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 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

出　　处：《Science China Chemistry》2016年第12期1593-1599,共7页中国科学（化学英文版）

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

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.On the basis of different generation carbazole dendrons, a series of self-host yellow Ir dendrimers(Y-G0, Y-G1 and Y-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 performance,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.

关 键 词：IRIDIUM DENDRIMERS CARBAZOLE self-host solution-processed OLEDs 

分 类 号：O633.5[理学—高分子化学] TN383.1[理学—化学]