Investigation of reversible photoluminescence switching driven by colorless-purple photochromism in Sr5(PO4)3F:Eu2+ for optical storage applications
Investigation of reversible photoluminescence switching driven by colorless-purple photochromism in Sr5(PO4)3F:Eu2+ for optical storage applications
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研究用于光存储应用的 Sr5(PO4)3F:Eu2 中无色紫色光致变色驱动的可逆光致发光开关
DOI：
10.1016/j.jallcom.2018.04.271
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发表时间：
2018-07
期刊：
影响因子：
--
通讯作者：
胡义华
中科院分区：
文献类型：
--
作者：
吕洋;金亚洪;吴浩怡;王传龙;居桂芳;陈丽;胡义华
We report a novel photoresponsive powder material, haloapatite Sr5(PO4)3F:Eu2+, which exhibits good photochromic properties and undergoes reversible colorless-purple color changes after alternative UV and visible irradiation/heating. The effect of Eu2+doping concentration on the photochromic behavior is investigated, and the optimum doping concentration of Eu2+is found to be approximately 0.5 mol%. Further recycling coloring-bleaching measurements at room and high temperature confirm the high fatigue resistance of the material and the good thermal stability of its photochromic performance. Based on these findings, the photoluminescence performance of the present material can be effectively modulated through its photochromism. A luminescence switching efficiency of up to ∼40% is obtained for x = 0.005. The present results allow discussing the critical role of the charge carrier dynamics in the photochromism. Finally, we propose a tentative model illustrating the photochromism and luminescence modulation mechanisms.
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