题目：

Aminoborane-based Bipolar Host Material for Blue and White-Emitting Electrophosphorescence Devices

作者：

Qi Sun, Lin-Song Cui, Yue-Min Xie, Jiao-Jiao Liang, Zuo-quan Jiang, Liang-sheng Liao**, Man-Keung Fung*

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, China

摘要：

A novel aminoborane-based host material, 9-(dimesitylboryl)-90-phenyl-9H, 90H-3,30-bicarbazole (BCzBMes) was developed for blue and white phosphorescent OLEDs (PHOLEDs). The thermal, photophysical and electrochemical properties were systematically investigated. BCzBMes not only has a high triplet energy but also shows a bipolar behavior. To validate the superior properties of BCzBMes, blue and white PHOLEDs were fabricated using BCzBMes as a bipolar host material. A blue PHOLED containing Bis(4,6-difluorophenylpyridinato-N,C2)picolinatoiridium (FIrPic) as a dopant exhibited excellent performance with a maximum external quantum efficiency (EQE) of 16.7%. In particular, the blue PHOLED exhibited an extraordinary low efficiency roll-off of 10.1% at a brightness of 5000 cd/m2. Meanwhile, an all-phosphor near-white device hosted by BCzBMes was also fabricated, and a high EQE of 18.8% was achieved. This excellent performance suggests that BCzBMes is a potential bipolar host material for the PHOLEDs.

影响因子：

3.399

分区情况：

2区

链接：

http://www.sciencedirect.com/science/article/pii/S1566119917302318