Organic light emitting device having surface-treated bottom electrode
US8058796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2007 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Sep 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B33/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method of manufacturing an organic light emitting device, which comprises the steps of successively stacking a bottom electrode, an organic layer including an emission layer, and a top electrode, the method further comprising the step of: surface-treating the bottom electrode with ion beam etching before stacking the organic layer. By effectively removing impurities such as polymer materials or oxidation films, which are formed on the bottom electrode of the organic light emitting device, not only electron injection and hole injection in the organic light emitting device progress smoothly, but also an operation voltage is lowered and performance reliability can ensured because the surface roughness of the bottom electrode is maintained at the same level before and after ion milling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.