Organic electroluminescence device and organic electroluminescence display
US7193361B2 · kind B2 · utility
3Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2005 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Jan 24, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is an organic EL device in which an anode, a hole injection layer, a first carrier transportation layer, a first luminescent layer, a second carrier transportation layer, a second luminescent layer, an electron transportation layer, and a cathode are formed on a glass substrate in order, wherein layers with a smaller electron affinity Ea and a larger energy gap Eg than those of the first and second luminescent layers are employed for the first and second carrier transportation layers, so as to enhance the emission efficiency of the first and second luminescent layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.