基于激基复合物主体的高效率红光和白光有机发光二极管  

High Efficiency Red and White Organic Light Emitting Diodes based on Exciplex Host

作　　者：王超[1] 李向峰 刘泽美 赵波 WANG Chao;LI Xiangfeng;LIU Zemei;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,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,太原030024

出　　处：《太原理工大学学报》2022年第1期21-26,共6页Journal of Taiyuan University of Technology

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

摘　　要：将蓝光激基复合物mCP:PO-T2T作为主体材料应用在有机发光二极管中,通过对掺杂剂Ir(pq)_(2)acac浓度的优化,实现了激基复合物到掺杂剂完全的或不完全的能量传递,获得了高效率的单色红光和白光有机发光二极管。所得基于激基复合物主体的红光器件最高外量子效率为21%,相比于传统CBP单主体红光器件提高了44%;降低掺杂浓度,利用激基复合物主体和掺杂剂之间的不完全能量传递,实现激基复合物主体和掺杂剂的同时发光,获得了最高电流效率、功率效率和外量子效率分别为41.2 cd/A、43.1 lm/W和19.5%的白光有机发光二极管。研究表明,这种基于激基复合物主体的器件结构中无势垒的电荷注入、平衡的电荷传输和复合以及高的三重态激子利用率是器件高效率实现的原因。High efficiency monochrome red and white OLEDs were realized through the control of dopant concentration by employing the exciplex mCP:PO-T2T as host.The red OLED based on exciplex host achieved the maximum external quantum efficiency(EQE)of 21%,a 44%increase compared with traditional CBP single host.Further,the white OLED with maximum current efficiency,power efficiency and EQE of 41.2 cd/A,43.1 lm/W,and 19.5%,respectively,was obtained by decreasing the dopant concentration to achieve the simultaneous emission of exciplex host and dopant emitter.The results demonstrate that the barrier-free charge injection,balanced charge transport/recombination,and high triplet excition harvest are responsible for the high efficiency.

关 键 词：有机发光二极管 激基复合物 主体 白光 反向系间窜越 

分 类 号：TN383.1[电子电信—物理电子学]