Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 50, Pages 15589-15593Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201607653
Keywords
intersystem crossing; room-temperature phosphorescence; materials science; matrix isolation; white-light emission
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Funding
- National Natural Science Foundation of China [91333201]
- National Basic Research Program of China [2015CB65503]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB12020200]
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The design and preparation of metal-free organic materials that exhibit room-temperature phosphorescence (RTP) is a very attractive topic owing to potential applications in organic optoelectronic devices. Herein, we present a facile approach to efficient and long-lived organic RTP involving the doping of N-phenylnaphthalen-2-amine (PNA) or its derivatives into a crystalline 4,4'-dibromobiphenyl (DBBP) matrix. The resulting materials showed strong and persistent RTP emission with a quantum efficiency of approximately 20% and a lifetime of a few to more than 100 milliseconds. Bright white dual emission containing blue fluorescence and yellowishgreen RTP from the PNA-doped DBBP crystals was also confirmed by Commission Internationale de l' Eclairage (CIE) coordinates of (x = 0.29-0.31, y = 0.38-0.41).
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