Degradation Mechanisms in Blue Organic Light-Emitting Diodes

作     者：Dan Wang Cong Cheng Taiju Tsuboi Qisheng Zhang 

作者机构：MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027 

出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)

年 卷 期：2020年第2卷第4期

页      面：1278-1296页

学科分类：08[工学] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：supported by the National Natural Science Foundation of China(grant nos.51873183 and 51673164) the National Key R&D Program of China(grant no.2016YFB0401004). 

主　　题：fluorescent organic light-emitting diodes phosphorescent organic light-emitting diodes thermally activated delayed fluorescence device degradation operational lifetime molecular dissociation 

摘      要：An organic light-emitting diode(OLED)is required to exhibit long-time operation without degradation as an inorganic LED.Sufficiently long operation time has been demonstrated for green-and red-emitting OLEDs.However,a blue device that is important for full-color display and lighting exhibits a much shorter operational lifetime than the other color devices.The short lifetime is mainly attributed to the molecular dissociation and the defects and radical species formation through various unimolecular and bimolecular processes,including direct photolysis,exciton–exciton interaction,and exciton–polaron interaction,and so on.