Tandem organic light emitting element and display device including the same
US11974449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2021 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | Aug 23, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/351
Abstract
A light-emitting element may include a first electrode, a second electrode facing the first electrode, a first hole transport layer disposed above the first electrode, a first electron transport layer disposed between the first hole transport layer and the second electrode. A first light-emitting part and a second light-emitting part that emit different light may be disposed between the first hole transport layer and the first electron transport layer. The first light-emitting part may include a first blue emission layer, a second electron transport layer, a charge generation layer, and a second blue emission layer, and the first blue emission layer may be disposed above the first hole transport layer. At least one of the first electron transport layer and the second electron transport layer may be directly disposed above at least one of the first blue emission layer and the second blue emission layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.