US5374489A
Expired / Lapsed
US
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Organic electroluminescent device
Assignee: Bando Chemical Industries Ltd
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Filing: 1993-03-26
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Granted: 1994-12-20
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Expires: 2013-03-26
Abstract
Abstract An organic electroluminescent device having an organic emitting layer and a hole transport layer laminated with each other and arranged between a cathode and an anode, and the hole transport layer is made of tris-phenothiazinyl-triphenylamine or tris-phenoxazinyl-triphenylamine derivative. The hole transport layer has a high heat-resistant property and high conductivity to improve durability and emits light at a high luminance and a high efficiency upon application of a low voltage.
Inventors
- 👤 Kunio Imai
- 👤 Takeo Wakimoto
- 👤 Yasuhiko Shirota
- 👤 Hiroshi Inada
- 👤 Tomokazu Kobata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:29
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22; C07D279/24; C07D279/26; C07D265/00; C07D265/28; C07D265/34; C07D265/38; H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
An organic electroluminesent device comprising a cathode, an emitting layer of an organic compound, a hole transport layer of an organic compound and an anode which are laminated in sequence, wherein said organic compound of said hole transport layer is made of a tris-phenoxazinyl-triphenylamine derivative represented by the following chemical formula ##STR10## where R each independently represents a hydrogen atom, alkyl group of from 1 to 6 carbon atoms, a halogen group, a cyano group, a nitro group, a primary, secondary or tertiary amino group, an aryl group of from 6 to 14 carbon atoms, an aralkyl group or an alkoxy group.
Claim 2
Dependent Claim
102 words
An organic electroluminesent device comprising a cathode, an emitting layer of an organic compound, a hole transport layer of an organic compound and an anode which are laminated in sequence, wherein said organic compound of said hole transport layer is made of a tris-phenoxazinyl-triphenylamine derivative represented by the following chemical formula ##STR10## where R each independently represents a hydrogen atom, alkyl group of from 1 to 6 carbon atoms, a halogen group, a cyano group, a nitro group, a primary, secondary or tertiary amino group, an aryl group of from 6 to 14 carbon atoms, an aralkyl group or an alkoxy group.
Claim 3
Dependent Claim
23 words
An organic electroluminescent device according to claim 1, wherein an organic electron transport layer is provided between said cathode and said emitting layer.
References Cited (Backward Citations)
EP0508562A1
Cited
EP0517542A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |