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Influence of Annealing Process on the Photostimulated Luminescence Properties of CsBr:Eu2+

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Author(s): MENG Jia, ZHAO Li-Li, WU Jie-Hua, SONG Li-Xin

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 25;
Issue: 9;
Start page: 952;
Date: 2010;
Original page

Keywords: CsBr:Eu2+ | photostimulated luminescence | anneal | electron/hole trap center

ABSTRACT
CsBr:Eu2+ powders were prepared by solid-state reaction. The photostimulated luminescence (PSL) spectra, the differential absorption spectra (DAS) and PSL lifetime spectra were systematically investigated. The results reveal the annealing process can increase the PSL intensity and decrease the PSL lifetime. The relationship between the annealing atmosphere and PSL properties were discussed in detail, and the results reveal that substitutional oxygen ions Os- (S: substitute, O- substitute for Br-) and interstitial hydrogen atoms Hi0 are formed in the annealing process. All of Os-, Hi0 and H2i0 are electron trap centers, which are closely related to the formation of hole traps centers.

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