Organic electroluminescent device with carrier blocking layer interposed between two emitting layers
US7737625B2 · kind B2 · utility
7Cited by
6References
11Claims
0Family size
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Key dates
| Filing date | Mar 15, 2005 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Oct 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An organic electroluminescent device including in sequence an anode, a first emitting layer (5), a carrier barrier layer (6), a second emitting layer (7) and a cathode stacked; wherein the ionization potential of the carrier barrier layer (6) is more than the ionization potential of the first emitting layer (5) by 0.1 eV or more and the affinity level of the carrier barrier layer (6) is less than the affinity levels of the first emitting layer (5) and the second emitting layer (7) by 0.1 eV or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.