Light emitting device
US7635946B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Feb 25, 2005 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Oct 20, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/917
Abstract
To provide an organic electroluminescent device having excellent durability and having high luminous efficiency and luminance, the organic electroluminescent device includes an organic compound layer containing a hole transport layer, a light emitting layer, a block layer, and an electron transport layer between a pair of electrodes, wherein the block layer contains an electron transport material and an electrically inactive organic compound capable of being subjected to dry film formation and having an energy difference Eg between highest occupied molecular orbital and lowest unoccupied molecular orbital of 4.0 eV or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.