Solution-Processed, Undoped, Deep-Blue Organic Light-Emitting Diodes Based on Starburst Oligofluorenes with a Planar Triphenylamine Core

被引：72
作者：
Liu, Cui [1 ]
Li, Yanhu [2 ]
Zhang, Yingyue [1 ]
Yang, Chuluo [1 ]
Wu, Hongbin [2 ]
Qin, Jingui [1 ]
Cao, Yong [2 ]
机构：
[1] Wuhan Univ, Dept Chem, Hubei Key Lab Organ & Polymer Optoelect Mat, Wuhan 430072, Peoples R China
[2] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
来源：
CHEMISTRY-A EUROPEAN JOURNAL | 2012年 / 18卷 / 22期
基金：
中国国家自然科学基金;
关键词：
conjugation; cross-coupling; fluorescence; OLEDs; oligomers; HIGHLY EFFICIENT; DEVICES; ELECTROLUMINESCENCE; EMISSION; ARCHITECTURES; CARRIER; GREEN;
D O I：
10.1002/chem.201200062
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of starburst oligomers (T1T3) that contained a fully diarylmethene-bridged triphenylamine core and oligofluorene arms were designed and synthesized through Suzuki cross-coupling reactions. Their thermal, photophysical, and electrochemical properties were also investigated. These materials showed high glass transition, in the range of 123129?degrees C, and good film-forming abilities. They displayed deep-blue emission both in solution and as thin films. Solution-processed devices based on these oligomers exhibited highly efficient deep-blue electroluminescence and the device performances were significantly enhanced with the extension of the oligofluorene arms. The double-layered device that contained T3 as an emitter showed a maximum current efficiency of 3.83 cd?A-1 and a maximum external quantum efficiency of 4.19?% with CIE coordinates of (0.16, 0.09), which are among the highest values for undoped deep-blue OLEDs that are based on solution-processable starburst oligomers.
引用
收藏
页码：6928 / 6934
页数：7
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