Heteroatomic regioregular poly (3-substitutedthiophenes) in electroluminescent devices
US8920939B2 · kind B2 · utility
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Key dates
| Filing date | Sep 26, 2005 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Jun 13, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Regioregular polythiophenes having heteroatoms in the substituents can be used in hole injection layer and hole transport layers for electroluminescent devices. Copolymers and organic oxidants can be used. Homopolymers can be used. Metallic impurities can be removed. The heteroatom can be oxygen and can be substituted at the 3-position. Advantages include versatility, synthetic control, and good thermal stability. Different device designs can be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.