Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 858, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157719
Keywords
Ca5Ga6O14: Pr3+; X-ray; Long persistent luminescence; Trap
Categories
Funding
- National Natural Science Foundation of China [11804038, 11804007]
- Natural Science Foundation of Shaanxi Province of China [2020JQ-891, 2019JQ-424]
- Opening Foundation of Key Laboratory for Special Function Materials and Structural Design of the Ministry of the Education [lzujbky-2020-kb06]
- Baoji University of Arts and Sciences Key Research [ZK16071, ZK2018053, ZK2017033]
- Key Research and Development Plan of Shaanxi Province [2018ZDXMGY119]
- Key Scientific Research Plan of Shaanxi Provincial Department of Education [18JC001]
- Scientific and Technological Research Program of Chongqing Municipal Education Commission [KJQN202001325, KJQN201901349]
- Foundation of Chongqing University of Arts and Sciences [R2016DQ10]
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In this study, a new white-emitting long persistent luminescence phosphor Ca5Ga6O14: Pr3+ was synthesized and its exceptional long afterglow properties under UV and X-ray excitation were investigated. The phosphor can emit white light consisting of green-bluish and red ingredients for up to 10.3 hours after UV excitation is removed.
In the current study, we synthesized a new white-emitting long persistent luminescence (LPL) phosphor Ca5Ga6O14: Pr3+ by the solid-state reaction, and investigated its LPL properties for the first time. Ca5Ga6O14: Pr3+ is a multi-stimulus phosphor that can be activated by X-ray and 254 nm ultraviolet (UV) lamp. Under the excitation of 254 nm UV lamp and X-ray, Ca5Ga6O14: Pr3+ provides white light consisting of green-bluish and red ingredients. The phenomenon stems from P-3(0) and D-1(2) multiplets electrons transition in 4f level of Pr3+. Following the removal of UV excitation, a fantastic white luminescent LPL can be detected in Ca5Ga6O14: Pr3+ for 10.3 h. Moreover, the distribution of traps in Ca5Ga6O14: Pr(3+)was also discussed by thermoluminescence (TL) spectra, which contained large shallow and deep traps, that were critical for exceptional LPL properties for UV and X-ray irradiation, respectively. Our results indicated that Ca5Ga6O14: Pr3+ could be used as multi-stimulus LPL phosphors in different fields. (C) 2020 Elsevier B.V. All rights reserved.
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