High-efficiency monochrome organic light emitting diodes employing enhanced microcavities
High-efficiency monochrome organic light emitting diodes employing enhanced microcavities
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DOI：
10.1063/1.2966784
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发表时间：
2008-08
影响因子：
4
通讯作者：
R. Meerheim;R. Nitsche;K. Leo
中科院分区：
文献类型：
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作者：
R. Meerheim;R. Nitsche;K. Leo
我们演示了通过在氧化铟锡（ITO）阳极上添加银层来增强底部发射单色高效红、绿、蓝有机发光二极管的光脱耦。该装置包含磷光发射染料三（2-苯基吡啶）铱和铱（III）二[2-甲基二苯并-(f, h)喹啉]（乙酰丙酮）和蓝色单线态发射体2,2 ',7,7 ' -四基斯2,2-（二苯乙烯基）螺-9,9 ' -二芴。我们遵循p-i-n掺杂的概念来提高功率效率。红色达到81 lm/W，绿色达到101 lm/W，蓝色达到4.0 lm/W。与标准ITO器件相比，这些效率提高了2.3倍，我们将其归因于阴极和银层之间的微腔放大。
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 2,2′,7,7′-tetrakis 2,2-(diphenylvinyl)spiro-9,9′-bifluorene. We follow the p-i-n 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.