Patent EP0622975A1 successfully refreshed from Google Patents.
EP0622975A1
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EP
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Thin-film electroluminescent device
Assignee: IDEM
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Filing: 1994-04-28
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Granted: —
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Expires: 2014-04-28
Abstract
Abstract The thin-film electroluminescent device of the present invention comprises a thin film of a polyoxadiazole derivative represented by the formula: wherein each of X₀ and Y₀ independently represents a divalent organic group which may comprise a silicon atom, and n is an integer of 2 or greater, formed as an electroluminescent layer or a charge injecting/transporting layer between electrodes, at least one thereof being transparent.
Inventors
- 👤 Hideyuki C/O Mitsui Petr.Ind.Ltd. Murata
- 👤 Takahiro C/O Mitsui Petr.Ind.Ltd. Fujiyama
- 👤 Tooru C/O Mitsui Petr.Ind.Ltd. Yamanaka
- 👤 Shogo Saito
- 👤 Tetsuo Tsuitsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 23:26
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C09; C09K; C09K11/00; C09K11/06; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H10K85/00; H10K85/10; H10K85/111; H10K85/151; H10K85/40; H10K85/60; H10K85/649; H10K85/656; H10K85/6565; H10K2102/00; H10K2102/10; H10K2102/101; H10K2102/103; H10K85/615; H10K85/621; H10K85/631; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A thin-film electroluminescent device comprising an electroluminescent layer interposed between electrodes, at least one thereof being transparent, wherein the electroluminescent layer comprises a polyoxadiazole derivative, formed by the vapor deposition polymerization process, represented by the formula: wherein each of X₀ and Y₀ independently represents a divalent organic group which may comprise a silicon atom, and n is an integer of 2 or greater.
Claim 2
Dependent Claim
68 words
A thin-film electroluminescent device comprising an electroluminescent layer interposed between electrodes, at least one thereof being transparent, and a charge injecting/transporting layer interposed between at least one of the electrodes and the electroluminescent layer, wherein at least one of the electroluminescent layer and the charge injecting/transporting layer comprises a polyoxadiazole derivative formed by the vapor deposition polymerization process, represented by the formula (I) as defined in claim 1.
Claim 3
Dependent Claim
101 words
A device according to claim 2, wherein the electroluminescent layer comprises a polyoxadiazole derivative formed by the vacuum deposition polymerization process, represented by the formula I as defined in claim 1, and wherein the charge injecting/transporting layer comprises polyoxadiazole derivatives formed by the vapor deposition polymerization process, represented by the formula: wherein each of X₀ and Y₀ independently represents a divalent organic group which may comprise a silicon atom, and n is an integer of 2 or greater, provided that at least one of X₀ and Y₀ of formula (I) is different from both of X₀ and Y₀ of formula (II).
Claim 4
Independent Claim
22 words
A device according to any one of the preceding claims which emits a fluorescence having a wavelength of 400 to 600 nm.
Claim 5
Independent Claim
44 words
A device according to any one of the preceding claims wherein the electroluminescent layer comprises a polyoxadiazole derivative of formula (I) and a fluorescent dye or pigment in an amount of 0.01 to 10 % by mole per repeating unit of the polyoxadiazole derivative.
Claim 6
Independent Claim
43 words
A device according to any one of claims 2 to 5 wherein the charge injecting/transporting layer comprises a polyoxadiazole derivative of formula (I), and a charge injecting/transporting additive in an amount of 0.01 to 80% by mole per repeating unit of the polyoxadiazole.
Claim 7
Dependent Claim
17 words
A device according to claim 6 wherein the charge injecting/transporting additive is a diphenoquinone or fluorenone derivative.
Claim 8
Dependent Claim
15 words
A device according to claim 6 wherein the charge injecting/transporting additive is a triphenylamine derivative.
Claim 9
Dependent Claim
14 words
A device according to claim 8 wherein the triphenylamine derivative is 4,4',4''-tris(N,N-diphenylamino)triphenylamine or 4,4',4''-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine.
Claim 10
Independent Claim
63 words
A device according to any one of claims 2 to 9 wherein the charge injecting/transporting layer comprises a silicon-atom containing polyoxadiazole derivative represented by the formula: wherein each of X₁ and Y₁ independently represents a divalent organic group, at least one of X₁ and Y₁ being a divalent organic group having a silicon atom, and n is an integer of 2 or greater.
Claim 11
Dependent Claim
91 words
A device according to claim 10 wherein the charge injecting/transporting layer further comprises a polyoxadiazole derivative containing no silicon atom represented by the formula: wherein each of X₂ and Y₂ independently represents a divalent organic group containing no silicon atom, and n is an integer of 2 or greater, and wherein the content of the silicon-atom containing polyoxadiazole derivative in the charge injecting/transporting layer decreases from the electrode toward the electroluminescent layer, while the content of the polyoxadiazole derivative containing no silicon atom increases from the electrode toward the electroluminescent layer.
References Cited (Backward Citations)
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