基于双发光层结构低效率滚降的暖白光有机发光器件制备研究  

Warm white organic light-emitting diode with low efficiency roll-off based on dual-emitting layer

作　　者：单美玲 钱坤 华杰[2] 程泽远 汪津[2] Shan Meiling;Qian Kun;Hua Jie;Cheng Zeyuan;Wang Jin(Jilin Engineering Vocational College,Siping 136001;Key Laboratory of Functional Materials Physics and Chemistry of Ministry of Education,College of Information Technology,Jilin Normal University,Siping 136000)

机构地区：[1]吉林工程职业学院,四平136001 [2]吉林师范大学信息技术学院,功能材料物理与化学教育部重点实验室,四平136000

出　　处：《化工新型材料》2021年第12期127-132,共6页New Chemical Materials

基　　金：国家自然科学基金(11774134)。

摘　　要：设计合理的发光层主客体掺杂结构是获得高效率磷光白色有机发光器件(WOLEDs)的必要条件。将橙色磷光染料PO-01和蓝色磷光染料FIrPic分别掺入空穴传输材料mCP和电子传输材料TmPyPB中,制备了低效率滚降、发光颜色稳定的双发光层结构暖白光器件。通过器件结构的优化设计,促进了载流子注入平衡,使激子分布在较宽区域,呈现较低的发光效率滚降。器件的最大电流效率为17.8cd/A,当发光亮度为1000cd/m^(2)时,电流效率滚降仅为5.6%。当发光亮度从22.4cd/m^(2)增至7293cd/m^(2),相应的发光色坐标从(0.406,0.464)变化至(0.405,0.458),变化量ΔCIE仅为(0.005,0.004)。White organic light-emitting diodes(WOLEDs)are one of the most promising candidates for solid-state lighting sources and displays due to their inherent merits of high efficiency,flexibility,light weight and fast response time.With the development of organic materials and device structures,the performance of WOLEDs has been gradually enhanced to satisfy the demand of real commercialization.The strategic design of device structures was applied to simultaneously realize the superior color stability,high efficiency,and low efficiency roll-off properties of phosphorescent WOLEDs.The optimized WOLED emited the forward-viewing maximum current efficiency(CE)of 17.8 cd/A,and the CE still remain 16.8 cd/A at 1000 cd/m^(2),exhibiting extremely low efficiency roll-off.Furthermore,the devices also shown extremely stable CIE coordinate varying range of(0.005,0.004)from 22.4 to 7293 cd/m^(2).The good performances indicated the validity of the structure design and provided an effective way for the development of high-performance WOLEDs.

关 键 词：有机电致发光器件 暖白光 效率滚降 颜色稳定 磷光 

分 类 号：O64[理学—物理化学]