US5593788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic electroluminescent devices with high operational stability
Assignee: Global OLED Technology LLC
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Filing: 1996-04-25
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Granted: 1997-01-14
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Expires: 2016-04-25
Abstract
Abstract An organic electroluminescent device of improved efficiency and operational stability has been disclosed. The device comprises of an anode and a cathode, and an organic electroluminescent element disposed between the anode and cathode. Characterized in the organic electroluminescent element is at least one fluorescent emitting layer containing a mixture of two or more materials. The mixture contains a quinacridone compound of the formula: ##STR1## where R 3 and R 4 are independently alkyl, aryl, fused aryl or halogen; and R 5 and R 6 are independently alkyl, substituted alkyl, aryl, or substituted aryl; and n=0, 1, 2 or 3.
Inventors
- 👤 Jianmin Shi
- 👤 Ching W. Tang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:56
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C09; C09K; C09K11/00; C09K11/06; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
An organic EL device comprising an anode and a cathode, and an organic EL element disposed between the anode and cathode; characterized in that the organic EL element has at least one fluorescent emitting layer containing a mixture of two or more materials; the mixture contains a compound of the formula: ##STR17## where R 3 and R 4 are independently alkyl, alkoxyl, substituted alkyl, aryl, fused aryl halogen; and R 5 and R 6 are independently alkyl, alkoxyl, substituted alkyl, aryl, or substituted aryl; and n=0, 1, 2 or 3.
Claim 2
Dependent Claim
90 words
An organic EL device comprising an anode and a cathode, and an organic EL element disposed between the anode and cathode; characterized in that the organic EL element has at least one fluorescent emitting layer containing a mixture of two or more materials; the mixture contains a compound of the formula: ##STR17## where R 3 and R 4 are independently alkyl, alkoxyl, substituted alkyl, aryl, fused aryl halogen; and R 5 and R 6 are independently alkyl, alkoxyl, substituted alkyl, aryl, or substituted aryl; and n=0, 1, 2 or 3.
Claim 3
Dependent Claim
53 words
An organic EL device according to claim 1 in which said mixture contains a metal complex of the formula: ##STR18## wherein Me represents a metal; n is an integer of from 1 to 3; and Z independently in each occurrence represents the atoms completing a nucleus having at least two fused aromatic rings.
Claim 4
Dependent Claim
20 words
An organic EL device according to claim 1 in which R 5 and R 6 are methyl, ethyl, or phenyl.
Claim 5
Dependent Claim
28 words
An organic EL device according to claim 1 in which R 3 and R 4 are hydrogen, and R 5 and R 6 are methyl or tertiary buytl.
Claim 6
Dependent Claim
15 words
An organic EL device according to claim 1 in which the said mixture contains Alq.
References Cited (Backward Citations)
US4769292A
Cited
US5227252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-14 | 2000-07-15 | 2001-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-14 | 2004-07-15 | 2005-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-14 | 2008-07-15 | 2009-01-14 | $7700.00 | Window Closed / Lapsed |