The inductive-effect of electron withdrawing trifluoromethyl for thermally activated delayed fluorescence: Tunable emission from tetra- to penta-carbazole in solution processed blue OLEDs

Ling Mei, Jia Hu, Xudong Cao, Fangfang Wang, Chao Zheng, Youtian Tao, Xinwen Zhang, Wei Huang

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92 引用 (Scopus)

摘要

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 ΔEST value for efficient RISC.

源语言英语
页(从-至)13024-13027
页数4
期刊Chemical Communications
51
65
DOI
出版状态已出版 - 21 8月 2015

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