Process for the preparation of organic electroluminescent device using vapor deposition polymerization
US6379743B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2001 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 24, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/103
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing an organic electroluminescent device having a transparent substrate, a transparent electrode layer, a metallic electrode layer, and an organic interlayer containing an electronically active material dispersed in a matrix of polyimide, characterized in that the organic interlayer is prepared by depositing the vapors of a dianhydride, a diamine and the electronically active material to form a polyimide precursor layer containing the active material dispersed therein and thermally imidizing the polyimide precursor layer. The organic luminescent device thus obtained has improved luminous efficiency, thermal stability, interfacial surface roughness and high bulk density of the layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.