Organic electroluminescence devices using pyrazolo[3,4b]quinoxaline derivatives
US6861162B2 · kind B2 · utility
2Cited by
2References
3Claims
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Key dates
| Filing date | Aug 28, 2002 |
| Grant date | Mar 1, 2005 |
| Priority date | — |
| Expiry date | Dec 2, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An organic electroluminescence device which includes an anode, a cathode, a hole transport layer, an electron transport layer, and at least one organic luminescent medium doped with a pyrazolo[3,4b]quinoxaline derivative is disclosed. The present device provides improved efficiency, and the emission band associated therewith is surprisingly narrow. The improved green emitting organic electroluminescence device exhibits high color purity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.