Organic electroluminescent materials and devices
US11744141B2 · kind B2 · utility
2Cited by
33References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2018 |
| Grant date | Aug 29, 2023 |
| Priority date | — |
| Expiry date | Dec 26, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/103
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound having the formula [LA]yIr[LB]x is disclosed, where LA is selected from one of the following: The compounds have at least one pyridyl dibenzo-substituted ligand that coordinates to metal center from the sterically hindered position as exemplified by LA. Because of this unique configuration, the compounds display better photo-physical and thermal properties and can be used in OLED devices to improve their performance, particularly with respect to the device's lifetime.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.