Management of Singlet and Triplet Excitons: A Universal Approach to High-Efficiency All Fluorescent WOLEDs with Reduced Efficiency Roll-Off Using a Conventional Fluorescent Emitter

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• 作者：Zhongbin Wu ; Ling Yu ; Xiaokang Zhou ; Qingxun Guo ; Jiajia Luo ; Xianfeng Qiao ; Dezhi Yang ; Jiangshan Chen ; Chuluo Yang and Dongge Ma
• 刊名：Advanced Optical Materials
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：4
• 期：7
• 页码：1067-1074
• 全文大小：2036K
• ISSN：2195-1071

文摘

High-efficiency all-fluorescent white organic light-emitting diodes (WOLEDs) are demonstrated by employing a blue thermally activated delayed fluorescent as the host or assistant dopant and a conventional orange emitter. The resulting warm WOLEDs, using thermally activated delayed fluorescence as the host, show a record external quantum efficiency of 14.0% and a power efficiency of 48.0 lm W⁻¹, together with an extremely low efficiency roll-off.