Self-host yellow iridium dendrimers based on carbazole dendrons: synthesis, characterization and application in solution-processed organic light-emitting diodes

作     者：Bin Wang Shiyang Shao Junqiao Ding Lixiang Wang Xiabin Jing Fosong Wang 

作者机构：State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2016年第59卷第12期

页      面：1593-1599页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：supported by the National Natural Science Foundation of China(51573183,21204084,51203149,51573182) the National Basic Research Program of China(2015CB655000) 

主　　题：iridium dendrimers carbazole self-host solution-processed OLEDs 

摘      要：On the basis of different generation carbazole dendrons, a series of self-host yellow Ir dendrimers （Y-G0, Y-G1 and-G2） have been successfully synthesized and characterized in detail. It is found that the peripheral dendrons can effectively reduce the intermolecular interactions between emissive Ir cores, as verified by the increased photoluminescence quantum yields and film lifetimes. Among these dendrimers, Y-G2 bearing the second generation dendrons shows the best non-doped device per- formance, revealing a peak luminous efficiency of 20.2 cd/A. The value is nearly twice that of Y-G0 without any dendrons, which could be further improved to 32.1 cd/A by dispersing Y-G2 into a host matrix. We believe that this work will shed light on the development of highly efficient yellow phosphorescent dendrimers with a self-host strategy.