Organic electroluminescence element, illumination device, and display device
US9040975B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2012 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Jun 15, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The purpose of the present invention is to provide: an organic electroluminescence element having a plurality of light-emitting dopants of different light-emitting wavelengths and emitting white light, the white-light-emitting organic electroluminescence element having excellent longevity, low-voltage driving, and chromatic stability, and also having a few dark spots; as well as an illumination device and a display device that use the element. This organic electroluminescence element contains at least one light-emitting layer sandwiched between a positive electrode and a negative electrode, the organic electroluminescence element characterized in that the light-emitting layer contribution ratio, defined as the ratio ΔPL/ΔEL of the photoluminescence intensity decay rate to the electroluminescence intensity decay rate, is 0.3 to 1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.