光电子快报(英文版), 2017, 13 (2): 116, Published Online: Sep. 13, 2018  

Green phosphorescent organic light-emitting devices based on different electron transport layers combining with fluorescent sub-monolayer

Author Affiliations
College of Physics and Information Engineering, Quanzhou Normal University, Quanzhou 362000, China
Abstract
We report a small molecule host of 4,4(-N,N)-dicarbazole-biphenyl (CBP) doped with 8% tris(2-phenylpyridine) iridium (Irppy3) for use in efficient green phosphorescent organic light-emitting devices (PHOLEDs) combined with different electron transport layers of Alq and BAlq. The PHOLEDs exhibit maximum current efficiency and power efficiency of 19.8 cd/A and 6.21 lm/W, respectively. The high performance of such PHOLEDs is attributed to the better electron mobile ability of BAlq and sub-monolayer quinacridone (QAD) as carrier trapping layer and equal charge carrier mobilities of hole and electron to form the broad carrier recombination zone in the emitting layer, which can reduce the triplet-triplet annihilation and improve the efficiency of the device.

YANG Hui-shan, GUO Hui-yu, WU Li-shuang. Green phosphorescent organic light-emitting devices based on different electron transport layers combining with fluorescent sub-monolayer[J]. 光电子快报(英文版), 2017, 13(2): 116.

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