WO2009008543A1 - 有機発光素子の製造方法 - Google Patents
有機発光素子の製造方法 Download PDFInfo
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- WO2009008543A1 WO2009008543A1 PCT/JP2008/062776 JP2008062776W WO2009008543A1 WO 2009008543 A1 WO2009008543 A1 WO 2009008543A1 JP 2008062776 W JP2008062776 W JP 2008062776W WO 2009008543 A1 WO2009008543 A1 WO 2009008543A1
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- electron
- organic compound
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- 125000001033 ether group Chemical group 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 125000005368 heteroarylthio group Chemical group 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 125000002883 imidazolyl group Chemical group 0.000 description 1
- 125000005462 imide group Chemical group 0.000 description 1
- 150000002466 imines Chemical group 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 150000003951 lactams Chemical group 0.000 description 1
- 125000000686 lactone group Chemical group 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical group CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate group Chemical group C(C(=C)C)(=O)[O-] CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N methoxybenzene Substances CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- DCZNSJVFOQPSRV-UHFFFAOYSA-N n,n-diphenyl-4-[4-(n-phenylanilino)phenyl]aniline Chemical class C1=CC=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 DCZNSJVFOQPSRV-UHFFFAOYSA-N 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- VOFUROIFQGPCGE-UHFFFAOYSA-N nile red Chemical compound C1=CC=C2C3=NC4=CC=C(N(CC)CC)C=C4OC3=CC(=O)C2=C1 VOFUROIFQGPCGE-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000003566 oxetanyl group Chemical group 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical class N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 150000004322 quinolinols Chemical class 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000001022 rhodamine dye Substances 0.000 description 1
- YYMBJDOZVAITBP-UHFFFAOYSA-N rubrene Chemical compound C1=CC=CC=C1C(C1=C(C=2C=CC=CC=2)C2=CC=CC=C2C(C=2C=CC=CC=2)=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 YYMBJDOZVAITBP-UHFFFAOYSA-N 0.000 description 1
- 239000005394 sealing glass Substances 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 150000003553 thiiranes Chemical group 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- IBBLKSWSCDAPIF-UHFFFAOYSA-N thiopyran Chemical compound S1C=CC=C=C1 IBBLKSWSCDAPIF-UHFFFAOYSA-N 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 125000001834 xanthenyl group Chemical group C1=CC=CC=2OC3=CC=CC=C3C(C12)* 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
-
- 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]
- H10K50/18—Carrier blocking layers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/40—Thermal treatment, e.g. annealing in the presence of a solvent vapour
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/30—Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/10—Transparent electrodes, e.g. using graphene
- H10K2102/101—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO]
- H10K2102/103—Transparent electrodes, e.g. using graphene comprising transparent conductive oxides [TCO] comprising indium oxides, e.g. ITO
Definitions
- the present invention relates to a method for manufacturing an organic light emitting device.
- An organic light-emitting element is an element including an organic compound (organic light-emitting material) that emits light by current injection from a pair of electrodes. The energy when the electrons supplied from the cathode and the holes supplied from the anode are recombined in the organic light emitting material is taken out as light.
- an organic light-emitting device an organic light-emitting device having an organic layer containing a polymer compound is known. [For example, Non-Patent Documents 1 and 2] In this device, an organic layer can be easily formed by wet coating. This is advantageous for large area and low cost.
- Non-Patent Document 3 As an organic light emitting device using a polymer compound, an organic light emitting device having a layer made of PED0T: PSS (poly (3,4-ethylenedioxythiophene) ⁇ polystyrenesulfonic acid) in contact with an anode is known.
- PSS poly (3,4-ethylenedioxythiophene) ⁇ polystyrenesulfonic acid
- This organic light-emitting device is manufactured by a manufacturing method including a step of forming a layer on the anode using an acidic aqueous solution containing PED0T: PSS. Etc.
- Non-Patent Document 1 Appl. Phys. Lett., 58 (1991) pp.1982
- Non-Patent Document 2 Jpn. J. Appl. Phys., 30 (1991) pp.L1941
- Non-Patent Document 3 Appl. Phys. Lett., 84 (2004) pp.921 Disclosure of the Invention
- the organic light-emitting device manufactured by the above-described known manufacturing method is not always easy to handle PED0T: PSS used for manufacturing, and the device performance and the like are not necessarily high. not enough. There was a case.
- An object of the present invention is to provide a method for producing an organic light-emitting device that can easily provide an organic light-emitting device excellent in light emission luminance and light emission efficiency.
- the present invention has an anode, a layer containing an electron-accepting organic compound, a hole transport layer containing an organic compound, a light-emitting layer containing a polymer compound, and a cathode in this order.
- a method for producing an organic light-emitting device wherein the layer containing the electron-accepting organic compound is in contact with the anode and the hole transport layer,
- a method for producing an organic light-emitting device comprising: forming a layer containing the electron-accepting organic compound using a composition containing the electron-accepting organic compound and an organic solvent and melting the film. It is to provide.
- FIG. 1 is a schematic structural view of an organic light-emitting device of the present invention.
- An anode of an organic light emitting device manufactured by the manufacturing method of the present invention supplies holes to a layer containing an electron-accepting organic compound, a hole transporting layer, a light emitting layer, and the like. Yes, it is preferable to have a work function of 4.5 eV or more.
- the material for the anode include metals, alloys, metal oxides, electrically conductive compounds, and mixtures thereof.
- anode materials include conductive metal oxides such as tin oxide, zinc oxide, indium oxide, and indium tin oxide (IT0), or metals such as gold, silver, chromium, and nickel. Examples thereof include a mixture or a laminate of a metal oxide and a metal. Further, from the viewpoint of preventing a short circuit, the center line average roughness (Ra) of the anode surface on the side in contact with the layer containing the electron-accepting organic compound is
- Ra can be measured according to JIS-B0651 to JIS-B065 6 and JIS-B0671-1, etc., based on Japanese Industrial Standard JIS JIS-B0601-2001.
- the electron-accepting organic compound used in the layer containing the electron-accepting organic compound included in the organic light-emitting device produced by the production method of the present invention has an oxidation-reduction half-wave potential E / 2 measured under the following conditions.
- a compound satisfying the above condition is preferable from the viewpoint of the hole injection property from the anode.
- SCE saturated calomel electrode
- TAA ⁇ BF4 tetraptoyl ammonium tetrafluoroborate
- electron-accepting organic compounds include P-benzoquinone derivatives, tetracyanoquinodimethane derivatives, 1,4-mononaphthoquinone derivatives, diphenoquinone derivatives, and fluorene derivatives.
- Electron-accepting organic compounds are p-benzoquinone derivatives And at least one selected from the group consisting of tetracyanoquinodimethane derivatives.
- diphenoquinone derivative examples include 3,3 ′, 5,5′-tetrabromo-diphenoquinone (TBDQ).
- TCNQ Tetracyanoquinodimethane
- Eaw the work function energy of the anode
- LUM0 the lowest vacant molecular orbital
- the electron-accepting organic compound has the highest occupied molecular orbital (HOMO) energy of the organic compound contained in the hole transport layer as Ehl, and the lowest vacant molecule of the electron-accepting organic compound.
- HOMO occupied molecular orbital
- the layer containing an electron-accepting organic compound included in the organic light-emitting device produced by the production method of the present invention may contain two or more kinds of electron-accepting organic compounds, and contains an organic compound other than the electron-accepting organic compounds. You may go out.
- organic compounds other than electron-accepting organic compounds include force rubazol derivatives, triazole derivatives, oxazole derivatives, oxaziazole derivatives, imidazolyl derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, F: n Direndiamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, styryl anthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aromatic tertiary amine compounds, styrylamine compounds, aromatic dimethylidin compounds Porphyrin compounds, polysilane compounds, poly (N-vinylcarbazole) derivatives, organic silane derivatives, and polymers containing these structures, aniline copolymers, thiophene oligomers -Conductive polymers such as polythiophene, organic conductive materials such as oligomers, polypyr
- the hole transport layer containing an organic compound included in the organic light emitting device produced by the production method of the present invention has a function of injecting holes from the anode side layer into the light emitting layer side layer, and a function of transporting holes. As long as it has either of these.
- the organic compound used for the hole transport layer is usually a hole transport material.
- As the hole transporting material known materials can be appropriately selected and used.
- Examples thereof include carbazole derivatives, triazole derivatives, oxazole derivatives, oxaziazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, Lazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aromatic tertiary amine compounds, styrylamine compounds, aromatic dimethylidin series Compounds, porphyrin compounds, polysilane compounds, poly (N-vinylcarbazol) derivatives, organosilane derivatives, polymers containing these structures, aniline copolymers, thio Examples thereof include conductive polymer oligomers such as fenoligo-oma, polythiophene, and organic conductive materials such as polypyrrole.
- the material may be a single component or a composition comprising a plurality of components.
- the hole transport layer may have a single layer structure composed of one or more of the materials described above, or may have a multilayer structure composed of a plurality of layers having the same composition or different compositions.
- Examples of hole transporting materials include JP-A 63-70257 and JP-A 63-175.
- Examples thereof include compounds disclosed in 988, JP-A-3-37992, JP-A-3-152184, JP-A-5-263073, JP-A-6-1972, O2005 / 52027, JP-A-2006-295203, and the like.
- a polymer containing a repeating unit containing a structure of an aromatic tertiary amine compound is preferable.
- repeating unit including the structure of the aromatic tertiary amine compound examples include a repeating unit represented by the following general formula (1).
- Ar Ar 2 , Ar 3 and Ar 4 each independently represent an arylene group which may have a substituent or a divalent heterocyclic group which may have a substituent
- Ar 5 , Ar 6 and Ar 7 each independently represent an aryl group which may have a substituent or a monovalent heterocyclic group which may have a substituent
- n and m each independently represent 0 or 1 is represented, 0 ⁇ n + m ⁇ 2.
- Ar 1 and Ar 3 may be bonded directly or via a divalent group such as 0 or S.
- substituents examples include a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an arylthio group, an aryl alkyl group, an arylalkyloxy group, an arylalkylthio group, an alkenyl group, an alkynyl group.
- Substituents are vinyl group, acetylene group, butenyl group, acrylic group, acrylate group, acrylamide group, methacryl group, methacrylate group, methacrylamide group, biether ether group, vinylamino group, silanol group, small ring (for example, Cyclopropyl group, cyclobutyl group, epoxy group, oxetane group, diketene group, episulfide group, etc.), lactone group, lactam group, or siloxane It may be a crosslinking group such as a group containing a derivative structure.
- the crosslinking group means a substituent having a function of linking polymer chains.
- a combination of groups capable of forming an ester bond or an amide bond for example, an ester group and an amino group, an ester group and a hydroxyl group, etc. can be used as a crosslinking group.
- Examples of the arylene group include a phenylene group, and examples of the divalent heterocyclic group include a pyridinediyl group. These groups may have a substituent.
- Examples of the aryl group include a phenyl group and a naphthyl group.
- Examples of the monovalent heterocyclic group include a pyridyl group, and these groups may have a substituent.
- Examples of the repeating unit represented by the above formula (1) include the following repeating units and repeating units formed by bonding a substituent to these.
- the polymer containing a repeating unit containing the structure of an aromatic tertiary amine compound may further have another repeating unit.
- Other repeating units include arylene groups such as a phenylene group and a fluorenedyl group.
- the hole transport layer and the light-emitting layer are in contact with each other, if both layers are formed by a coating method, the previously applied layer (lower layer) dissolves in the solvent contained in the later applied layer (upper layer). Thus, it may be difficult to create a laminated structure. In this case, a method of making the lower layer solvent insoluble can be used.
- a polymer compound having a crosslinking group As a method for making the solvent insoluble, as a material for the lower layer, a polymer compound having a crosslinking group A method in which a low molecular compound having a crosslinking group having an aromatic ring typified by an aromatic bisazide is mixed as a crosslinking agent, a low molecular compound having a crosslinking group having no aromatic ring typified by an acrylate group And a method in which the lower layer is heated and insolubilized in the solvent used to form the upper layer. When the lower layer is heated, the heating temperature is usually about 150 ° to 300 ° C., and the time is usually about 1 minute to 1 hour.
- Another method of laminating without dissolving the lower layer is to use solutions of different polarities in adjacent layers.
- a water-soluble polymer compound is used for the lower layer and an oil-soluble polymer compound for the upper layer.
- the hole transporting material is a low molecular compound (low molecular hole transporting material) such as a pyrazoline derivative, an arylamine derivative, a stilbene derivative, a triphenyldiamine derivative, etc.
- hole transport is performed using a vacuum deposition method.
- a layer can be formed.
- These low-molecular hole-transport materials can be poly (N-vinylcarbazol), polyaniline or derivatives thereof, polythiophene or derivatives thereof, poly (p-phenylene diylene) or derivatives thereof, poly ( 2,5-Chenylenevinylene) or its derivatives, polycarbonate, polyacrylate, polymethyl acrylate, polymethyl methacrylate, polystyrene, polyvinyl chloride, polysiloxane, etc.
- the hole transport layer may be formed by a coating method using a mixed solution dispersed in a polymer compound that does not absorb strongly.
- the highest occupied molecular orbital (HOMO) energy of the hole transporting material contained in the hole transporting layer of the organic light emitting device of the present invention is Ehh
- the lowest vacant molecular orbital (LU M0) energy of the electron-accepting organic compound is If Eal,
- a hole transporting material satisfying the above conditions is preferable.
- the light emitting layer of the organic light emitting device of the present invention is capable of injecting holes from the layer adjacent to the anode side and injecting electrons from the layer adjacent to the cathode side when an electric field is applied.
- the organic light-emitting device of the present invention has a function of moving injected charges (electrons and holes) by the force of an electric field, a function of recombination of electrons and holes, and a function of connecting this to light emission.
- Examples of the polymer compound contained in the light emitting layer include a polymer light emitting material capable of emitting fluorescence or phosphorescence.
- Polymer light-emitting materials include known polymer light-emitting materials such as polyfluorene derivatives (PF), polyparaphenylenevinylene derivatives (PPV), polyphenylene derivatives (PP), polyparaphenylene derivatives (PPP), polythiophene derivatives, Conjugated polymer compounds such as polydialkylfluorene (PDAF), polyfluorene benzothiadiazole (PFBT), and polyalkylthiophene (PAT) can be suitably used.
- PF polyfluorene derivatives
- PV polyparaphenylenevinylene derivatives
- PP polyphenylene derivatives
- PPP polyparaphenylene derivatives
- PPP polythiophene derivatives
- Conjugated polymer compounds such as polydialkylfluorene (PDAF), polyfluorene benzothiadiazole (PFBT), and polyalkylthiophene (PAT) can be suitably used.
- PDAF polydialkylfluorene
- the light-emitting layer further comprises perylene dyes, coumarin dyes, rhodamine dyes, rubrene, perylene, 9,10-diphenylanthracene, tetraphenylbutadiene, nile red, coumarin 6, quinacridone, naphthenic derivatives, anthracene Or a derivative thereof, perylene or a derivative thereof, a dye such as a polymethine group, a xanthene group or a cyanine group, a metal complex of 8-hydroxyquinoline or a derivative thereof, an aromatic amine, a tetraphenylcyclopentene or a derivative thereof, or An organic dye compound such as tetraphenylbutadiene or a derivative thereof may be contained.
- polymer light emitting materials examples include WO 99 13692, WO 99/48160, GB 2340304 A, WO 00/53656, WO 01 no 19834, WOO 0/55927, GB 2348316, WO 00/46321, WO 00/06 665, W0 99/54943, WO 99/54385, US 5777070, WO 98/06773, WO 97X05184, WO 00/35987, WO 0 0/53655, WO 01/34722, WO 99/24526.
- polymer compound contained in the light emitting layer of the organic light emitting device of the present invention examples include non-conjugated high molecular compounds [for example, polyvinyl carbazole, polyvinyl chloride, polycarbonate, polystyrene, polymethyl methacrylate, polybutyl methacrylate, polyester, Polysulfone, Polyphenylene oxide, Polybutadiene, Poly (N-vinylcarbazole), Hydrocarbon resin, Ketone resin, Phenoxy resin, Polyamide, Ethyl cellulose, Vinyl acetate, ABS resin, Polyurethane, Melamine resin, Unsaturated polyester resin, Alkyd Resin, Epoxy resin, Silicone resin, Power rubazole derivative, Triazole derivative, Oxazole derivative, Oxadiazole derivative, Imidazol derivative, Polyarylalkane derivative, Pyrazo Derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone
- the light emitting layer may be composed of, for example, a composition of a non-conjugated polymer compound and the organic dye compound.
- the low molecular weight organic dye compound include compounds described in JP-A-5-7-5 1 781, JP-A-59-919493, and the like.
- the electron injection layer and the electron transport layer that the organic light emitting device of the present invention can have are any one of a function of injecting electrons from the negative electrode, a function of transporting electrons, and a function of blocking holes injected from the anode. What is necessary is just to have.
- materials for the electron injection layer and the electron transport layer known materials can be appropriately selected and used.
- Examples thereof include triazole derivatives, oxazole derivatives, oxadiazole derivatives, imidazole derivatives, fluorenone derivatives, anthraquinodimethane derivatives. , Anthrone derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, carpositimide derivatives, fluorenylidenemethane derivatives, distyrylvirazine derivatives, naphthalene, perylene aromatic ring tetracarboxylic anhydrides, phthalocyanine derivatives, 8 —Metalin complexes of quinolinol derivatives include metal phthalocyanines, various metal complexes represented by metal complexes having benzoxazole and benzothiazole as ligands, and organosilane derivatives.
- the electron injection layer and the electron transport layer may have a single layer structure composed of one or more of the materials, or may have a multilayer structure composed of a plurality of layers having the same composition or different compositions.
- the preferred film thickness of each organic layer in the organic light-emitting device of the present invention varies depending on the type of material and the layer structure and is not particularly limited, but in general, if the film thickness is too thin, defects such as pinholes tend to occur. On the other hand, if it is too thick, a high applied voltage is required and the efficiency tends to deteriorate, so the range of several nm to 1 m is preferable.
- the cathode of the organic light emitting device of the present invention supplies electrons to an electron injection layer, an electron transport layer, a light emitting layer and the like.
- a material of the cathode a metal, an alloy, a metal halide, a metal oxide, An electrically conductive compound or a mixture thereof can be used.
- cathode materials include alkali metals (Li, Na, K, etc.) and their fluorides or oxides, alkaline earth metals (Mg, Ca, Ba, Cs, etc.) and their fluorides.
- oxides gold, silver, lead, aluminum, alloys or mixed metals [sodium-potassium alloys, sodium-potassium mixed metals, lithium-aluminum alloys, lithium-aluminum mixed metals, magnesium-silver alloys or magnesium-silver Mixed metals, etc.], rare earth metals [indium, ytterbium, etc.], and laminates thereof.
- alloys or mixed metals sodium-potassium alloys, sodium-potassium mixed metals, lithium-aluminum alloys, lithium-aluminum mixed metals, magnesium-silver alloys or magnesium-silver Mixed metals, etc.
- rare earth metals indium, ytterbium, etc.
- An anode made of indium tin oxide (IT0) is formed on a glass or plastic substrate, a layer containing an electron-accepting organic compound is formed on the surface of the anode, and a hole transport layer is formed thereon, A structure in which a light emitting layer is formed thereon and a cathode is formed thereon is desirable.
- the production method of the present invention includes the above organic light-emitting device, that is, an anode, a layer containing an electron-accepting organic compound, a hole transport layer containing an organic compound, a light-emitting layer containing a polymer compound, and a cathode.
- the layer containing the electron-accepting organic compound is in contact with the anode and the hole transport layer, and the layer containing the electron-accepting organic compound comprises: Using a composition containing the electron-accepting organic compound and an organic solvent Create a film and melt it to form.
- a composition containing the electron-accepting organic compound and an organic solvent Create a film and melt it to form.
- the organic solvent a stable solvent in which the constituent components of the layer are uniformly dissolved or dispersed can be appropriately selected from known solvents.
- solvents examples include alcohols (methanol, ethanol, isopropyl alcohol, etc.), nitrile solvents (acetonitrile, benzonitrile, etc.), ketones (acetone, methyl edyl ketone, etc.) Organic chlorine (black mouth form, 1,2-dichloroethane, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), aliphatic hydrocarbons (normal hexane, cyclohexane, etc.), amide [Dimethylformamide, etc.] and sulfoxides [dimethylsulfoxide etc.].
- the solvent may be a single component or a mixture of a plurality of components.
- the electron-accepting organic compound when TCNQ or F4-TCNQ is used as the electron-accepting organic compound, acetonitrile is preferred as the organic solvent.
- concentration of the electron-accepting organic compound in the solvent is not particularly limited, but is usually 0.5% by weight or more and 10% by weight or less.
- the composition may contain a resin, and the resin can be dissolved in an organic solvent or dispersed.
- the resin include non-conjugated polymers (for example, polyvinyl carbazole) and conjugated polymers (for example, polyolefin polymers).
- the composition may contain an antioxidant, a viscosity modifier, etc. depending on the purpose.
- a coating method [casting method, spin coating method, bar coating method, blade coating method, roll coating method, gravure printing, screen printing, Inkjet method is preferred.
- a film can be formed by coating the composition on a desired layer (or anode).
- known components can be used for the discharge and reproducibility of the ink.
- a high boiling point solvent anisole, bicyclohexylbenzene, etc.
- anisole, bicyclohexylbenzene, etc. can be used as a component in order to suppress evaporation from the nozzle. It is preferable to select the components so that the viscosity of the solution is 1 to 10 O mPa's.
- the atmosphere of application is not particularly limited, and may be air or an inert atmosphere.
- the drying temperature is not particularly limited, but is in the range of about 15 to 30 ° C.
- the drying atmosphere is not particularly limited, and may be an application atmosphere.
- the drying time is usually about 1 to 10 minutes. In the production method of the present invention, a film is prepared using the above composition, and the film is melted.
- Melting is usually performed by heating, but the heating temperature varies depending on the composition and is not particularly limited as long as the film is melted, but it is usually about 100 ° C to 300 t: about, for example, with acetonitrile.
- the preferred temperature when using a composition of F4-TCNQ is 150 ° C to 250 ° C.
- the melting time is not particularly limited as long as the prepared film is melted, but it is usually 3 to 30 minutes, for example, when using a mixed composition of acetonitrile and F4-TCNQ.
- the time is 5 to 15 minutes.
- the melting atmosphere is not particularly limited, and may be in air or in an inert atmosphere. After melting the membrane, cool it below the heating temperature, usually at room temperature, and return the melted and liquid phase to the solid phase. It can be confirmed by visual observation that the film has been melted, for example, by comparing the film thickness before and after melting with a stylus type step gauge.
- the film thickness after melting is 1
- an anode, a layer containing an electron-accepting organic compound, a hole transport layer containing an organic compound, a light-emitting layer containing a polymer compound, and a cathode are formed in this order.
- the cathode, the light emitting layer containing the polymer compound, the hole transport layer containing the organic compound, the layer containing the electron accepting organic compound, and the anode may be formed in this order.
- the method for forming the layer is not particularly limited, and a known method can be used.
- the coating method [casting method, spin coat method, bar coat method, blade coat method, roll coat method, It is preferable to form a film by gravure printing, screen printing, ink jet method, etc.
- a coating solution is prepared, and the coating solution is applied and dried on a desired layer (or electrode).
- the coating solution may contain a resin, and the resin can be dissolved or dispersed in a solvent, and the resin includes a non-conjugated polymer (for example, polyvinyl carbazol), conjugated polymer (for example, polyolefin polymer) can be used, for example, polyvinyl chloride, poly Boneto, polystyrene, polymethyl methacrylate Ichito, polybutyl methacrylate, polyester , Polysulfone, Polyphenylene oxide, Polybutadiene, Poly (N-vinylcarbazole), Hydrocarbon resin, Ketone resin, Phenoxy resin, Polyamide, Ethyl cell mouthpiece, Vinyl acetate, ABS resin, Polyurethane, Melamine resin, Unsaturated polyester Resin, alkyd resin, epoxy resin, silicone resin, etc.
- a non-conjugated polymer for example, polyvinyl carbazol
- conjugated polymer for example, polyolefin polymer
- polyvinyl chloride poly
- the coating solution may contain an antioxidant, a viscosity modifier, etc. depending on the purpose.
- a stable one that dissolves or disperses the components of the thin film can be appropriately selected from known solvents.
- solvents examples include alcohols (methanol, ethanol, isopropyl alcohol, etc.), ketones (acetone, methyl ethyl ketone, etc.), organic chlorines (black mouth form, 1,2-dichloroethane, etc.), aromatic Group hydrocarbons (benzene, toluene, xylene, etc.), aliphatic hydrocarbons (normal hexane, cyclohexane, etc.), amides (dimethylformamide, etc.), sulfoxides (dimethyl sulfoxide, etc.), Etc.
- the solvent may be a single component or a mixture of a plurality of components.
- a solvent having a high boiling point anisol, bicyclohexylbenzene, etc.
- anisol bicyclohexylbenzene, etc.
- a solvent that dissolves the electron-accepting organic compound is not used in a step other than the step of forming the layer containing the electron-accepting organic compound. It is preferable in that it does not attack the layer.
- the organic light emitting device manufactured by the manufacturing method of the present invention uses water substantially as a solvent. Compared with a device without a layer containing an electron-accepting organic compound, the light emission luminance and the light emission efficiency are excellent. In addition, the organic light emitting device has excellent life characteristics.
- the use of the organic light emitting device produced by the production method of the present invention is not particularly limited, but can be used for an illumination light source, a sign light source, a backlight light source, a display device, a printer head, and the like.
- As the display device a known drive technology, drive circuit, or the like can be used to select a configuration such as a sedanment type or a dot matrix type.
- An electron accepting organic compound solution 1 was prepared by dissolving F4-TCNQ, which is an electron accepting organic compound, in a acetonitrile solution at a weight concentration of 1%.
- the electron-accepting organic compound solution 1 was applied and formed at a rotational speed of 2000 rpm on a glass substrate on which an IT0 anode was formed by spin coating to form an electron-accepting organic compound film.
- the film-formed glass substrate is 180 ° C in the atmosphere 1
- the electron-accepting organic compound film was melted by heating for 0 minute.
- the centerline average roughness (Ra) of the IT0 anode surface measured by the method described in JIS-B0671-1 was lnm.
- a hole transporting polymer material exemplified as P1 in TO2005 / 52027 was prepared and dissolved in a xylene solvent at a weight concentration of 0.5% to obtain a hole transporting polymer material solution 1.
- the hole transporting polymer material solution 1 was formed on the electron-accepting organic compound film-formed glass substrate by a spin coating method so as to have a film thickness of 20 nm, thereby forming a hole transporting layer.
- the film-formed glass substrate was heat treated with 20 (TC for 15 minutes to insolubilize the hole transport layer.
- polymer light-emitting material 1 was prepared and dissolved in a xylene solvent at a weight concentration of 1.4. Molecular light emitting material solution 1 was obtained. Polymer light-emitting material solution 1 was formed on the glass substrate on which the hole transport layer had been formed so as to have a film thickness of 70 nm by a spin coating method to form a light-emitting layer. Here, BP361 manufactured by Samesion Co., Ltd. was used as the polymer light emitting material 1. Next, the glass substrate on which the light emitting layer had been formed was heat-treated at 130 ° C. for 45 minutes to evaporate the solvent.
- An electron-accepting organic compound solution 1 was prepared by dissolving TCNQ, which is an electron-accepting organic compound, in a acetonitrile solvent at a weight concentration of 1%.
- the electron-accepting organic compound solution 1 was applied onto a glass substrate on which an IT0 anode was formed at a rotational speed of 2000 mm by spin coating to form an electron-accepting organic compound film.
- the formed glass substrate was heated in the atmosphere at 180 ° C for 10 minutes to melt the electron-accepting organic compound film.
- Example 3 a hole transport layer and a light emitting layer were sequentially formed in the same manner as in Example 1, and after forming a cathode in the same manner as in Example 1, the organic light emitting device 2 was formed.
- Example 3
- the electron-accepting organic compound DDQ was dissolved in acetonitrile solvent at a weight concentration of 1 to obtain an electron-accepting organic compound solution 1.
- the electron-accepting organic compound solution 1 was applied and formed on a glass substrate on which an ITO anode was formed at a rotational speed of 2000 rpm by a spin coating method to form an electron-accepting organic compound film.
- the deposited glass substrate was heated in the atmosphere for 180 10 minutes to melt the electron-accepting organic compound film.
- An organic light emitting device was produced by the same manufacturing method as in Example 1 except that no electron-accepting organic compound film was formed. Prepare a constant voltage / current power supply, and make the organic light-emitting device by applying voltage by connecting the IT0 anode of 1 to 4 to the anode of the power supply and the aluminum cathode to the cathode of the power supply. Was made to emit light.
- Table 1 shows the luminance of each element and the maximum luminous efficiency of each element when the driving voltage is 6V. table
- the organic light-emitting devices 1 to 3 of the present invention having an electron-accepting organic compound film have significantly higher luminance and luminous efficiency than Comparative Example 1 having no electron-accepting organic compound film.
- the light emission luminance and the light emission efficiency of the organic light emitting device 5 measured in the same manner as in the organic light emitting devices 1 to 4 were 1210 [CdAi2] and 6.8 [Cd / A], respectively.
- the production method of the present invention it is possible to produce an organic light emitting device having excellent light emission luminance and light emission efficiency without substantially using water as a solvent.
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- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US12/667,955 US20100187518A1 (en) | 2007-07-12 | 2008-07-09 | Method of producing organic light emitting device |
EP08778193.6A EP2178347A4 (en) | 2007-07-12 | 2008-07-09 | METHOD FOR PRODUCING AN ORGANIC LIGHTING COMPONENT |
CN2008800237503A CN101690399B (zh) | 2007-07-12 | 2008-07-09 | 有机发光元件的制造方法 |
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JP2007182982A JP2009021104A (ja) | 2007-07-12 | 2007-07-12 | 有機発光素子の製造方法 |
JP2007-182982 | 2007-07-12 |
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WO2009008543A1 true WO2009008543A1 (ja) | 2009-01-15 |
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PCT/JP2008/062776 WO2009008543A1 (ja) | 2007-07-12 | 2008-07-09 | 有機発光素子の製造方法 |
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US (1) | US20100187518A1 (ja) |
EP (1) | EP2178347A4 (ja) |
JP (1) | JP2009021104A (ja) |
KR (1) | KR20100058466A (ja) |
CN (1) | CN101690399B (ja) |
TW (1) | TW200915913A (ja) |
WO (1) | WO2009008543A1 (ja) |
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WO2011158799A1 (ja) * | 2010-06-17 | 2011-12-22 | 住友化学株式会社 | 発光装置の製造方法 |
EP2549837A4 (en) * | 2010-03-15 | 2016-05-04 | Udc Ireland Ltd | PROCESS FOR PREPARING AN ORGANIC ELECTROLUMINESCENT ELEMENT |
JP2016115885A (ja) * | 2014-12-17 | 2016-06-23 | 株式会社デンソー | 有機el素子およびその製造方法 |
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TW201202389A (en) * | 2010-04-20 | 2012-01-16 | Sumitomo Chemical Co | Organic light emitting element |
US9083000B2 (en) * | 2011-04-29 | 2015-07-14 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting element, light-emitting device, and lighting device |
US9966539B2 (en) * | 2012-08-31 | 2018-05-08 | Idemitsu Kosan Co., Ltd. | Organic electroluminescence device |
EP3382770B1 (en) | 2017-03-30 | 2023-09-20 | Novaled GmbH | Ink composition for forming an organic layer of a semiconductor |
US11903232B2 (en) | 2019-03-07 | 2024-02-13 | Semiconductor Energy Laboratory Co., Ltd. | Light-emitting device comprising charge-generation layer between light-emitting units |
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US20100187518A1 (en) | 2010-07-29 |
EP2178347A1 (en) | 2010-04-21 |
EP2178347A4 (en) | 2014-08-27 |
JP2009021104A (ja) | 2009-01-29 |
CN101690399B (zh) | 2012-12-05 |
TW200915913A (en) | 2009-04-01 |
CN101690399A (zh) | 2010-03-31 |
KR20100058466A (ko) | 2010-06-03 |
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