Ling Mei1, Jia Hu, Xudong Cao, Fangfang Wang, Chao Zheng, Youtian Tao, Xinwen Zhang, Wei Huang. 1. Key Lab for Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China. iamyttao@njtech.edu.cn iamwhuang@njtech.edu.cn.
Abstract
The non-conjugated inductive effect of trifluoromethyl (CF3) was found to be a new acceptor instead of other conjugated moieties. Two blue emissive compounds, 4CzCF3Ph and 5CzCF3Ph, were synthesized using a simple catalyst-free C-N coupling reaction. Solution-processed TADF devices based on the 5CzCF3Ph dopant exhibit significantly higher efficiency (11.8 cd A(-1), 5.2%) than 4CzCF3Ph (1.03 cd A(-1), 0.67%) due to the smaller ΔE(ST) value for efficient RISC.
The non-conjugated inductive effect of trifluoromethyl (n class="Chemical">CF3) was found to be a new acceptor instead of other conjugated moieties. Two blue emissive compounds, 4CzCF3Ph and 5CzCF3Ph, were synthesized using a simple catalyst-free C-N coupling reaction. Solution-processed TADF devices based on the 5CzCF3Ph dopant exhibit significantly higher efficiency (11.8 cd A(-1), 5.2%) than 4CzCF3Ph (1.03 cd A(-1), 0.67%) due to the smaller ΔE(ST) value for efficient RISC.
Authors: Inaiá O Rocha; Yuri G Kappenberg; Wilian C Rosa; Clarissa P Frizzo; Nilo Zanatta; Marcos A P Martins; Isadora Tisoco; Bernardo A Iglesias; Helio G Bonacorso Journal: Beilstein J Org Chem Date: 2021-12-01 Impact factor: 2.883