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

作者：Lin Ming Shiang; Chi Liang Chen; Chang Hong Wei; Huang Yi Hsiang; Tien Kun Cheng; Chen Chung Chia; Chang Chih Hao; Wu Chung Chih^*; Chaskar Atul; Chou Shu Hua; Ting Hao Chun; Wong Ken Tsung; Liu Yi Hong; Chi Yun

来源：Journal of Materials Chemistry, 2012, 22(3): 870-876.

DOI：10.1039/c1jm13323c

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.

• 出版日期2012
• 单位中国科学院电工研究所; 清华大学