Issue 3, 2012
From the journal:

Journal of Materials Chemistry

A diarylborane-substituted carbazole as a universal bipolar host material for highly efficient electrophosphorescence devices†

Ming-Shiang Lin,a   Liang-Chen Chi,b   Hong-Wei Chang,a   Yi-Hsiang Huang,a   Kun-Cheng Tien,a   Chung-Chia Chen,a   Chih-Hao Chang,a   Chung-Chih Wu,*a   Atul Chaskar,b   Shu-Hua Chou,b   Hao-Chun Ting,b   Ken-Tsung Wong,*b   Yi-Hong Liub  and  Yun Chic  

* Corresponding authors

a Department of Electrical Engineering, Graduate Institute of Photonics and Optoelectronics, Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan
E-mail: chungwu@cc.ee.ntu.edu.tw

b Department of Chemistry, National Taiwan University, Taipei, Taiwan
E-mail: kenwong@ntu.edu.tw

c Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan

Abstract

Recently bipolar phosphorescent host materials have attracted wide attention since they can achieve better charge balance and hence better device performance. In this work, we report the synthesis and physical properties of a novel bipolar host material containing the dimesityl borane/carbazole hybrid, CMesB. With a high triplet energy, CMesB is considered a promising universal host material and has been applied to phosphorescent OLEDs of various colors. Red/green/blue/white (RGBW) OLEDs based on CMesB all show high external quantum efficiencies (20.7% for red, 20.0% for green, 16.5% for blue, and 15.7% for white) at practical brightnesses. The results indicate that the bipolar host CMesB with high triplet energy has high potential in manufacturing RGBW OLEDs for display or lighting applications.

Graphical abstract: A diarylborane-substituted carbazole as a universal bipolar host material for highly efficient electrophosphorescence devices

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Article information

DOI
https://doi.org/10.1039/C1JM13323C
Article type
Paper
Submitted
15 Jul 2011
Accepted
30 Sep 2011
First published
11 Nov 2011

J. Mater. Chem., 2012,22, 870-876

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A diarylborane-substituted carbazole as a universal bipolar host material for highly efficient electrophosphorescence devices

M. Lin, L. Chi, H. Chang, Y. Huang, K. Tien, C. Chen, C. Chang, C. Wu, A. Chaskar, S. Chou, H. Ting, K. Wong, Y. Liu and Y. Chi, J. Mater. Chem., 2012, 22, 870 DOI: 10.1039/C1JM13323C

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