Luminescent semi-conductive polymer material, method of preparing the same and organic light emitting element having the same
US7951618B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 21, 2008 |
| Grant date | May 31, 2011 |
| Priority date | — |
| Expiry date | Dec 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention is related to a luminescent material generated by polymerization of a pyrromethene complex by glow discharge. The polymer material of the present invention exhibits semi-conductive properties and has a luminescence maximum in a spectrum region in the range of about 540 nm to about 585 nm with a half-width of the luminescence band in the range of about 55 nm to about 75 nm, a quantum yield of photoluminescence in the range of about 0.6 to about 0.8, and an electric conductivity at a temperature of about 20° C. in the range of about 1×10−10 S/cm to about 5×10−10 S/cm. The resultant polymer layer has a thickness in the range of about 0.01 μm to about 10 μm on a substrate placed between or on any of the electrodes. The starting pyrromethene complex may be a 1,3,5,7,8-pentamethyl-2, 6-diethylpyrromethene difluoroborate complex (pyrromethene 567). Additionally, the luminescent polymer material may be formed as a layer on a substrate having conductive coating, such as a metal, a dielectric material or semi-conductive material, for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.