Organic light-emitting device with light transmissive anode and light transmissive cathode including zinc-doped indium oxide
US5969474A · kind A · utility
112Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Oct 24, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/3031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An organic EL light emitting device has a light emitting layer between a cathode and an anode. Both the cathode and the anode are light transmissive. The cathode includes a conductor layer of a metal or alloy with a work function of up to 4 eV having a thickness of up to 10 nm on the light emitting layer side, a transparent electrode of zinc-doped indium oxide on a side remote from the light emitting layer, and optionally a buffer layer between the conductor layer and the transparent electrode. Light emission can exit from the device on both the cathode and anode sides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.