Light-emitting element, display module, lighting module, light-emitting device, display device, electronic appliance, and lighting device
US10439005B2 · kind B2 · utility
12Cited by
50References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2016 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Nov 2, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
Abstract
A multicolor light-emitting element that utilizes fluorescence and phosphorescence and is advantageous for practical application is provided. The light-emitting element has a stacked-layer structure of a first light-emitting layer containing a host material and a fluorescent substance and a second light-emitting layer containing two kinds of organic compounds and a substance that can convert triplet excitation energy into luminescence. Note that light emitted from the first light-emitting layer has an emission peak on the shorter wavelength side than light emitted from the second light-emitting layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.