Kim Bo Seong, Yook Kyoung Soo, Lee Jun Yeob
Department of Polymer Science and Engineering, Dankook University 126, Jukjeon-dong, Suji-gu, Yongin, Gyeonggi, 448-701, Korea.
Sci Rep. 2014 Aug 14;4:6019. doi: 10.1038/srep06019.
High efficiency hybrid type white organic light-emitting diodes (WOLEDs) combining a green thermally activated delayed fluorescent (TADF) emitting material with red/blue phosphorescent emitting materials were developed by manipulating the device architecture of WOLEDs. Energy transfer between a blue phosphorescent emitting material and a green TADF emitter was efficient and could be managed by controlling the doping concentration of emitters. A high quantum efficiency above 20% was achieved in the hybrid WOLEDs by optimizing the device structure of the hybrid type WOLEDs for the first time and the device performances of the hybrid WOLEDs were comparable to those of all phosphorescent WOLEDs.
通过操控白色有机发光二极管（WOLED）的器件结构，开发出了一种高效混合型白色有机发光二极管，该二极管将绿色热激活延迟荧光（TADF）发光材料与红色/蓝色磷光发光材料相结合。蓝色磷光发光材料与绿色TADF发光体之间的能量转移效率很高，并且可以通过控制发光体的掺杂浓度来进行调控。首次通过优化混合型WOLED的器件结构，在混合WOLED中实现了高于20%的高量子效率，且混合WOLED的器件性能与所有磷光WOLED相当。
