Organic electroluminescent element and organic electroluminescent display
US7871711B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Sep 10, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an organic EL element having a glass substrate and an anode, a hole-injecting layer, a hole-transport layer, a blue light-emitting layer, a hole-blocking layer, an electron-transport layer, and a cathode formed on the glass substrate sequentially in that order, wherein the electron-transport layer contains an electron-transporting material and a light-emitting material having emission-spectrum peak wavelength of longer than 555 nm, and the light-emitting material consumes the holes, thereby preventing degradation of the electron-transporting material, improving blue chromaticity, and elongating the life of the organic EL element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.