Organic electroluminescent light emitting devices
US6215245A · kind A · utility
20Cited by
3References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Apr 10, 2001 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
Abstract
An organic EL device comprises a film form of cathode prepared by a sputtering technique, and formed of an alloy of sodium and/or potassium. This cathode is improved in terms of its adhesion to the interface between the cathode and an organic layer and electron injection efficiency, resulting in light emission property improvements. In addition, this cathode causes less damage to the organic layer, is effective for prevention of occurrence of dark spots, and suffers from little or no degradation of performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.