WO2006123696A1 - 有機エレクトロルミネッセンス用高分子組成物 - Google Patents
有機エレクトロルミネッセンス用高分子組成物 Download PDFInfo
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- H—ELECTRICITY
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- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/14—Macromolecular compounds
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
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- C09K2211/1441—Heterocyclic
- C09K2211/1491—Heterocyclic containing other combinations of heteroatoms
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- 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
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/10—Organic polymers or oligomers
- H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
- H10K85/115—Polyfluorene; Derivatives thereof
Definitions
- the present invention relates to a polymer composition for organic electoluminescence.
- organic EL device is a general term for devices using organic compounds as a light emitting material or a charge transport material for a light emitting layer.
- the wet coating method of a polymer material solution is superior in productivity to the method of depositing low molecules.
- a low molecular weight compound having a light emitting property and a charge transporting property is mixed with a polymer compound having a crosslinking group, or a high molecular compound having a light emitting property and a charge transporting property.
- a high molecular compound having a crosslinking group or a low molecular compound having a crosslinking group typified by aromatic bisazide is mixed as a crosslinking agent.
- the crosslinking agent having a crosslinking group has an aromatic ring, the light emitting property and charge transporting property inherent to the light emitting material and charge transporting material may adversely affect.
- Patent Document 6 is an organic EL device including a first organic layer and a second organic layer, in which the first organic layer has a polymer having a carrier transporting property or a light emitting property and a functional group.
- An organic EL device comprising: a low molecular cross-linking agent, and the low molecular cross-linking agent cross-linked in the first organic layer is disclosed.
- low-molecular crosslinking agents having 2 to 4 functional groups are used, and there are problems in the curability of the organic layer and the ease of creating a layer structure.
- Patent Document 1 US6107452
- Patent Document 2 US2002 / 106529 (JP 2002-170667)
- Patent Document 3 WO96 / 20253 (Tokuheihei 10-511718)
- Patent Document 4 ⁇ ⁇ 02002/10129 (Special Table 2004-505169)
- Patent Document 5 WO2004 / 100282
- Patent Document 6 US2005 / 0186106A1
- An object of the present invention is to provide a polymer composition for organic EL, which can easily form a layer structure and can provide an organic EL element excellent in element performance such as efficiency. Means for solving the problem
- the present invention relates to a polymer composition for organic electoluminescence, comprising a polymer material as a charge transport material or a light emitter and a crosslinking agent, wherein the crosslinking agent does not contain an aromatic ring.
- a polymer composition for organic electoluminescence comprising a polymer material as a charge transport material or a light emitter and a crosslinking agent, wherein the crosslinking agent does not contain an aromatic ring.
- this invention relates to the organic electoluminescence device produced using the said polymer composition.
- the polymer composition of the present invention can easily form a layer structure and can provide an organic EL device having excellent device performance.
- organic EL devices made using them are preferable for devices such as liquid crystal display knock lights or curved or flat light sources for illumination, segment type display devices, dot matrix flat panel displays, etc. In use wear.
- the polymer composition of the present invention includes a polymer material as a charge transport material or a light emitter (hereinafter also referred to as a polymer charge transport material or a polymer light emitter, respectively), and further has no aromatic ring. ! Includes a cross-linking agent.
- the crosslinking agent refers to a monomer compound having a substituent capable of being polymerized by the action of heat, light, and a thermal polymerization initiator or a photopolymerization initiator.
- a polymerizable substituent refers to a substituent capable of forming a compound by forming a bond between two or more molecules by causing a polymerization reaction. Since the crosslinking agent used in the present invention does not have an aromatic ring, the crosslinking group does not have an aromatic ring.
- cross-linking groups examples include vinyl groups, acetylene groups, butyr groups, acrylic groups, acrylate groups, acrylamide groups, methacryl groups, methacrylate groups, methacrylamide groups, butyl ether groups, vinylamino groups, silanol groups, small groups.
- a group having a member ring for example, a cyclopropyl group, a cyclobutyl group, an epoxy group, an oxetane group, a diketene group, an episulfide group, etc.
- a rataton group for example, a cyclopropyl group, a cyclobutyl group, an epoxy group, an oxetane group, a diketene group, an episulfide group, etc.
- a rataton group for example, a cyclopropyl group, a cyclobutyl group, an epoxy group, an oxetane group, a
- combinations of groups capable of forming an ester bond or an amide bond can also be used.
- an ester group and an amino group or an ester group and a hydroxyl group.
- cross-linking agent among them, a polyfunctional monomer having two or more functions (having two or more cross-linking groups), preferably five or more functions (having five or more cross-linking groups) has excellent curability and is preferably used. It is done.
- a monomer having a (meth) acrylate group as a crosslinking group that is, (meth) acrylate.
- (Meth) acrylate is a general term for acrylate and meta acrylate). More preferably, it is a (meth) acrylate of an aliphatic alcohol.
- Specific examples of the monofunctional monomer having a (meth) acrylate group include 2-ethylhexyl carbitol acrylate and 2-hydroxyethyl acrylate.
- 1,6-hexanediol examples include rudi (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, 3-methylpentanediol di (meth) acrylate.
- polyfunctional monomers having a (meth) acrylate group include trifunctional (meth) acrylates such as trimethylolpropane tri (meth) acrylate and pentaerythritol tri (meth) acrylate; Tetrafunctional (meth) acrylate, such as tall tetra (meth) acrylate, pentafunctional (meth) acrylate, such as dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, Examples thereof include (meth) atalylate having 6 or more functionalities such as trispentaerythritol otata (meth) atalylate.
- trifunctional (meth) acrylates such as trimethylolpropane tri (meth) acrylate and pentaerythritol tri (meth) acrylate
- Tetrafunctional (meth) acrylate such as tall tetra (meth)
- a bifunctional or higher functional group preferably a pentafunctional or higher functional (meth) acrylate, more preferably dipentaerythritol penta or hexa acrylate, or tripentaerythritol octatalate, more preferably dipentaerythritol.
- Xatalylate or tripentaerythritol octatalate is excellent in curability and is preferably used.
- the crosslinking agent is described, for example, on pages 17 to 56 of Photopolymer Handbook (Industry Research Committee, 1989).
- the crosslinking agent is usually usually 1 to 99 parts by weight, preferably 1 to 60 parts by weight, more preferably 5 to 50 parts by weight with respect to 100 parts by weight of the total amount of the polymer charge transport material or polymer light emitter. It is contained in the range of. When the content of the crosslinking agent is in the range of 1 to 60 parts by mass based on the above criteria, the smoothness of the coating film tends to be favorable, which is preferable.
- crosslinking agents can be used alone or in combination of two or more.
- the polymer composition of the present invention may contain a photopolymerization initiator.
- the photopolymerization initiator include an active radical generator that generates an active radical when irradiated with light, and an acid generator that generates an acid.
- active radical generators include acetophenone photopolymerization initiators, benzoin photopolymerization initiators, benzophenone photopolymerization initiators, thixanthone photopolymerization initiators, and triazine photopolymerization initiators.
- the polymer charge transport material or the polymer light emitter itself generates radicals by light and functions as a photopolymerization initiator. In such a case, without adding a photoinitiator May be.
- acetophenone-based photopolymerization initiator examples include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropane 1-one, benzyldimethyl ketal, 2-hydroxy-1-2-methyl 1- [4- (2 Hydroxyethoxy) phenol] propane 1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl 2-morpholino 1 1- (4-methylthiophenyl) propane 1-on, 2 benzil 2 dimethylamino- 1- ( 4-morpholinophenol) butane monoone, 2-hydroxy-2-methyl 1- [4 mono (1-methylvinyl) phenol] propanone oligomers.
- benzoin-based photopolymerization initiator examples include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.
- benzophenone-based photopolymerization initiators include benzophenone, o benzoyl methyl benzoate, 4-phenol penzophenone, 4-benzoyl 4'-methyldiphenylsulfide, 3, 3 ', 4, 4'-tetra (tert-butyl peroxycarbo- E) Benzophenone, 2, 4, 6 Trimethylbenzophenone and the like.
- Examples of the thixanthone photopolymerization initiator include 2 isopropyl thixanthone, 4 isopropyl thixanthone, 2,4 jetyl thioxanthone, 2,4 dichloro thixanthone, 1 chloro-4 propoxy thixanthone, and the like.
- Triazine photopolymerization initiators include, for example, 2, 4 bis (trichloromethyl) 6- (4-methoxyphenyl) 1, 3, 5 triazine, 2, 4 bis (trichloromethyl) 6- (4 —Metoxynaphthyl) 1, 3, 5 Triazine, 2, 4 Bis (trichloromethyl) 6 Pipeol —1, 3, 5 Triazine, 2, 4 Bis (trichloromethyl) —6— (4-Methoxystyryl) — 1, 3, 5 Triazine, 2, 4 Bis (trichloromethyl) 6— [2— (5-Methylfuran-2-yl) etul] 1, 1, 3, 5 Triazine, 2, 4 Bis (trichloromethyl) 6— [2— (Furan-2-yl) ethyl] 1, 3, 5 Triazine, 2, 4 Bis (trichloromethyl) 6— [2— (4 Jetylamino 2-methylphenyl) tulle] — 1 , 3, 5
- an active radical generator for example, 2, 4, 6 trimethylbenzoyl diphenylphosphine Inoxide, 2, 2, 1 bis (o black mouth phenol) 4, 4 ,, 5, 5, -tetraphenyl 1, 2, -biimidazole, 10-butyl-2-chloroataridon, 2-ethylanthraquinone, benzyl 9, 10 Phenanthrene quinone, camphor quinone, methyl methyl glyoxylate, titanocene compound and the like can also be used.
- Commercially available products can be used as the active radical generator.
- Examples of commercially available photopolymerization initiators include the trade name “Irgacure 907” (acetophenone photopolymerization initiator, manufactured by CIBA—GEIGY).
- Examples of the acid generator include 4-hydroxyphenol dimethylsulfo p-toluenesulfonate, 4-hydroxyphenyldimethylsulfohexafluoroantimonate, 4-acetoxyphenyl dimethylsulfo- N-toluenesulfonate, 4-acetoxiphenol 'methyl' benzylsulfo-hexafluoroantimonate, triphene ninores nolefomu p tonorenosenorefonate, trifénolesnorenohexa hexanoleo
- Examples include onium salts such as antimonate, diphenyldodium p-toluenesulfonate and diphenylhexoxafluroantimonate, nitrobenzyl disilates, and benzoin tosylate.
- active radical generators there are compounds that generate an acid simultaneously with active radicals.
- a triazine photopolymerization initiator is also used as an acid generator. .
- photopolymerization initiators may be used alone or in combination of two or more.
- the polymer composition of the present invention may contain a photopolymerization initiation assistant.
- the photopolymerization initiator is a compound used in combination with the photopolymerization initiator to promote the polymerization of the crosslinking agent initiated by the photopolymerization initiator.
- Examples of photopolymerization initiation assistants include amine photopolymerization initiation assistants and alkoxyanthracene photopolymerization initiation assistants.
- Examples of the amine photopolymerization initiation assistant include triethanolamine, methyl jetanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-Dimethylaminoethyl benzoate, 4-dimethylaminobenzoylhexylhexyl, N, N-dimethylbalato Ruidin, 4,4,1bis (dimethylamino) benzophenone (commonly known as Michler's ketone), 4,4, bis (jetylamino) benzophenone, 4,4,1bis (ethylmethylamino) benzophenone and the like.
- alkoxyanthracene photopolymerization initiation assistant examples include 9,10 dimethoxyanthracene, 2 ethyl-9,10 dimethoxyanthracene, 9,10 ethoxyanthracene, 2 ethyl 9,10 ethoxyanthracene, and the like.
- Commercially available photopolymerization initiation assistants can also be used.
- Examples of commercially available photopolymerization initiation assistants include the trade name “EAB-F” (manufactured by Hodogaya Chemical Co., Ltd.). It is done.
- a strong photopolymerization initiator When a strong photopolymerization initiator is used, its content is usually 10 mol or less, preferably 0.01 mol or more and 5 mol or less per mol of the photopolymerization initiator.
- the total amount of the photopolymerization initiator and the photopolymerization initiation assistant is usually 3 parts by mass or more and 30 parts by mass or less, preferably 5 parts by mass or more and 25 parts by mass or less with respect to 100 parts by mass of the total amount of the crosslinking agent.
- the polymer composition of the present invention may further contain a chain transfer agent.
- chain transfer agents include 2,4-diphenyl 4-methyl 1-pentene, n-dodecyl mercaptan, t-dodecyl mercaptan, n-octyl mercaptan, and limonene.
- the content of the strong chain transfer agent is usually 0.5% or more and 5% or less in terms of weight fraction with respect to the total solid content of the composition of the present invention.
- the polymer composition of the present invention may contain a thermal polymerization initiator.
- a thermal polymerization initiator those generally known as radical polymerization initiators can be used.
- radical polymerization initiators can be used.
- benzoylperoxide lauroylperoxide, t-butylperoxypivalate 1, 1, 1, 1 bis (t butylperoxy) cyclohexane and other organic peroxides
- hydrogen peroxide When using a peroxide as a radical polymerization initiator, use a peroxide as a redox initiator with a reducing agent.
- the polymer light-emitting material used in the present invention has a polystyrene-equivalent number average molecular weight of usually 10 3 to 10 8 .
- conjugated polymer compounds are preferred.
- the role polymer compound means a polymer compound in which a delocalized ⁇ electron pair exists along the main chain skeleton of the polymer compound. As this delocalized electron, an unpaired electron or a lone electron pair may participate in resonance instead of a double bond.
- the polymer light emitter used in the present invention may be a homopolymer or a copolymer.
- polyfluorene for example, Japanese Journal of Applied Physics (Jpn. J Appl. Phys.), 30th page, L1941 (1991)
- polyparaphenylene see, for example, Advanced 'Materials (Adv. Mater.) Vol.
- polypyrrole Polyarylene polymers such as polypyridine, polyarine and polythiophene; polyarylene vinylene polymers such as polyparaphenylene-bilene and polychelene-ylene (see, for example, the published specification of W098Z27136); polyphenylene sulfide ; Polypower rubazole and the like can be mentioned [For example, “Advanced Materials Vol.12 1737 -1750 (2000)” and “Organic EL Display Technology Monthly Display December issue P68 ⁇ 73 ”].
- polyarylene polymer light emitters are preferred.
- Examples of the repeating unit contained in the polyarylene polymer light emitter include an arylene group and a divalent heterocyclic group, and those containing 20 to LOO mol% of these repeating units are preferred, and 50 to 99 mol 0 / Those containing 0 are more preferred.
- the number of carbon atoms constituting the ring of the divalent heterocyclic group is usually about 3 to 60, and specific examples thereof include pyridine monozyl group, diazaphenylene group, quinoline diyl group, quinoxaline diyl group, and atalidine diyl.
- Group, bibilidyl group, phenantyl ring group, the following formula (1), A —0—, —S—, —Se—, —NR,, one, —C (R,) (R,) one, or — Si (R,) (R ′) —.
- the polyarylene polymer light-emitting material includes a repeating unit represented by the following formula (1).
- R la , R lb , R le , R 2a , R 2b and R 2c are each independently a hydrogen atom, a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an arylalkyl group, an arylalkyl group, Arylalkyloxy group, arylalkylthio group, alkyl group, alkyl group, arylalkyl group, arylalkyl group, acyl group, acyloxy group, amide group, acid imide group, imine residue, Substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, cyano group,
- A represents an atom or a group of atoms together with four carbon atoms on the two benzene rings in the formula (1) to complete a 5-membered ring or a 6-membered ring. As shown below, it is not limited to these.
- each RR ⁇ R is independently a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an arylalkyl group, an aryl alkyl group, an arylalkyloxy group, an arylalkylthio group, an alkenyl group.
- alkyl group, aryl alkenyl group, aryl alkyl group, acyloxy group, substituted amino group Represents a mono group, a substituted silyloxy group, a substituted silylthio group, a substituted silylamino group, a cyano group or a monovalent heterocyclic group.
- R ′ each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an aryloxy group, an arylalkyl group, an arylalkyloxy group, an arylalkylthio group, an alkyl group, Group, alkyl group, arylalkyl group, arylalkyl group, acyl group, acyloxy group, amide group, acid imide group, imine residue, substituted amino group, substituted silyl group, substituted silyloxy group, substituted Represents a silylthio group, a substituted silylamino group, a cyano group, a nitro group or a monovalent heterocyclic group.
- R ′ ′ each independently represents a hydrogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an aryloxy group, an arylalkyl group, an arylalkyloxy group, an arylalkylthio group, an alkyl group, An alkynyl group, an arylalkyl group, an arylalkyl group, an acyl group, a substituted silyl group, a substituted silyloxy group, a substituted silylthio group, a substituted silylamino group, or a monovalent heterocyclic group is represented.
- R, R ⁇ R "halogen atom, alkyl group, alkyloxy group, alkylthio group, aryl group, aryloxy group, aryl group, aryl group, alkyl group, aryl group, alkyl group, alkyl group, alkyl group Group, arylalkyl group, arylalkyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, substituted amino group, amide group, acid imide group, acyl group, acyloxy group, and monovalent heterocyclic group Definitions and specific examples are the same as those described above for R lb , R le , R 2a , R 2b and R.
- 1 O, 1 S, 1 Se, 1 NR,, 1, 1 CR'R, 1 or 1 SiR, R, 1 is preferred O, 1 S-, 1 CR'R, 1 More preferred.
- Amide group acid imide group, imine residue, substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, cyano group, nitro group, monovalent heterocyclic group,
- the lower aryloxy group, heteroarylthio group, alkyloxycarbonyl group, aryloxycarbonyl group, arylalkyloxycarbonyl group, and heteroaryloxycarbonyl group are the same as described above.
- Examples of the repeating unit represented by the above formula (1) include the following structures.
- a hydrogen atom on the benzene ring is 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.
- the polymer light-emitting material used in the present invention may contain, in addition to the arylene group and divalent heterocyclic group, for example, a repeating unit derived from an aromatic amine. In this case, hole injection property and transport property can be imparted to the polymer light emitter.
- the molar ratio of the repeating unit derived from the arylene group, the repeating unit having a divalent heterocyclic group power and the aromatic amine is usually in the range of 99: 1 to 20:80.
- the repeating unit derived from the aromatic amine force is preferably a repeating unit represented by the following formula (2).
- Ar 4 , Ar 5 , Ar 6 and Ar 7 each independently represent an arylene group or a divalent heterocyclic group.
- Ar 9 and Ar 1Q each independently represent an aryl group or a monovalent heterocyclic group.
- o and p each independently represent 0 or 1, and 0 ⁇ o + p ⁇ 2.
- arylene group and divalent heterocyclic group are the same as those described above.
- aryl groups and monovalent heterocyclic groups are the same as those described for R la , R lb , R lc , R 2a , R 2b and R 1 above.
- Specific examples of the repeating unit represented by the formula (2) include the following structures.
- a hydrogen atom on the aromatic ring is a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an arylalkyl group, an arylalkyl group, an arylalkyloxy group, an arylalkylthio group.
- repeating unit represented by the above formula (2) the repeating unit represented by the following formula (3) is particularly preferable.
- each of R 7 , R ° and R 9 independently represents a halogen atom, an alkyl group, an alkyloxy group, an alkylthio group, an aryl group, an aryloxy group, an aryloxy group, an arylalkyl group, an arylalkyl group.
- X and y each independently represent an integer from 0 to 4.
- z represents an integer of 0-2.
- w represents an integer of 0 to 5.
- the polymer light emitter used in the present invention may be a random, block or graft copolymer, or a polymer having an intermediate structure thereof, for example, a random copolymer having a block property. It may be a unity. Is it a viewpoint of obtaining a polymer light emitter with high quantum yield of light emission? Et al. Are preferably block copolymers or block copolymers or graft copolymers, rather than complete random copolymers. If the main chain is branched and there are 3 or more terminal ends, dendrimers are also included.
- the terminal group of the polymer light-emitting material used in the present invention is stable since the polymerization active group remains as it is! Protected by the base!
- a structure having a conjugated bond continuous with the conjugated structure of the main chain is preferred, for example, a structure in which it is bonded to an aryl group or a heterocyclic group via a carbon-carbon bond.
- substituents described in Chemical formula 10 of JP-A-9-45478 are exemplified.
- the polymer light emitter used in the present invention preferably has a number average molecular weight of about 10 3 to 10 8 in terms of polystyrene, and a number average molecular weight of about 10 4 to 10 6 in terms of polystyrene. Is more preferable.
- a polymer light-emitting material that emits light in a solid state is preferably used.
- Examples of the method for synthesizing the polymer light emitter used in the present invention include, for example, a method of polymerizing a corresponding monomer by a Suzuki coupling reaction, a method of polymerizing by a Grignard reaction, a method of polymerizing by a Ni (0) catalyst, Polymerization with an oxidizing agent such as FeCl, electrochemically acid
- a method of chemical polymerization or a method of decomposing an intermediate polymer having an appropriate leaving group is exemplified.
- the method of polymerizing by Suzuki coupling reaction, the method of polymerizing by Grindard reaction, and the method of polymerizing by Ni (O) catalyst are preferable because the reaction control is easy.
- the monomer before polymerization must be purified after being purified by methods such as distillation, sublimation purification, and recrystallization. It is also preferable to carry out purification treatment after synthesis, such as reprecipitation purification and fractionation by chromatography.
- Examples of the solvent include black mouth form, methylene chloride, dichloroethane, tetrahydrofuran, toluene, xylene, mesitylene, tetralin, decalin, n-butylbenzene and the like. Depending on the structure and molecular weight of the polymer light emitter, these solvents are usually used in the polymer light emitter. 0.1% by weight or more can be dissolved.
- the amount of the solvent is usually about 1000 to 100,000 parts by weight with respect to 100 parts by weight of the polymer light emitter.
- the polymer composition of the present invention may contain a low molecular weight or oligomer, a dendrimer luminescent dye, a charge transport material, and the like, if necessary, in addition to the polymer light emitter.
- Examples of the polymer charge transport material used in the present invention include a polymer hole transport material and a polymer electron transport material.
- polymer hole transport materials include polyvinyl carbazole or derivatives thereof, polysilane or derivatives thereof, polysiloxane derivatives having aromatic amines in the side chain or main chain, pyrazoline derivatives, arylamine derivatives, stilbene derivatives, triphenyldiamines.
- Derivatives polyarine or derivatives thereof, polythiophene or derivatives thereof, polypyrrole or derivatives thereof, poly (p-phenolene-lene) or derivatives thereof, or poly (2,5-cha-lenbiylene) or derivatives thereof, etc. Is exemplified
- JP-A-63-70257, JP-A-63-17586, JP-A-2-135359, JP-A-2-135361, JP-A-2- Examples include those described in No. 209988, No. 3-37992 and No. 3-152184.
- Polybour strength rubazole or a derivative thereof can be obtained, for example, by cation polymerization or radical polymerization of bulur monomer strength.
- polysilane or derivatives thereof include compounds described in Chemical 'Review (Chem. Rev.) No. 89, page 1359 (1989), GB 2300196 published specification, and the like.
- the methods described in these can be used, but the Kipping method is particularly preferably used.
- the polysiloxane or derivative thereof has almost a hole transporting property in the siloxane skeleton structure
- those having the structure of the low molecular hole transporting material in the side chain or main chain are preferably used.
- those having a hole transporting aromatic amine in the side chain or main chain Indicated.
- a polymer compound composed of a repeating unit derived from an aromatic amine is particularly preferred.
- the repeating unit from which the aromatic amine is also derived those represented by the above formula (3) are more preferred, and those represented by the above formula (2) are more preferred.
- polymer charge transport materials known polymer electron transport materials can be used, and examples thereof include polyquinoline or a derivative thereof, polyquinoxaline or a derivative thereof, polyfluorene or a derivative thereof.
- the purity of the polymer material affects the device performance such as luminescence properties. Therefore, the monomer before polymerization is distilled, sublimated and purified, recrystallized, column chromatography. It is preferable to polymerize after purification by the method. In addition, after polymerization, acid washing, alkali washing, neutralization, water washing, organic solvent washing, reprecipitation, centrifugation, extraction, column chromatography, dialysis and other conventional separation operations, purification operations, drying operations, and other operations I prefer to handle it.
- the polymer composition of the present invention contains a polymer charge transport material or polymer light emitter and a crosslinking agent.
- the composition of the present invention may further contain a solvent.
- additives such as a charge transport material, a light emitting material, a surfactant, and a stabilizer may be included.
- the ratio of the polymer charge transport material or polymer light emitter in the composition is 20 wt% to 100 wt%, preferably 40 wt% to 100 wt%, based on the total weight of the composition excluding the solvent.
- the proportion of the solvent in the composition is usually lwt% to 99.9wt%, preferably 60wt% to 99.5wt%, more preferably 80wt% to 99.Owt, based on the total weight of the composition.
- Film formation methods for the polymer composition of the present invention include spin coating, casting, micro gravure coating, gravure coating, bar coating, roll coating, wire bar coating, and dip coating.
- Application methods such as spray coating, screen printing, flexographic printing, offset printing, and inkjet printing can be used.
- Printing methods such as screen printing, flexographic printing, offset printing, and inkjet printing are preferred because pattern formation and multi-color coating are easy.
- the viscosity of the polymer composition of the present invention varies depending on the printing method. When the ink composition is passed through a discharge device as an ink thread, such as an ink jet printing method, clogging and flight bending at the time of discharge may occur. In order to prevent this, it is preferable that the range is 1 to 20 mPa's at 25 ° C.
- the solvent used in the polymer composition of the present invention is not particularly limited, but a solvent capable of dissolving or uniformly dispersing materials other than the solvent in the composition is preferable.
- the solvent is a chlorine-based solvent such as chloroform, methyl chloride or dichloroethane, an ether-based solvent such as tetrahydrofuran, or toluene.
- Xylene Tetraline
- Carsol n-Hexylbenzene, Cyclohexylbenzene, Monoclonal Benzene, o-Dichloroguchi benzene and other aromatic hydrocarbon solvents, Decalin, Bicyclohexyl and other aliphatic hydrocarbons
- ketone solvents such as acetone, methyl ethyl ketone, and 2-heptanone
- ester solvents such as ethyl acetate, butyl acetate, ethyl cellosolve acetate, and propylene glycol monomethyl ether acetate.
- the layer formed using the polymer composition of the present invention can suppress dissolution when the upper layer is wet-coated, for example, by hardening it by the action of heat or light. .
- the upper layer is wet-coated on the upper layer to be wet-coated, it is preferable to cure the polymer composition of the present invention using the upper layer as well.
- the wet coating is not performed on the upper layer to be wet coated, there is no fear of dissolution.
- the upper layer may be a composition containing no cross-linking agent.
- the optimum value of the film thickness of the charge transport layer or the light emitting layer varies depending on the material used, and the drive voltage and the light emission efficiency are appropriate values.
- it is 1 nm to 1 ⁇ m, preferably 2 nm to 5 OOnm, and more preferably 5 ⁇ ! ⁇ 200nm.
- the organic EL device produced using the polymer composition of the present invention has a charge transport layer or a light-emitting layer between electrodes composed of an anode and a cathode, and the charge transport layer or the light-emitting layer has It is formed using the composition of the present invention.
- an electron transport layer usually between the cathode and the light-emitting layer
- hole transport Layer usually between the anode and the light emitting layer
- the charge transport layer is a hole transport layer and there is only one charge transport layer between the anode and the light emitting layer, the layer is transported as a hole injection layer, a hole transport layer, or a hole injection 'transport. You can express it with any name! /.
- the layer in contact with the anode is referred to as a hole injection layer.
- the polymer composition of the present invention is characterized by excellent performance when used as a hole injection layer.
- the hole transport layer has a structure in contact with the positive electrode (when the hole transport layer is a hole injection layer). It is preferable because the device shows excellent performance!
- the substrate on which the organic EL element of the present invention is formed is not particularly limited as long as it forms an electrode and does not change when an organic layer is formed, such as glass, plastic, polymer film, and silicon substrate. Illustrated. In the case of an opaque substrate, the opposite electrode is preferably transparent or semi-transparent.
- the organic EL device produced using the polymer composition of the present invention usually, at least one of the anode and the electrode having a cathode force is transparent or translucent, and the anode side is transparent or translucent.
- the anode material a conductive metal oxide film, a translucent metal thin film, or the like is used. Specifically, indium oxide, zinc oxide, tin oxide, and their composite materials such as indium-tin-oxide (ITO), indium-zinc-oxide, etc. are used. Films such as NESA, gold, platinum, silver, and copper are used, and ITO, indium “zinc” oxide, and tin oxide are preferable.
- Examples of the production method include a vacuum deposition method, a sputtering method, an ion plating method, and a plating method.
- an organic transparent conductive film such as polyaline or a derivative thereof, polythiophene or a derivative thereof may be used as the anode.
- the film thickness of the anode can be appropriately selected in consideration of light transmittance and electrical conductivity.
- 1S for example, 10 nm to 10 ⁇ m, preferably 20 nm to l ⁇ m, Preferably, it is 50 nm to 500 nm.
- a phthalocyanine derivative In order to facilitate charge injection on the anode, a phthalocyanine derivative, a conductive polymer, a layer such as carbon, a metal oxide, a metal fluoride, an organic insulating material, or the like A layer having an average film thickness of 2 nm or less may be provided.
- a material having a low work function is preferable.
- metals such as lithium, sodium, potassium, rubidium, cesium, beryllium, magnesium, calcium, strontium, barium, aluminum, scandium, vanadium, zinc, yttrium, indium, cerium, samarium, europium, terbium, ytterbium, Or an alloy of two or more of them, or an alloy of one or more of them with one or more of gold, silver, platinum, copper, manganese, titanium, conoret, nickel, tungsten, tin, or Graphite or a graphite intercalation compound is used.
- the cathode may have a laminated structure of two or more layers.
- the film thickness of the cathode can be appropriately selected in consideration of electric conductivity and durability, but is, for example, 10 nm to 10 ⁇ m, preferably 20 nm to l ⁇ m, and more preferably. Is between 50 nm and 500 nm.
- a method for producing the cathode As a method for producing the cathode, a vacuum deposition method, a sputtering method, a laminating method in which a metal thin film is thermocompression-bonded, or the like is used.
- a cathode made of a conductive polymer, or a layer having an average film thickness of 2 nm or less such as a metal oxide, metal fluoride, or organic insulating material may be provided between the cathode and the organic material layer.
- a protective layer for protecting the organic EL element may be attached. In order to use the organic EL element stably for a long period of time, it is preferable to attach a protective layer and / or protective cover in order to protect the element from the outside.
- a polymer compound, metal oxide, metal fluoride, metal boride and the like can be used.
- a glass plate, a plastic plate having a low water permeability treatment on the surface, or the like can be used, and the cover is bonded to the element substrate with a thermal effect resin or a photocured resin and sealed.
- a thermal effect resin or a photocured resin and sealed are preferably used. If the space is maintained using a spacer, it is easy to prevent the element from being damaged. If an inert gas such as nitrogen or argon is sealed in the space, it is possible to prevent the oxidation of the cathode.
- a desiccant such as barium oxide in the space, it becomes easy to suppress the moisture adsorbed in the manufacturing process from damaging the device. Of these, it is preferable to take one or more measures.
- the organic EL element produced using the polymer composition of the present invention can be used as a planar light source, a segment display device, a dot matrix display device, a backlight of a liquid crystal display device, and the like.
- the planar anode and cathode may be arranged so as to overlap each other.
- a method in which a mask having a pattern-like window is provided on the surface of the planar light-emitting element, an organic material layer of a non-light-emitting portion is formed extremely thick and substantially non-light-emitting There are a method of emitting light and a method of forming either or both of the anode and the cathode in a pattern.
- both the anode and the cathode may be formed in a stripe shape and arranged so as to be orthogonal to each other. Partial color display and multicolor display are possible by separately applying a plurality of types of polymer light emitters having different emission colors or by using a color filter or a light emission conversion filter.
- the dot matrix element can be driven in a nosic manner, or may be driven in combination with a TFT or the like.
- the number average molecular weight in terms of polystyrene was determined by SEC.
- polymer compound 1 The organic layer was divided into two parts, each was added dropwise to 600 mL of methanol, stirred for 1 hour, the deposited precipitate was filtered and dried under reduced pressure for 2 hours.
- the yield of the obtained polymer (hereinafter referred to as polymer compound 1) was 3.26 g.
- n-octylmagnesium bromide (l.OmolZlTHF solution) was added dropwise over 30 minutes. After completion of the dropwise addition, the temperature was raised to 0 ° C., stirred for 1 hour, then warmed to room temperature and stirred for 45 minutes. The reaction was completed by adding 20 ml of 1N hydrochloric acid in an ice bath, and the organic layer was extracted with ethyl acetate and dried over sodium sulfate.
- N-octyl bromide was added dropwise, and after completion of the addition, the mixture was reacted at 50 ° C for 9 hours. After completion of the reaction, the organic layer was extracted with toluene, washed twice with water, and dried over sodium sulfate. Purification by a silica gel column using hexane as a developing solvent gave 5.13 g (yield 74%) of Compound D as a yellow oil.
- this reaction solution was cooled, and then a mixed solution of 25% aqueous ammonia 200 mlZ methanol 900 mlZ ion-exchanged water 900 ml was poured into the solution and stirred for about 1 hour. Next, the produced precipitate was filtered and collected. This precipitate was dried under reduced pressure and then dissolved in toluene. The toluene solution was filtered to remove insoluble matters, and the toluene solution was purified by passing through a column filled with alumina. Next, this toluene solution was washed with a 1N aqueous hydrochloric acid solution, allowed to stand and separated, and then the toluene solution was recovered.
- this toluene solution was washed with about 3% ammonia water, allowed to stand and liquid-separated, and then a toluene solution was recovered.
- this toluene solution was washed with ion exchange water, allowed to stand and separated, and then the toluene solution was recovered.
- this toluene solution was poured into methanol and re-precipitated.
- the produced precipitate was collected and washed with methanol, and then this precipitate was dried under reduced pressure to obtain a polymer 6. Og.
- This polymer is referred to as polymer compound 2.
- the resulting polystyrene reduced weight-average molecular weight of the polymer compound 2, 8. a 2Xl0 5, the number-average molecular weight was 1. 0x1 0 5.
- bromobenzene (0.28 g, 1.78 mmol) was dissolved in 1 mL of toluene, added to the reaction solution, and stirred at 110 ° C. for 2 hours.
- chloro-boronic acid (0.22 g, 1.49 mmol) was added to the reaction solution and stirred at 110 ° C. for 2 hours.
- the organic layer was added dropwise to 200 mL of a methanol Z water (1Z1) mixture and stirred for 1 hour. Filter the precipitate and use methanol and ion-exchanged water Washed and dried under reduced pressure.
- N, N, —bis (4-bromophenol) — N, N, —bis (4-n-butylphenol) 1, 4-phenyldiamine (1,911 g), N, N, bibis (4-bromophenol) phenolamine (0.848 g) and 2,2, bibilidyl (1.687 g) were added together and dissolved in 109 mL of dehydrated tetrahydrofuran that was bubbled with argon. After the temperature of this solution was raised to 60 ° C, bis (1,5-cyclooctagen) nickel (0) ⁇ Ni (COD) ⁇ (2.971 g) was added and stirred.
- reaction solution was cooled to room temperature, dropped into 25% aqueous ammonia 14 mLZ methanol 109 mLZ ion-exchanged water 109 mL mixed solution and stirred for 1 hour, and then the deposited precipitate was filtered, dried under reduced pressure, and dissolved in 120 mL of toluene. It was. After dissolution, 0.48 g of radiolite was added and stirred for 30 minutes, and the insoluble material was filtered off. The obtained filtrate was purified through an alumina power ram. Next, 236 mL of 4% aqueous ammonia was added and stirred for 2 hours, and then the aqueous layer was removed.
- polymer compound 4 The yield of the obtained polymer (hereinafter referred to as polymer compound 4) was 1.54 g.
- Aliquat 336 1.72g, Compound F 6.2171g, Compound G 0.55085g, Compound H 6.2225g, Compound I 0.5487g in a 500ml 4-neck flask did. Add 100 ml of toluene, and then add 7.6 mg of dichlorobis (triphenylphosphine) palladium (II) and 24 ml of aqueous sodium carbonate solution. After stirring for 3 hours under reflux, add 0.40 g of phenylboric acid. Stir overnight. Sodium / N-jetyldithiocarbamate aqueous solution was added, and the mixture was further stirred for 3 hours under reflux.
- Example 1 9 and Comparative Example 1 4 As shown in Table 1, the polymer compound was mixed with lwt% in toluene, and the additives were mixed and dissolved in the types and addition amounts shown in Table 1. Thereafter, the solution was filtered through a 0.2 micron Teflon (registered trademark) filter to prepare a coating solution.
- Teflon registered trademark
- the obtained solution was formed on a glass substrate by spin coating.
- the one without photoinitiator was beta-treated at 300 ° C / 20min beta condition under nitrogen atmosphere.
- UV exposure using a high-pressure mercury lamp with an illuminance of 50 W / cm 2 measured with i-line (365 nm) was performed for 1 minute in a nitrogen atmosphere, and then a beta of 150 ° C / 20 min in a nitrogen atmosphere Beta on condition.
- these substrates were rinsed with toluene, and the film thickness before and after the toluene rinse was measured with a stylus type film thickness meter (Alphastep manufactured by KLA Tencor).
- Trenchrins was carried out by the method of placing toluene on the substrate with the surface tension raised with a spin coater, rotating at 4000 rpm, and shaking off the toluene on the substrate. The results are shown in Table 1.
- Cross-linking agent type of polymer compound photo-initiator type and toluene rinse Toluene rinse Composition Amount added Amount before film thickness After film thickness
- Example 3 Polymerized ⁇ -product 1 Thigh A (25 parts) 1369 (0.5 part) 50 nm 50 nm
- Example 5 Polymer Compound 1 DPHA (25 parts) TAZPP (0.5 part) 50 nm 50 nm
- Example 7 polymer compound 4 awakening A (25 parts) additive-free 40 nm 20 nm
- DPHA Dipentaerythritol hexaatalylate (KAYARAD DPHA manufactured by Nippon Kayaku)
- TPE—A Trispentaerythritol otata acrylate (Guangei Chemical)
- Butanediol ditalylate 1, 4 Butanediol ditalylate (Alfa Aesar)
- HMM Hexamethoxymethylmelamine crosslinker represented by the following formula
- TAZPP Triazine PP; Photoinitiator made by Nippon Siebel Hegner
- Examples 1 to 9 and Comparative Example 4 were formed by spin coating, and as shown in Table 1, those containing no photoinitiator and beta beta condition 300 ° CZ20min in a nitrogen atmosphere, those containing photoinitiators, i ray for 1 minute UV exposure light illuminance was measured by the high-pressure mercury lamp 50WZcm 2 at (365 nm) under a nitrogen atmosphere Thereafter, beta was performed under a nitrogen condition of 150 ° CZ20min in a nitrogen atmosphere (Examples 10-19 and Comparative Example 7).
- a glass substrate with an ITO film with a thickness of 150 nm formed by sputtering is spin-coated using a solution of PEDOT: poly (ethylene dioxythiophene) Z polystyrene sulfonic acid (Starkvitech, Baytron). Then, the film was dried on a hot plate at 200 ° C. for 10 minutes to form a PEDOT layer as a hole injection layer with a thickness of 50 nm (Comparative Examples 5 and 6). Slight haze was observed in the film of the hole injection layer formed from the solution containing a large amount of the crosslinking agent in Example 1. In other hole injection layers, smooth films without haze were obtained.
- PEDOT poly (ethylene dioxythiophene) Z polystyrene sulfonic acid
- the polymer compound was dissolved in 0.5 wt% of toluene, and the additives were mixed and dissolved in the types and addition amounts shown in Table 2. Then 0.2 micron diameter Teflon (registered trademark)
- a film having a thickness of about 70 nm was formed by spin coating using the prepared polymer light emitting coating solution. Further, this was dried at 90 ° C. under reduced pressure for 1 hour, and then a cathode buffer layer was deposited by depositing lithium fluoride at 4 nm, cathode as calcium, 5 nm, and then aluminum by lOOnm to produce an organic EL device. .
- the degree of vacuum in vapor deposition were all 1 ⁇ 9 X 10- 5 Torr.
- the film coated with the polymer solution composition of the example was cured by the action of heat or light, the dissolution of the film after toluene rinsing was suppressed, and the layer was formed by wet coating. A structure can be formed.
- the hole injection layer made from the polymer solution composition of the example was used as compared with the polymer light emitting device using the hole injection layer of the PEDOT layer of the comparative example. The polymer light emitting device showed a marked improvement in efficiency.
- the layer using the cross-linking agent having an aromatic ring in the molecule of Comparative Example 4 was less effective as shown in Table 2, although dissolution of the film after toluene rinsing was suppressed.
- the polymer compound is lwt% in toluene, and the additives are shown in Table 3. Mixed and dissolved in the kind and amount added. Thereafter, the solution was filtered through a 0.2 micron Teflon (registered trademark) filter to prepare a coating solution.
- Teflon registered trademark
- the obtained solution was formed on a glass substrate by spin coating. This was beta-betad under a nitrogen atmosphere at 300 ° C / 20min. Thereafter, these substrates were rinsed with toluene, and the film thickness before and after the toluene rinse was measured with a stylus type film thickness meter (DEKTAK manufactured by Beco). Toluene rinsing was carried out by a method such as using a spin coater to place toluene on a substrate in a raised state with surface tension, rotating at 4000 rpm, and shaking off the toluene on the substrate. The results are shown in Table 3.
- OXT121 Toagosei's cross-linking agent represented by the following formula
- Example 20 A solution of Example 20, Comparative Examples 8 and 9 was formed by spin coating on a glass substrate with a 150 nm thick ITO film formed by sputtering, and 300 ° C / 20 min in a nitrogen atmosphere. Beta of the beta conditions.
- Polymer compound 5 was dissolved in toluene in an amount of lwt%. Thereafter, the solution was filtered through a 0.2 micron Teflon (registered trademark) filter to prepare a coating solution.
- Teflon registered trademark
- a film having a thickness of about 70 nm was formed by spin coating using the prepared polymer light emitting coating solution. Further, this was dried at 90 ° C. under reduced pressure for 1 hour, and then a cathode buffer layer was deposited by depositing lithium fluoride at 4 nm, cathode as calcium, 5 nm, and then aluminum by lOOnm to produce an organic EL device. .
- the degree of vacuum in vapor deposition were all 1 ⁇ 9 X 10- 5 Torr.
- the film coated with the polymer solution composition of the example was cured by the action of heat or light, the dissolution of the film after toluene rinsing was suppressed, and the layer was formed by wet coating. A structure can be formed.
- the polymer solution composition of the example compared to the polymer light emitting device using the hole injection layer of the comparative example, used a hole injection layer made from the polymer injection composition. The molecular light emitting device showed a marked improvement in efficiency.
- the layer using the crosslinking agent having an aromatic ring in the molecule of Comparative Example 9 was less effective as shown in Table 4, although dissolution of the film after toluene rinsing was suppressed. .
- the polymer composition of the present invention can easily form a layer structure, and has an excellent element performance.
- An element can be provided.
- organic EL devices made using them are preferable for devices such as liquid crystal display knock lights or curved or flat light sources for illumination, segment type display devices, dot matrix flat panel displays, etc. Can be used.
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Abstract
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US11/912,681 US8268193B2 (en) | 2005-05-17 | 2006-05-17 | Polymer composition for organic electroluminescence |
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WO2009069820A1 (ja) * | 2007-11-29 | 2009-06-04 | Sumitomo Chemical Company, Limited | 有機エレクトロルミネッセンス素子及びその製造方法 |
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TW200619300A (en) * | 2004-08-31 | 2006-06-16 | Sumitomo Chemical Co | Luminescent-polymer composition and luminescent -polymer device |
-
2006
- 2006-05-17 KR KR1020077026677A patent/KR20080007611A/ko not_active Application Discontinuation
- 2006-05-17 CN CNB2006800166570A patent/CN100559629C/zh not_active Expired - Fee Related
- 2006-05-17 TW TW095117432A patent/TW200700483A/zh unknown
- 2006-05-17 US US11/912,681 patent/US8268193B2/en active Active
- 2006-05-17 EP EP06746526A patent/EP1885009A4/en not_active Withdrawn
- 2006-05-17 WO PCT/JP2006/309823 patent/WO2006123696A1/ja active Application Filing
Patent Citations (3)
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WO1997007167A1 (fr) * | 1995-08-11 | 1997-02-27 | Nitto Chemical Industry Co., Ltd. | Composition conductrice reticulable, conducteur et procede de fabrication |
JP2003073666A (ja) * | 2001-06-21 | 2003-03-12 | Showa Denko Kk | 有機発光素子および発光材料 |
JP2005243300A (ja) * | 2004-02-24 | 2005-09-08 | Sanyo Electric Co Ltd | 有機エレクトロルミネッセント素子及びその製造方法 |
Non-Patent Citations (1)
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See also references of EP1885009A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008149829A1 (ja) * | 2007-05-30 | 2008-12-11 | Sumitomo Chemical Company, Limited | 有機エレクトロルミネッセンス素子および該素子を用いた表示装置 |
JP2009010343A (ja) * | 2007-05-30 | 2009-01-15 | Sumitomo Chemical Co Ltd | 有機エレクトロルミネッセンス素子および該素子を用いた表示装置 |
WO2009069820A1 (ja) * | 2007-11-29 | 2009-06-04 | Sumitomo Chemical Company, Limited | 有機エレクトロルミネッセンス素子及びその製造方法 |
JP2009152564A (ja) * | 2007-11-29 | 2009-07-09 | Sumitomo Chemical Co Ltd | 有機エレクトロルミネッセンス素子及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN100559629C (zh) | 2009-11-11 |
EP1885009A1 (en) | 2008-02-06 |
TW200700483A (en) | 2007-01-01 |
CN101176219A (zh) | 2008-05-07 |
EP1885009A4 (en) | 2009-12-30 |
KR20080007611A (ko) | 2008-01-22 |
US20090302278A1 (en) | 2009-12-10 |
US8268193B2 (en) | 2012-09-18 |
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