Light-emitting diode and light-emitting device including the same
US11355710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2018 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Dec 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
The present disclosure relates to a light-emitting diode (LED) in which an organic compound including an imidazolium-based cationic moiety and an amine-based anionic moiety substituted with a strong electron-withdrawing group such as a sulfonyl group or a cyano group is applied to a hole transfer layer, and a light-emitting device. By applying the organic compound according to the present disclosure to the hole transfer layer, an energy barrier between the hole transport layer and an emitting material layer is removed, and an LED having improved hole transport properties can be designed. Therefore, it is possible to realize and manufacture an LED and a light-emitting device, driven at a low voltage and having improved luminous efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.