EP0443861A2
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EP
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Organic electroluminescence device
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1991-02-22
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Granted: —
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Expires: 2011-02-22
Abstract
Abstract An organic electroluminescence device having a light emitting layer or a light emitting layer and a charge transport layer disposed between a pair of electrodes at least one of which is transparent or semi-transparent, the light emitting layer comprising a conjugated polymer having a repeating unit of the general formula (1): -Ar₁ - CH = CH- (1) where Ar₁ represents an aromatic hydrocarbon group of 6 to 14 carbon atoms which is unsubstituted or substituted by one or two hydrocarbon or alkoxy groups of 1 to 22 carbon atoms. The conjugated polymer may also be used as a charge transport material or a buffer layer to an electrode, in an electroluminescence device.
Inventors
- 👤 Tsuyoshi Nakano
- 👤 Shuji Doi
- 👤 Takanobu Noguchi
- 👤 Toshihiro Ohnishi
- 👤 Yasushi Iyechika
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C08; C08G; C08G61/00; C09; C09K; C09K11/00; C09K11/06; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H10K85/00; H10K85/10; H10K85/111; H10K85/114; H10K50/14; H10K50/17; H10K85/60; H10K85/615; H10K85/621; H10K85/631; H10K85/649; H10K85/656; H10K85/6565
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
An organic electroluminescence device having a light emitting layer or a light emitting layer and a charge transport layer disposed between a pair of electrodes at least one of which is transparent or semitransparent; the light emitting layer comprising a conjugated polymer having a repeating unit of general formula (1): -Ar₁ - CH = CH- (1) where Ar₁ is an aromatic hydrocarbon group of 6 to 14 carbon atoms which is unsubstituted or substituted by one or two hydrocarbon or alkoxy groups of 1 to 22 carbon atoms.
Claim 2
Dependent Claim
27 words
An organic electroluminescence device according to claim 1, wherein Ar₁ is p-phenylene, 2,6-naphthalenediyl, 9,10-anthracenediyl, mono C₁₋₂₂ alkyl-p-phenylene, mono C₁₋₂₂ alkoxy-p-phenylene, 2,5-di C₁₋₂₂ alkyl-p-phenylene or 2,5-di C₁₋₂₂ alkoxy-phenylene.
Claim 3
Dependent Claim
19 words
An organic electroluminescence device according to claim 2 wherein Ar₁ is p-phenylene, 2,5-di C₁₋₂₂ alkyl-p-phenylene or 2,5-di C₁₋₂₂ alkoxy-p-phenylene.
Claim 4
Dependent Claim
18 words
An organic electroluminescence device according to claim 3, wherein Ar₁ is p-phenylene, 2,5-dimethoxy-p-phenylene, 2,5-diethoxy-p-phenylene, 2,5-dibutoxy-p-phenylene, 2,5-diheptyloxy-p-phenylene or 2,5-dilauryloxy-p-phenylene.
Claim 5
Dependent Claim
96 words
An organic electroluminescence device according to any one of the preceding claims wherein the conjugated polymer is obtainable by heat treating at a temperature from 80 to 200°C a polymer intermediate having a repeating unit of general formula (4): where Ar₁ is as defined in claim 1 and which are R₁ and R₂ which are same or different, are alkyl of 1 to 8 carbon atoms and X⁻ is a counteranion, of the general formula (5): where Ar₁ is as defined in claim 1 and R₃ is a hydrocarbon group of 1 to 12 carbon atoms.
Claim 6
Dependent Claim
62 words
An organic electroluminescence device according to any one of claims 1 to 4 wherein the conjugated polymer is obtainable by condensation polymerisation in solution, and in the presence of an alkali, of a dihalogenide compound of the general formula (6): X₂ - CH₂ - AR₁ - CH₂ - X₂ (6), where Ar₁ is as defined in claim 1 and X₂ is halogen.
Claim 7
Dependent Claim
109 words
An organic electroluminescence device having a light emitting layer and a charge transport layer disposed between a pair of electrodes at least one of which is transparent or semi-transparent; the charge transport layer comprising a conducting polymer having a repeating unit of the general formula (2): -Ar₂-B- (2) where Ar₂ represents an aromatic hydrocarbon group of 6 to 14 carbon atoms, or a heterocyclic aromatic hydrocarbon group of 4 to 6 carbon atoms containing nitrogen, sulfur or oxygen, which aromatic group is unsubstituted or substituted by one or two hydrocarbon or alkoxy groups of 1 to 22 carbon atoms and B is a -CH = CH- or -NH- group.
Claim 8
Dependent Claim
128 words
An organic electroluminescence device having a light emitting layer, a charge transport layer and a conducting polymer buffer layer disposed between a pair of electrodes at least one of which is transparent or semi-transparent; the conducting polymer buffer layer being disposed between the charge transport layer and one of the electrodes and the conducting polymer having a repeating unit of the general formula (2): -Ar₂ - B - (2) where Ar₂ represents an aromatic hydrocarbon group of 6 to 14 carbon atoms, or a heterocyclic aromatic hydrocarbon group of 4 to 6 carbon atoms containing nitrogen, sulphur or oxygen, which aromatic group is unsubstituted or substituted by one or two hydrocarbon or alkoxy groups of 1 to 22 carbon atoms and B represents a -CH = CH-or-NH- group.
Claim 9
Dependent Claim
36 words
An organic electroluminescence device according to claim 7 or 8, wherein Ar₂ is p-phenylene, mono C₁₋₂₂ alkyl-P-phenylene, mono C₁₋₂₂ alkoxy-p-phenylene, 2,5-di C₁₋₂₂ alkyl-p-phenylene, 2,5-di C₁₋₂₂ alkoxy-p-phenylene, 2,5-thienylene or 3-C₁₋₂₂ alkyl-2,5-thienylene, and B is -CH = CH-.
Claim 10
Dependent Claim
18 words
An organic electroluminescence device according to claim 9, wherein Ar₂ is p-phenylene, 2,5-dimethoxy-p-phenylene, 2,5-diethoxy-p-phenylene, 2,5-dipropoxy-p-phenylene, 2,5-dibutoxy-p-phenyelene or 2,5-thienylene.
Claim 11
Dependent Claim
16 words
An organic electroluminescence device according to claim 7 or 8, wherein the conducting polymer is polyaniline.
Claim 12
Dependent Claim
32 words
An organic electroluminescence device according to any claim 7 ot 8, wherein said light emitting layer comprises a monomer which is tris(8-hydroxyquinoline) aluminium, tetraphenylbutadiene, tetraphenylcyclopentadiene, perylene, 4-dicyanomethylene- 6-(p-dimethylaminostyryl)-2-methyl-4H pyran and 1,3- diethyl-5[2-(3-ethyl-2-benzothiazolinilidene)ethylidene]-2-thiohydantoin.
Claim 13
Dependent Claim
97 words
An organic electroluminescence device according to any one of claims 7 to 12, wherein the conducting polymer is obtainable by heat treating at a temperature from 200 to 400°C a polymer intermediate having a repeating unit of general formula (4): where Ar₁ is as defined in claim 1 and which are R₁ and R₂ which are same or different, are alkyl of 1 to 8 carbon atoms and X⁻ is a counteranion, of the general formula (5): where Ar₁ is as defined in claim 1 and R₃ is a hydrocarbon group of 1 to 12 carbon atoms.
Claim 14
Dependent Claim
76 words
An organic electroluminescence device according to any one of claims 7 to 12 wherein the conducting polymer is obtainable by condensation polymerisation in solution, and in the presence of an alkali, of a dihalogenide compound of the general formula (6): X₂ - CH₂ - Ar₁ - CH₂ - X₂ (6), where Ar₁ is as defined in claim 1 and X₂ is halogen and then heat treating the resulting product at a temperature of 200° to 400°C.
References Cited (Backward Citations)
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