Chlorinated Indium Tin Oxide Electrodes with High Work Function for Organic Device Compatibility
Chlorinated Indium Tin Oxide Electrodes with High Work Function for Organic Device Compatibility
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具有高功函数的氯化氧化铟锡电极，可实现有机器件兼容性
DOI：
10.1126/science.1202992
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发表时间：
2011-05-20
期刊：
影响因子：
56.9
通讯作者：
Lu, Z. H.
中科院分区：
文献类型：
--
作者：
Helander, M. G.;Wang, Z. B.;Lu, Z. H.
有机发光二极管中透明电极和活性材料的能级的更紧密匹配提高了效率。在有机发光二极管（OLED）中，多个有机层的堆叠促进电荷从透明电极（掺锡氧化铟，ITO）的低功函数[~4.7电子伏（eV）]流动到有源发光有机材料的深能级（~6 eV）。我们展示了具有> 6.1eV功函数的氯化ITO透明电极，其提供了与现有技术OLED中的活性发光材料的能级的直接匹配。展示了高度简化的绿色OLED，其具有54%的最大外部量子效率（EQE）和使用外耦合增强的230流明每瓦的功率效率，以及在10，000坎德拉每平方米下50%的EQE和110流明每瓦的功率效率。
Closer matching of the energy levels of transparent electrodes and active materials in organic light-emitting diodes improves efficiency. In organic light-emitting diodes (OLEDs), a stack of multiple organic layers facilitates charge flow from the low work function [~4.7 electron volts (eV)] of the transparent electrode (tin-doped indium oxide, ITO) to the deep energy levels (~6 eV) of the active light-emitting organic materials. We demonstrate a chlorinated ITO transparent electrode with a work function of >6.1 eV that provides a direct match to the energy levels of the active light-emitting materials in state-of-the art OLEDs. A highly simplified green OLED with a maximum external quantum efficiency (EQE) of 54% and power efficiency of 230 lumens per watt using outcoupling enhancement was demonstrated, as were EQE of 50% and power efficiency of 110 lumens per watt at 10,000 candelas per square meter.