Click" synthesis of a bipolar dendrimer as a host material for electrophosphorescent devices"

被引：12
作者：
Yang J. [1 ]
Ye T. [2 ]
Zhang Q. [1 ]
Ma D. [2 ]
机构：
[1] School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240
[2] State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun
来源：
Macromolecular Chemistry and Physics | 2010年 / 211卷 / 18期
关键词：
Click chemistry; Convergent orthogonal strategy; Dendrimers; Electrophosphorescence; Light-emitting diodes;
D O I：
10.1002/macp.201000197
中图分类号：
学科分类号：
摘要：
A new solution-processable bipolar dendrimer with carbazole units as hole-transporting units and oxadiazole units as electron-transporting units was efficiently synthesized based on a convergent approach by alternation of a Cu-catalyzed azide/alkyne cycloaddition reaction and Williamson ether synthesis. The orthogonal chemistry completely avoided protection and activation of the focal points in the process of dendrimer synthesis. The dendrimer showed a wide bandgap and good thermal stability. Electrophosphorescent devices with the configuration ITO/PEDOT:PSS/bipolar dendrimer: Ir(ppy)3/TPBI/LiF/Al were fabricated. The devices showed a maximum current efficiency of 16.8 cd .A -1, a maximum power efficiency of 4.22 lm .W-1 and an external quantum efficiency of 5.7%. 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
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页码：1969 / 1976
页数：7
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