Light-emitting element, display device, electronic device, and lighting device
US10096658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2017 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Apr 10, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
Providing a light-emitting element emitting light in a broad emission spectrum. A combination of a first organic compound and a second organic compound forms an exciplex. The first organic compound has a function of converting triplet-excitation energy into light emission. The lowest triplet excitation level of the second organic compound is higher than or equal to the lowest triplet excitation level of the first organic compound, and the lowest triplet excitation level of the first organic compound is higher than or equal to the lowest triplet excitation level of the exciplex. Light emission from a light-emitting layer includes light emission from the first organic compound and light emission from the exciplex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.