Izumi Saika, Govindharaj Prasannamani, Drewniak Anna, Crocomo Paola Zimmermann, Minakata Satoshi, de Sousa Leonardo Evaristo, de Silva Piotr, Data Przemyslaw, Takeda Youhei
Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 5650871, Japan.
Faculty of Chemistry, Silesian University of Technology, Strzody 9, 44-100 Gliwice, Poland.
Beilstein J Org Chem. 2022 Apr 25;18:459-468. doi: 10.3762/bjoc.18.48. eCollection 2022.
A new thermally activated delayed fluorescence (TADF) compound based on a donor-acceptor (D-A) architecture (D = phenoxazine; A = dibenzo[]phenazine) has been developed, and its photophysical properties were characterized. The D-A compound is applicable as an emitting material for efficient organic light-emitting diodes (OLEDs), and its external quantum efficiency (EQE) exceeds the theoretical maximum of those with prompt fluorescent emitters. Most importantly, comparative study of the D-A molecule and its D-A-D counterpart from the viewpoints of the experiments and theoretical calculations revealed the effect of the number of the electron donor on the thermally activated delayed fluorescent behavior.
一种基于供体-受体（D-A）结构（D = 吩恶嗪；A = 二苯并[]吩嗪）的新型热激活延迟荧光（TADF）化合物已被研发出来，并对其光物理性质进行了表征。该D-A化合物可用作高效有机发光二极管（OLED）的发光材料，其外量子效率（EQE）超过了具有即时荧光发射体的OLED的理论最大值。最重要的是，从实验和理论计算的角度对D-A分子及其D-A-D类似物进行的比较研究揭示了电子供体数量对热激活延迟荧光行为的影响。
