
1.Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University, Baoding, 071002, China
2.California NanoSystems Institute, University of California, Los Angeles, CA, 90095, USA
3.State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310058, China
Yanmin Yang (yangym@hbu.edu.cn)
Jianrong Qiu (qjr@zju.edu.cn)
Published:31 March 2022,
Published Online:08 March 2022,
Received:19 December 2021,
Revised:28 January 2022,
Accepted:11 February 2022
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Li, L. P et al. Mechanism of the trivalent lanthanides' persistent luminescence in wide bandgap materials. Light: Science & Applications, 11, 375-382 (2022).
Li, L. P et al. Mechanism of the trivalent lanthanides' persistent luminescence in wide bandgap materials. Light: Science & Applications, 11, 375-382 (2022). DOI: 10.1038/s41377-022-00736-5.
The trivalent lanthanides have been broadly utilized as emitting centers in persistent luminescence (PersL) materials due to their wide emitting spectral range
which thus attract considerable attention over decades. However
the origin of the trivalent lanthanides' PersL is still an open question
hindering the development of excellent PersL phosphors and their broad applications. Here
the PersL of 12 kinds of the trivalent lanthanides with the exception of La
3+
Lu
3+
and Pm
3+
is reported
and a mechanism of the PersL of the trivalent lanthanides in wide bandgap hosts is proposed. According to the mechanism
the excitons in wide bandgap materials transfer their recombination energy to the trivalent lanthanides that bind the excitons
followed by the generation of PersL. During the PersL process
the trivalent lanthanides as isoelectronic traps bind excitons
and the binding ability is not only related to the inherent arrangement of the 4f electrons of the trivalent lanthanides
but also to the extrinsic ligand field including anion coordination and cation substitution. Our work is believed to be a guidance for designing high-performance PersL phosphors.
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