题目：

High Efficiency and Low Driving Voltage Blue/White Electrophosphorescence Enabled by the Synergistic Combination of Singlet and Triplet Energy of Bicarbazole Derivatives

作者：

Yue-Min Xie, Lin-Song Cui, Feng-Shuo Zu, Femi Igbari, Miao-Miao Xue, Zuo-Quan Jiang, Liang-Sheng Liao^*

单位：

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 , PR China

摘要：

New host materials (BCz�DBT and BCz�DBF) are synthesized by regrouped 3,3-bicarbazole (BCz) and dibenzothiophene (DBT)/dibenzofuran (DBF). Their thermal, electrochemical, electronic absorption and photoluminescent properties are also carefully investigated. The materials exhibit high glass transition temperatures (Tg) of 134 ℃ and 139 ℃, respectively. This kind of molecular design can effectively achieve high triplet energies and suitable highest occupied molecular orbital and lowest unoccupied molecular orbital (HOMO/LUMO) energy levels. High external quantum efficiencies (EQE) of sky blue (EQE = 25%) and three-color white (EQE = 21.4%) phosphorescent OLEDs have been achieved by using BCz�DBF as the host material.

影响因子：

3.827

分区情况：

2区

链接：

http://www.sciencedirect.com.sci-hub.org/science/article/pii/S1566119915300392