Plurality of host materials and organic electroluminescent device comprising the same
US10490752B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2016 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Oct 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/90
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to an organic electroluminescent device comprising at least one light-emitting layer disposed between an anode and a cathode, wherein the light-emitting layer comprises a host and a phosphorescent dopant, wherein the host comprises a plurality of host compounds, wherein at least a first host compound of the plurality of host compounds has an amine-carbazole structure substituted with naphthyl-phenyl and aryl (Formula 1), and a second host compound has a di-C-benzocarbazole structure comprising nitrogen-containing heteroaryl (Formula 2). By using the plurality of host compounds of the present disclosure, the organic electroluminescent device may have long lifespan while maintaining high efficiency at high luminance compared to the conventional organic electroluminescent device using a sole host compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.