Materials and structures for enhancing the performance of organic light emitting devices
US7198859B2 · kind B2 · utility
10Cited by
16References
35Claims
0Family size
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Key dates
| Filing date | Jul 25, 2003 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Mar 15, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24942
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device is provided, having an anode, a cathode, and a first organic layer disposed between the anode and the cathode. The first organic layer produces phosphorescent emission when a voltage is applied between the anode and the cathode. An organic enhancement layer disposed between the first organic layer and the cathode is also provided. The organic enhancement layer is in direct contact with the first organic layer. The organic enhancement layer may comprise a material of structure (I):The material of structure I is thermally stable and is a high energy band gap material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.