Organic light emitting device structure for obtaining chromaticity stability
US7211823B2 · kind B2 · utility
27Cited by
23References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2004 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Jan 20, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/10
Abstract
The present invention relates to organic light emitting devices (OLEDs). The devices of the present invention are efficient white or multicolored phosphorescent OLEDs which have a high color stability over a wide range of luminances. The devices of the present invention comprise an emissive region having at least two emissive layers, with each emissive layer comprising a different host and emissive dopant, wherein at least one of the emissive dopants emits by phosphorescence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.