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High-efficiency monochrome organic light emitting diodes employing enhanced microcavities
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/content/aip/journal/apl/93/4/10.1063/1.2966784
2008-08-01
2014-08-31

Abstract

We demonstrate enhanced light outcoupling from bottom emitting monochrome high-efficiency red, green, and blue organic light emitting diodes by adding silver layers on the indium tin oxide (ITO) anode. The devices contain the phosphorescent emitting dyes tris(2-phenylpyridine)iridium and iridium(III)bis[2-methyldibenzo-(f, h)quinoxaline](acetylacetonate), and the blue singlet emitter 2,,7,-tetrakis 2,2-(diphenylvinyl)spiro-9,-bifluorene. We follow the doping concept to increase the power efficiencies. We reach 81 lm/W for red, 101 lm/W for green, and 4.0 lm/W for blue color. These efficiencies are improved by up to a factor of 2.3 compared to standard ITO devices, which we attribute to microcavity amplification between the cathode and the Ag layer.

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Scitation: High-efficiency monochrome organic light emitting diodes employing enhanced microcavities
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/4/10.1063/1.2966784
10.1063/1.2966784
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