题目：

Donor−σ�Acceptor Molecules for Green Thermally Activated Delayed Fluorescence by Spatially Approaching Spiro Conformation

作者：

Ya-Kun Wang, Sheng-Fan Wu, Yi Yuan, Si-Hua Li,  Man-Keung Fung, Liang-Sheng Liao^* and Zuo-Quan Jiang^*

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nanoscience and Technology, Soochow University, 199 Ren-Ai Road, Suzhou 215123, China.

摘要：

By separating donor/acceptor with a σ linker while keeping them in contact through space interactions, new oxygen-bridged triphenylamine/fluorene-based donor−σ�acceptor (D−σ�A) type thermally activated delayed fluorescence (TADF) emitters are developed. X-ray structural analyses and time-dependent density functional theory reveal that tilted configuration of spiro skeleton, extended delocalization of the highest occupied molecular orbital (HOMO), and lowest triplet state of charge transfer property (³CT) play key roles in the TADF mechanism. OLEDs fabricated with these D−σ�A emitters achieved good external quantum efficiency of 20.4% and long operating durability of 18000 h at 100 cd m^�2.

影响因子：

6.579

分区情况：

一区

链接：

http://pubs.acs.org/doi/abs/10.1021/acs.orglett.7b01281