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Synthesis and luminescence of Sr2Ta2O7:Pr3+: a novel blue emission, long persistent phosphor

Published online by Cambridge University Press:  03 November 2016

Feihong Xue
Affiliation:
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
Yihua Hu*
Affiliation:
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
Li Chen
Affiliation:
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
Guifang Ju
Affiliation:
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
Qi Zhang
Affiliation:
School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

In this paper, a novel afterglow phosphor based on praseodymium ion doped Sr2Ta2O7 was synthesized successfully by solid-state reaction in the ambient atmosphere. The photoluminescence, afterglow, afterglow decay, and thermoluminescence (TL) properties were investigated in detail. The dependence of photoluminescence properties and long afterglow (LAG) performances on Pr3+ contents were investigated systematically. The optimal concentrations of Pr3+ ions for the best photoluminescence and LAG properties were experimentally to be 2 mol% and 0.5 mol%, respectively. Pr3+ exhibits prominent red emission in most reports, which derives from the 1D23H4 transition. However, the predominant blue emission locating at ∼489 and ∼507 nm coming from 3P0,13H4 transitions were observed in praseodymium ion-doped Sr2Ta2O7. Based on TL measurements, the trapping and de-trapping processes of charge carriers between shallower and deep traps were illustrated. A model was proposed on the basis of experimental results to explain the mechanisms of photoluminescence and LAG.

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Articles
Copyright
Copyright © Materials Research Society 2016 

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References

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