Fluorescent organic light emitting elements having high efficiency
US9853224B2 · kind B2 · utility
4Cited by
1References
22Claims
0Family size
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Key dates
| Filing date | Mar 30, 2015 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/549
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to organic light emitting elements, comprising thermally activated delayed fluorescence (TADF) emitters and/or hosts on basis of benzotriazoles, which have a sufficiently small energy gap between S1 and T1 (ΔEST) to enable up-conversion of the triplet exciton from T1 to S1. The organic light emitting elements show high electroluminescent efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.