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

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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 1D2 → 3H4 transition. However, the predominant blue emission locating at ∼489 and ∼507 nm coming from 3P0,1 → 3H4 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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ACKNOWLEDGMENT

The authors acknowledge the financial support from the National Natural Science Foundation of China (No. 21471038).

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, People’s Republic of China

    Feihong Xue, Yihua Hu, Li Chen, Guifang Ju & Qi Zhang

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  1. Feihong Xue
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Correspondence to Yihua Hu.

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Xue, F., Hu, Y., Chen, L. et al. Synthesis and luminescence of Sr2Ta2O7:Pr3+: a novel blue emission, long persistent phosphor. Journal of Materials Research 31, 3704–3711 (2016). https://doi.org/10.1557/jmr.2016.401

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