激基复合物和磷光超薄层相结合的高效率非掺杂白光有机发光二极管  

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

作　　者：王超[1] 李向峰 刘泽美 赵波 WANG Chao;LI Xiang-feng;LIU Ze-mei;ZHAO Bo(Huawei Technologies Co., Ltd., Shenzhen 518129, China;Chengdu CEC Panda Display Technology Co., Ltd., Chengdu 610200, China;Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]华为技术有限公司,广东深圳518129 [2]成都中电熊猫显示科技有限公司,四川成都610200 [3]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024

出　　处：《发光学报》2022年第1期85-93,共9页Chinese Journal of Luminescence

基　　金：山西省基础研究计划(20210302123113);国家自然科学基金(62074109,61775155,61605137);山西省高等学校科技创新项目(2020104)资助。

摘　　要：将蓝光激基复合物mCP∶PO-T2T和磷光超薄层结合,分别制备了基于Ir(pq)_(2)acac(~0.5 nm)/mCP∶PO-T2T/Ir(pq)_(2)acac(~0.5 nm)结构的双色互补色和基于Ir(ppy)_(3)(~0.5 nm)/mCP∶PO-T2T/Ir(pq)_(2)acac(~0.5 nm)结构的三基色非掺杂白光有机发光二极管(White organic light emitting diodes,WOLED),以探索超薄层在激基复合物中的应用。所制备的双色互补色WOLED,其最大电流效率、功率效率和外量子效率分别为46.1 cd/A、43.9 lm/W和22.2%,而三基色WOLED所实现的最大电流效率、功率效率和外量子效率分别为66.8 cd/A、63.5 lm/W和24.2%。研究分析表明,从高能的蓝光激基复合物发光层向两侧低能的红光和绿光磷光超薄层有效的能量传递是实现非掺杂WOLED高效率的原因。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)_(2)acac(~0.5 nm)/mCP∶PO-T2T/Ir(pq)_(2)acac(~0.5 nm)and red-green-blue(RGB)color structure of Ir(ppy)_(3)(~0.5 nm)/mCP∶PO-T2T/Ir(pq)_(2)acac(~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.

关 键 词：白光有机发光二极管 激基复合物 超薄层 非掺杂 

分 类 号：TN312.8[电子电信—物理电子学]