Highly efficient phosphorescent organic light-emitting diodes based on single-layer structure
Highly efficient phosphorescent organic light-emitting diodes based on single-layer structure
复制标题
基于单层结构的高效磷光有机发光二极管
DOI：
10.1364/ol.44.001722
复制
发表时间：
2019
期刊：
影响因子：
3.6
通讯作者：
Chen Ping
中科院分区：
文献类型：
--
作者：
Sheng Ren;Li Asu;Gao Ying;Duan Yu;Zhao Yi;Chen Ping
We demonstrated highly efficient single-layer organic light-emitting diodes (OLEDs) based on graded-composition architecture. The single-layer OLEDs comprise graded-composition from a mostly hole-transport material at anode to a mostly electron-transport material at cathode. The resulting device with low turn-on voltage of 2.85 V shows maximum power efficiency and current efficiency of 44.8 lm/W and 42.7 cd/A, respectively. It is found that the emission dopant plays an important role to obtain more balanced charge carriers, causing the recombination zone slightly shift to the center of the device. The results of our work suggest that the graded-composition structure represents a path to achieving highly efficient single-layer OLEDs. (C) 2019 Optical Society of America
