の方法に従って、前記アリールスルホン酸は、国際公開第2006/025342号記載の方法に従って、それぞれ合成した。
式(f)で表されるアリールアミン誘導体0.165gと、式(b-1)で表されるアリールスルホン酸0.325gとを、DMI8gに溶解させた。そこへCHA12gとPG4gとを加えて攪拌し、得られた溶液を孔径0.2μmのPTFE製フィルターを用いて濾過し、ワニスを得た。
TEMPOのかわりに、これと同様に汎用される有機酸化剤である2-アザアダマンタン-N-オキシル(以下、AZADOという。)0.0245gを用いた以外は、実施例1と同様の方法でワニスを得た。なお、AZADOは、国際公開第2010/123115号及び国際公開第2006/001387号、並びにJ. Am. Chem. Soc., 2006, 128 (26), pp. 8412-8413及びそのサポーティングインフォメーションを参考に合成した。
式(J11-79)で表されるアリールアミン誘導体0.147gと、式(b-1)で表されるアリールスルホン酸0.162gと、TEMPO(東京化成工業(株)製)0.0186gとを、DMI3.3gに溶解させた。そこへ2,3-ブタンジオール(2,3-BD)4gとジプロピレングリコールモノメチルエーテル(DPM)2.7gとを加えて攪拌し、得られた溶液を孔径0.2μmのPTFE製フィルターを用いて濾過し、ワニスを得た。なお、前記アリールアミン誘導体は、国際公開第2015/050253号記載の方法に従って合成した。
式(J11-79)で表されるアリールアミン誘導体0.147gと、式(b-1)で表されるアリールスルホン酸0.162gとを、DMI3.3gに溶解させた。そこへ2,3-BD4gと、DPM2.7gとを加えて攪拌し、得られた溶液を孔径0.2μmのPTFE製フィルターを用いて濾過し、ワニスを得た。
式(f)で表されるアリールアミン誘導体0.084gと、式(E-138)で表されるフッ素原子含有オリゴアニリン誘導体0.013gと、式(b-1)で表されるアリールスルホン酸0.208gと、TEMPO(東京化成工業(株)製)0.0216gとを、DMI3.3gに溶解させた。そこへ2,3-BD4gとDPM2.7gとを加えて攪拌し、得られた溶液を孔径0.2μmのPTFE製フィルターを用いて濾過し、ワニスを得た。
式(f)で表されるアリールアミン誘導体0.084gと、式(E-138)で表されるフッ素原子含有オリゴアニリン誘導体0.013gと、式(b-1)で表されるアリールスルホン酸0.208gとを、DMI3.3gに溶解させた。そこへ2,3-BD4gとDPM2.7gとを加えて攪拌し、得られた溶液を孔径0.2μmのPTFE製フィルターを用いて濾過し、ワニスを得た。
攪拌終了後、5mol/L水酸化ナトリウム水溶液を30mL加え、更に30分攪拌した。反応液に酢酸エチル及び飽和食塩水を混合してpHが7になるまで分液処理を行った(3回)。得られた有機層を硫酸ナトリウムで乾燥し、次いで、減圧濃縮をおこなった。この濃縮液に、THF15mLを加えた。この溶液をイソプロピルアルコール210mLに滴下し、得られたスラリーを室温で30分間攪拌した。
最後に、スラリー溶液をろ過し、得られたろ物を乾燥して、目的とするフッ素原子含有オリゴアニリン誘導体を得た(収量2.94g)。1H-NMR測定の結果を以下に示す。
1H-NMR (400MHz, DMSO-d6) δ[ppm]: 10.35(s, 1H), 7.83(s, 1H), 7.79-7.68(m, 3H), 7.49(d, J=8.0Hz, 2H), 7.15(t, J=8.0Hz, 2H), 7.01-6.90(m, 12H), 6.68(t, J=8.0Hz, 1H)
[実施例1-2]
実施例1-1で得られたワニスを、スピンコーターを用いてITO基板に塗布した後、80℃で1分間乾燥し、更に、大気雰囲気下、180℃で15分間焼成し、ITO基板上に30nmの均一な薄膜を形成した。ITO基板としては、インジウム錫酸化物(ITO)が表面上に膜厚150nmでパターニングされた25mm×25mm×0.7tのガラス基板を用い、使用前にO2プラズマ洗浄装置(150W、30秒間)によって表面上の不純物を除却した。
次いで、薄膜を形成したITO基板に対し、蒸着装置(真空度1.0×10-5Pa)を用いてα-NPDを0.2nm/秒にて30nm成膜した。次に、CBPとIr(PPy)3を共蒸着した。共蒸着はIr(PPy)3の濃度が6%になるように蒸着レートをコントロールし、40nm積層させた。次いで、BAlq、フッ化リチウム及びアルミニウムの薄膜を順次積層して有機EL素子を得た。この際、蒸着レートは、BAlq及びアルミニウムについては0.2nm/秒、フッ化リチウムについては0.02nm/秒の条件でそれぞれ行い、膜厚は、それぞれ20nm、0.5nm及び100nmとした。
なお、空気中の酸素、水等の影響による特性劣化を防止するため、有機EL素子は封止基板により封止した後、その特性を評価した。封止は、以下の手順で行った。酸素濃度2ppm以下、露点-85℃以下の窒素雰囲気中で、有機EL素子を封止基板の間に収め、封止基板を接着材(ナガセケムテックス(株)製、XNR5516Z-B1)により貼り合わせた。この際、捕水剤(ダイニック(株)製、HD-071010W-40)を有機EL素子と共に封止基板内に収めた。貼り合わせた封止基板に対し、UV光を照射(波長:365nm、照射量:6,000mJ/cm2)した後、80℃で1時間、アニーリング処理して接着材を硬化させた。
実施例1-1で得られたワニスのかわりに、比較例1-1A又は比較例1-1Bで得られたワニスを用いた以外は、実施例1-2と同様の方法で、有機EL素子を作製した。
実施例2-1で得られたワニスを、スピンコーターを用いてITO基板に塗布した後、80℃で1分間乾燥し、更に、大気雰囲気下、180℃で15分間焼成し、ITO基板上に65nmの均一な薄膜を形成した。ITO基板としては、インジウム錫酸化物(ITO)が表面上に膜厚150nmでパターニングされた25mm×25mm×0.7tのガラス基板を用い、使用前にO2プラズマ洗浄装置(150W、30秒間)によって表面上の不純物を除却した。
次いで、薄膜を形成したITO基板に対し、蒸着装置(真空度1.0×10-5Pa)を用いてα-NPDを0.2nm/秒にて30nm成膜した。次に、CBPとIr(PPy)3を共蒸着した。共蒸着はIr(PPy)3の濃度が6%になるように蒸着レートをコントロールし、40nm積層させた。次いで、BAlq、フッ化リチウム及びアルミニウムの薄膜を順次積層して有機EL素子を得た。この際、蒸着レートは、BAlq及びアルミニウムについては0.2nm/秒、フッ化リチウムについては0.02nm/秒の条件でそれぞれ行い、膜厚は、それぞれ20nm、0.5nm及び100nmとした。
なお、空気中の酸素、水等の影響による特性劣化を防止するため、有機EL素子は封止基板により封止した後、その特性を評価した。封止は、実施例1-2と同じ手順で行った。
実施例2-1で得られたワニスのかわりに、比較例2-1で得られたワニスを用いた以外は、実施例2-2と同様の方法で、有機EL素子を作製した。
実施例2-1で得られたワニスのかわりに、実施例3-1で得られたワニスを用いた以外は、実施例2-2と同様の方法で、有機EL素子を作製した。
実施例2-1で得られたワニスのかわりに、比較例3-1で得られたワニスを用いた以外は、実施例2-2と同様の方法で、有機EL素子を作製した。
Claims (15)
- 前記2,2,6,6-テトラアルキルピペリジン-N-オキシル誘導体が、2,2,6,6-テトラメチルピペリジン-N-オキシルである請求項1記載の電荷輸送性薄膜形成用組成物。
- 前記電荷輸送性物質が、分子量200~9,500の電荷輸送性化合物を含むことを特徴する請求項1又は2記載の電荷輸送性薄膜形成用ワニス。
- 前記電荷輸送性物質が、分子量200~9,500のアリールアミン誘導体及びチオフェン誘導体からなる群から選ばれる少なくとも1種を含むことを特徴とする請求項1~3のいずれか1項記載の電荷輸送性薄膜形成用ワニス。
- 更に、フッ素原子含有オリゴアニリン誘導体を含むことを特徴とする請求項1~4のいずれか1項記載の電荷輸送性薄膜形成用ワニス。
- 前記フッ素原子含有オリゴアニリン誘導体が、式(6)で表されるものであることを特徴とする請求項5記載の電荷輸送性薄膜形成用ワニス。
(式中、R301は、水素原子、又はZで置換されていてもよい炭素数1~20のアルキル基を表し、Zは、ハロゲン原子、ニトロ基、シアノ基、アルデヒド基、ヒドロキシ基、チオール基、スルホン酸基、カルボキシ基、Z'で置換されていてもよい炭素数6~20のアリール基又はZ'で置換されていてもよい炭素数2~20のヘテロアリール基を表し、Z'は、ハロゲン原子、ニトロ基、シアノ基、アルデヒド基、ヒドロキシ基、チオール基、スルホン酸基又はカルボキシ基を表し;
R302~R310は、互いに独立して、水素原子、ハロゲン原子、ニトロ基、シアノ基、又はハロゲン原子で置換されていてもよい、炭素数1~20のアルキル基、炭素数2~20のアルケニル基、炭素数2~20のアルキニル基、炭素数6~20のアリール基若しくは炭素数2~20のヘテロアリール基を表し;
Aは、
シアノ基、塩素原子、臭素原子、ヨウ素原子、ニトロ基若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい、炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基、
シアノ基、塩素原子、臭素原子、ヨウ素原子、ニトロ基、炭素数1~20のアルキル基、炭素数1~20のフルオロアルキル基若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい炭素数6~20のフルオロアリール基、
炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基で置換されるとともに、シアノ基、ハロゲン原子若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい炭素数6~20のアリール基、
シアノ基、塩素原子、臭素原子、ヨウ素原子、ニトロ基、炭素数1~20のフルオロアルコキシ基、炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基で置換されていてもよい炭素数7~20のフルオロアラルキル基、又は
炭素数1~20のフルオロアルキル基、炭素数3~20のフルオロシクロアルキル基、炭素数4~20のフルオロビシクロアルキル基、炭素数2~20のフルオロアルケニル基若しくは炭素数2~20のフルオロアルキニル基で置換されるとともに、シアノ基、ハロゲン原子若しくは炭素数1~20のフルオロアルコキシ基で置換されていてもよい炭素数7~20のアラルキル基
を表し;
n1は、1~20の整数を表す。) - 更にドーパントを含むことを特徴とする請求項1~6のいずれか1項記載の電荷輸送性薄膜形成用ワニス。
- 前記ドーパントが、アリールスルホン酸を含むことを特徴とする請求項7記載の電荷輸送性薄膜形成用ワニス。
- 請求項1~8のいずれか1項記載の電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜。
- 請求項9記載の電荷輸送性薄膜を有する有機エレクトロルミネッセンス素子。
- 請求項1~8のいずれか1項記載の電荷輸送性薄膜形成用ワニスを用いることを特徴とする、電荷輸送性薄膜の製造方法。
- 請求項1~8のいずれか1項記載の電荷輸送性薄膜形成用ワニスを用いることを特徴とする、有機エレクトロルミネッセンス素子の製造方法。
- 電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜を有する有機エレクトロルミネッセンス素子の駆動電圧を低減する方法であって、
前記電荷輸送性薄膜形成用ワニスとして、請求項1~8のいずれか1項記載の電荷輸送性薄膜形成用ワニスを用いることを特徴とする方法。 - 電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜を有する有機エレクトロルミネッセンス素子の輝度を向上する方法であって、
前記電荷輸送性薄膜形成用ワニスとして、請求項1~8のいずれか1項記載の電荷輸送性薄膜形成用ワニスを用いることを特徴とする方法。 - 電荷輸送性薄膜形成用ワニスを用いて製造される電荷輸送性薄膜を有する有機エレクトロルミネッセンス素子の輝度寿命を向上する方法であって、
前記電荷輸送性薄膜形成用ワニスとして、請求項1~8のいずれか1項記載の電荷輸送性薄膜形成用ワニスを用いることを特徴とする方法。
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| WO2018016343A1 (ja) * | 2016-07-19 | 2018-01-25 | 日産化学工業株式会社 | 電荷輸送性薄膜形成用ワニス |
| US20180151805A1 (en) * | 2015-05-27 | 2018-05-31 | Nissan Chemical Industries, Ltd. | Charge-transporting varnish, and organic electroluminescent element |
| WO2018135582A1 (ja) * | 2017-01-18 | 2018-07-26 | 日産化学工業株式会社 | インク組成物 |
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| JPWO2018016343A1 (ja) * | 2016-07-19 | 2019-05-16 | 日産化学株式会社 | 電荷輸送性薄膜形成用ワニス |
| JP2022022288A (ja) * | 2017-01-18 | 2022-02-03 | 日産化学株式会社 | インク組成物 |
| JPWO2018135582A1 (ja) * | 2017-01-18 | 2019-11-07 | 日産化学株式会社 | インク組成物 |
| WO2018135582A1 (ja) * | 2017-01-18 | 2018-07-26 | 日産化学工業株式会社 | インク組成物 |
| JP7077944B2 (ja) | 2017-01-18 | 2022-05-31 | 日産化学株式会社 | インク組成物 |
| WO2019124412A1 (ja) | 2017-12-20 | 2019-06-27 | 日産化学株式会社 | スルホン酸エステル化合物及びその利用 |
| WO2020022211A1 (ja) * | 2018-07-24 | 2020-01-30 | 日産化学株式会社 | 電荷輸送性組成物 |
| KR20210036937A (ko) * | 2018-07-24 | 2021-04-05 | 닛산 가가쿠 가부시키가이샤 | 전하 수송성 조성물 |
| JPWO2020022211A1 (ja) * | 2018-07-24 | 2021-08-26 | 日産化学株式会社 | 電荷輸送性組成物 |
| JP7435446B2 (ja) | 2018-07-24 | 2024-02-21 | 日産化学株式会社 | 電荷輸送性組成物 |
| KR102753157B1 (ko) | 2018-07-24 | 2025-01-14 | 닛산 가가쿠 가부시키가이샤 | 전하 수송성 조성물 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6597642B2 (ja) | 2019-10-30 |
| KR20170106384A (ko) | 2017-09-20 |
| KR102537423B1 (ko) | 2023-05-26 |
| EP3252840B1 (en) | 2020-03-11 |
| US10301484B2 (en) | 2019-05-28 |
| EP3252840A1 (en) | 2017-12-06 |
| TW201641619A (zh) | 2016-12-01 |
| US20180002539A1 (en) | 2018-01-04 |
| JPWO2016117521A1 (ja) | 2017-11-02 |
| CN107210377A (zh) | 2017-09-26 |
| CN107210377B (zh) | 2019-07-05 |
| EP3252840A4 (en) | 2018-08-29 |
| TWI678401B (zh) | 2019-12-01 |
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