Organic light emitting device having stacked electron transport layers
US9184407B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2014 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Jul 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K85/6572
Abstract
An organic light emitting device including: a first electrode, a hole injection layer on the first electrode, a hole transport layer on the hole injection layer, an organic light emitting layer on the hole transport layer, a first electron transport layer on the organic light emitting layer, a second electron transport layer on the organic light emitting layer, an electron injection layer on the second electron transport layer and a second electrode on the electron injection layer, where the first electron transport layer includes a first material for improving a thermal stability, a second material for improving a luminous efficiency and a third material for reducing a driving voltage, and the second electron transport layer is laminated with the first electron transport layer, and the second electrode faces the first electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.