High Efficiency Doping-free White Organic Light Emitting Diodes by Combining Exciplex and Phosphorescent Ultrathin Layer

被引：0

作者：

Wang C. ^{[1
]}

Li X.-F. ^{[2
]}

Liu Z.-M. ^{[3
]}

Zhao B. ^{[3
]}

机构：

[1] Huawei Technologies Co., Ltd., Shenzhen

[2] Chengdu CEC Panda Display Technology Co., Ltd., Chengdu

[3] Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2022年 / 43卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Doping-free; Exciplex; Ultrathin layer; White organic light emitting diodes;

D O I：

10.37188/CJL.20210336

中图分类号：

学科分类号：

摘要：

In this work, we prepared doping-free white organic light emitting diodes(WOLED) by combining exciplex and phosphorescent ultrathin layer. As results, high efficiency WOLED based two complementary color structure of Ir(pq)2acac(~0.5 nm)/mCP:PO-T2T/Ir(pq)2acac(~0.5 nm) and red-green-blue(RGB) color structure of Ir(ppy)3(~0.5 nm)/mCP:PO-T2T/Ir(pq)2acac(~0.5 nm) are achieved by setting different colors phosphorescent ultrathin layer on the two sides of blue exciplex emitting layer of mCP:PO-T2T, respectively. The maximum current efficiency, power efficiency and external quantum efficiency of two complementary color WOLED are 46.1 cd/A, 43.9 lm/W and 22.2%, respectively; and the RGB WOLED are 66.8 cd/A, 63.5 lm/W and 24.2%, respectively. The discussions demonstrated the efficient energy transfer from high energy blue exciplex to low energy red and green phosphorescent ultrathin layer is responsible for the high efficiency of doping-free WOLED. © 2022, Science Press. All right reserved.

引用

页码：85 / 93

页数：8

共 29 条

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