Organic electroluminescent materials and devices
US11495754B2 · kind B2 · utility
1Cited by
34References
20Claims
0Family size
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Key dates
| Filing date | Jan 29, 2020 |
| Grant date | Nov 8, 2022 |
| Priority date | — |
| Expiry date | Nov 23, 2040 |
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 OLEDs, particularly as emissive dopants in the emissive region in the OLEDs, 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.