Organic light emitting element, display apparatus, image pickup apparatus, and illumination apparatus
US10840470B2 · kind B2 · utility
5Cited by
0References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 28, 2019 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Mar 28, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
One embodiment of this invention has a first electrode, a first light emitting layer, and a second electrode, in which the first light emitting layer has a first host material and a first dopant material, a lowest triplet excitation energy of the first host material is higher than a lowest triplet excitation energy of the first dopant material, and, when a weight of the first light emitting layer is set to 100 wt %, a concentration of the first dopant material is 0.3 wt % or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.