Journal
CHEMICAL COMMUNICATIONS
Volume 51, Issue 65, Pages 13024-13027Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cc04126k
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Funding
- National Natural Science Foundation of China [61474062, 61204048]
- NSF of Jiangshu Province [BK20130919]
- Foundation for the Author of National Excellent Doctoral Dissertation of China FANEDD [201436]
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The non-conjugated inductive effect of trifluoromethyl (CF3) was found to be a new acceptor instead of other conjugated moieties. Two blue emissive compounds, 4CzCF(3)Ph and 5CzCF(3)Ph, were synthesized using a simple catalyst-free C-N coupling reaction. Solution-processed TADF devices based on the 5CzCF(3)Ph dopant exhibit significantly higher efficiency (11.8 cd A(-1), 5.2%) than 4CzCF(3)Ph (1.03 cd A(-1), 0.67%) due to the smaller Delta E-ST value for efficient RISC.
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