Z. Yang
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.
Authors
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
Professor Martin Bryce m.r.bryce@durham.ac.uk
Professor
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.
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 | Jan 6, 2017 |
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. |
Public URL | https://durham-repository.worktribe.com/output/1393448 |
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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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