Issue 65, 2015
From the journal:

Chemical Communications

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,a   Jia Hu,a   Xudong Cao,a   Fangfang Wang,a   Chao Zheng,b   Youtian Tao,*a   Xinwen Zhang*b  and  Wei Huang*ab  

* Corresponding authors

a 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, P. R. China
E-mail: iamyttao@njtech.edu.cn, iamwhuang@njtech.edu.cn

b Key Laboratory for Organic Electronics and Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210046, P. R. China
E-mail: iamxwzhang@njupt.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 ΔEST value for efficient RISC.

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

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Article information

DOI
https://doi.org/10.1039/C5CC04126K
Article type
Communication
Submitted
21 May 2015
Accepted
01 Jul 2015
First published
02 Jul 2015

Chem. Commun., 2015,51, 13024-13027

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

L. Mei, J. Hu, X. Cao, F. Wang, C. Zheng, Y. Tao, X. Zhang and W. Huang, Chem. Commun., 2015, 51, 13024 DOI: 10.1039/C5CC04126K

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