Cheng Zhang-Li, Zhang Ming, Yuan Yi, Wang Hui, Li Jie, Zhang Jing, Li Jia-Chen, Zhou Jie-Yu, Wang Jia-Shen, Liang Hong-Ze, Ye Jun, Wang Kai, Zhang Xiao-Hong
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, P. R. China.
Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China.
Org Lett. 2024 Jun 7;26(22):4716-4720. doi: 10.1021/acs.orglett.4c01493. Epub 2024 May 27.
To realize strong donor-acceptor face-to-face stacking for efficient through-space charge transfer-type thermally activated delayed fluorescence, a conceptually new design strategy is proposed to couple flexible bridges with adequate rigidity via built-in intramolecular hydrogen bonds (IHBs). The resulting emitter ACE-CN has a planarized benzyl methyl ether bridge self-anchored by the C-H···O IHB and shows a high photoluminescence quantum efficiency of 93%. The solution- and vacuum-processed devices exhibited high external quantum efficiencies of 11.8% and 24.7%, respectively.
