Please use this identifier to cite or link to this item:
Title: High-temperature long persistent and photo-stimulated luminescence in Tb3+ doped gallate phosphor
Authors: Yu, X
Wang, S
Zhu, Y
Liang, J
Qiu, J
Xu, X
Lu, W
Keywords: Defects
Long persistent luminescence
Photo-stimulated luminescence
Thermal stability
Issue Date: 2017
Publisher: Elsevier
Source: Journal of alloys and compounds, 2017, v. 701, p. 774-779 How to cite?
Journal: Journal of alloys and compounds 
Abstract: The formation of suitable defects levels is crucial to the optical performance of the electron trapping materials which provide a wide range of applications from the initial civil uses to life sciences, energy and environmental engineering. SrGa2O4, possessing a one-dimensional chain structure of cations along a crystal direction, exhibits a self-activated blue long persistent luminescence (LPL) related to the intrinsic defects. Different trap depths are generated forming a successive defect structure in this three-dimensional framework of SrGa2O4 containing channels occupied by Sr2+ when Tb3+ ions are introduced. The captured carriers in shallow traps are spontaneously released at room temperature and recombine in the luminescence center of Tb3+, eventually causing characteristic emission of Tb3+. The deeper traps are critically important to prevent the thermal fading of carriers at room temperature, therefore, LPL is achieved in SrGa2O4:Tb3+ phosphor at 328 K. Furthermore, a photo-stimulated luminescence (PSL) originated from Tb3+ ions is realized in SrGa2O4:Tb3+ phosphor induced by 980 nm laser diode with the releasing of the carriers trapped in the deeper traps at room temperature. Our results infer that the existence of a successive defect structure with multiple traps for the incorporation of the shallow and deep ones is conducive to the thermal stability of SrGa2O4:Tb3+ phosphor, which could provide a potential application in a rigorous environment with a higher thermal energy than the room temperature, such as solar energy utilization, and in vivo-imaging.
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2017.01.210
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Feb 20, 2019


Last Week
Last month
Citations as of Feb 19, 2019

Page view(s)

Last Week
Last month
Citations as of Feb 18, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.