Organic electroluminescence device
US11437597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2019 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Jun 5, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/40
Abstract
An organic electroluminescence device includes a first electrode, a hole transport region disposed on the first electrode, a first emission layer disposed on the hole transport region and including a first light-emitting host and a first light-emitting dopant, a second emission layer disposed on the first emission layer and including a first electron transport material and a second light-emitting dopant, an electron transport region disposed on the second emission layer and including a second electron transport material, and a second electrode disposed on the electron transport region, wherein a triplet energy of the first light-emitting host (T1a), a triplet energy of the second light-emitting dopant (T1b) and a triplet energy of the second electron transport material (T1c) satisfy a relation of T1a<T1b<T1c. High emission efficiency may be shown.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.