Light-emitting element, light-emitting device, electronic device, and lighting device
US10128455B2 · kind B2 · utility
7Cited by
29References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 7, 2016 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Sep 7, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
To increase emission efficiency of a fluorescent light-emitting element by efficiently utilizing a triplet exciton generated in a light-emitting layer. The light-emitting layer of the light-emitting element includes at least a host material and a guest material. The triplet exciton generated from the host material in the light-emitting layer is changed to a singlet exciton by triplet-triplet annihilation (TTA). The guest material (fluorescent dopant) is made to emit light by energy transfer from the singlet exciton. Thus, the emission efficiency of the light-emitting element is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.