Organic electroluminescent materials and devices
US10636983B2 · kind B2 · utility
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34References
20Claims
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Key dates
| Filing date | Mar 7, 2019 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Mar 7, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Imidazophenanthridine ligands and metal complexes are provided. The compounds exhibit improved stability through a linking substitution that links a nitrogen bonded carbon of an imidizole ring to a carbon on the adjacent fused aryl ring. The compounds may be used in organic light emitting devices, particularly as emissive dopants, providing devices with improved efficiency, stability, and manufacturing. In particular, the compounds provided herein may be used in blue devices having high efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.