Organic electroluminescent materials and devices
US10230060B2 · kind B2 · utility
11Cited by
32References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2018 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Jan 17, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electronic displays including organic light emitting diodes having an organic layer including a compound including a ligand having the formula: is disclosed. In these formulas, each R1, R2, and R3 is independently selected from hydrogen, alkyl, and aryl; at least one of R1 and R2 is a branched alkyl containing at least 4 carbon atoms, where the branching occurs at a position further than the benzylic position; where R1 and R3 are mono-, di-, tri-, tetra-, or no substitutions; and R2 is mono-, di-, or no substitutions. Emissive layers including a host material doped with these heteroleptic iridium complexes are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.