CRCU

Chemical Research in Chinese Universities ›› 2006, Vol. 22 ›› Issue (5): 647-650.doi:

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Synthesis and Characteristics of Holetransporting Materials Based on Biphenyl Diamine Derivatives with Carbazole Groups

ZHANG Qian1, CHEN Jiang-shan2, CHENG Yan-xiang2, WANG Li-xiang2, MA Dong-ge2, JING Xia-bin2 and WANG Fo-song2
   

    1. Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China;
    2. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:2005-10-24 Revised:1900-01-01 Online:2006-09-25 Published:2006-09-25
  • Contact: ZHANG Qian E-mail:zhangq651@nenu.edu.cn

Abstract: Two hole-transporting materials containing carbazole moieties with TPD- and NPB-like structures, 4,4'-bis[N-(4-carbazolylphenyl)-N-phenylamino]biphenyl(CPB) and 4,4'-bis[N-(4-carbazolylphenyl)-N-(1-naphthyl)amino]biphenyl(CNB), were synthesized via a modified Ullmann reaction. The resulting compounds were thermally stable with high glass transition temperatures ranging from 145 to 147 ℃ and possessed a good electrochemical reversibility and hole-transporting properties. Typical double-layer device evaluation with the structure ITO/CPB(40 nm)/Alq3(60 nm)/LiF/Al demonstrated that they were promising hole-transporting materials with a current efficiency of 5.25 cd/A and a power efficiency of 2.00 lm/W.

Key words: Electroluminescence, Hole-transporting property, Glass transition temperature