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Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence

Yang, Z.; Mao, Z.; Zhang, X.; Ou, D.; Mu, Y.; Zhang, Y.; Zhao, C.; Liu, S.; Chi, Z.; Xu, J.; Wu, Y-C.; Lu, P-Y.; Lien, A.; Bryce, M.R.

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Authors

Z. Yang

Z. Mao

X. Zhang

D. Ou

Y. Mu

Y. Zhang

C. Zhao

S. Liu

Z. Chi

J. Xu

Y-C. Wu

P-Y. Lu

A. Lien



Abstract

Although persistent room-temperature phosphorescence (RTP) emission has been observed for a few pure crystalline organic molecules, there is no consistent mechanism and no universal design strategy for organic persistent RTP (pRTP) materials. A new mechanism for pRTP is presented, based on combining the advantages of different excited-state configurations in coupled intermolecular units, which may be applicable to a wide range of organic molecules. By following this mechanism, we have developed a successful design strategy to obtain bright pRTP by utilizing a heavy halogen atom to further increase the intersystem crossing rate of the coupled units. RTP with a remarkably long lifetime of 0.28 s and a very high quantum efficiency of 5 % was thus obtained under ambient conditions. This strategy represents an important step in the understanding of organic pRTP emission.

Citation

Yang, Z., Mao, Z., Zhang, X., Ou, D., Mu, Y., Zhang, Y., …Bryce, M. (2016). Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence. Angewandte Chemie International Edition, 55(6), 2181-2185. https://doi.org/10.1002/anie.201509224

Journal Article Type Article
Acceptance Date Oct 2, 2015
Online Publication Date Jan 6, 2016
Publication Date Feb 5, 2016
Deposit Date Feb 1, 2016
Publicly Available Date Mar 28, 2024
Journal Angewandte Chemie International Edition
Print ISSN 1433-7851
Electronic ISSN 1521-3773
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 55
Issue 6
Pages 2181-2185
DOI https://doi.org/10.1002/anie.201509224
Keywords Intersystem crossing, Organic materials, Phosphorescence, Photochemistry, Spin–orbit coupling.

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Copyright Statement
This is the peer reviewed version of the following article: Yang, Z., Mao, Z., Zhang, X., Ou, D., Mu, Y., Zhang, Y., Zhao, C., Liu, S., Chi, Z., Xu, J., Wu, Y.-C., Lu, P.-Y., Lien, A. and Bryce, M. R. (2016), Intermolecular Electronic Coupling of Organic Units for Efficient Persistent Room-Temperature Phosphorescence. Angewandte Chemie International Edition, Article first published online: 6 JAN 2016, which has been published in final form at http://dx.doi.org/10.1002/anie.201509224. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving.





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