A novel long lasting phosphor Sr5 (PO4)3FxCll_x:Eu2+,Gd3+ prepared in air condition |
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基金项目: | Project supported by Cooperation Project in Industry, Education and Research of Guangdong Province and Ministry of Education of China (2012B09110044), and the Guangdong Provincial Natural Science Foundation of China (9151009001000052 ) |
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摘 要: | A series of blue long afterglow mixed halide-phosphate phosphors Sr5 (PO4)3 FxCll-x:Eu2+,Gd3+ were synthesized in air by traditional solid-state reaction routte. The crystal structures, photoluminescence, thermolurninescenee properties and afterglow proper- ties of the phosphors were characterized systematically using X-ray diffraction (XRD), luminescence spectrophotometer, microcom- puter thermoluminescence dosimeter and single photon counter, respectively. Under 280 nm excitation, the broadband emissions of Eu2+ ions were observed at 445 nm (blue) due to the 4f7→4f65d transition. It was demonstrated that there existed the self-reduction of the Eu3+ to Eu2+ ions in this special halide-phosphate matrix in air condition. The addition of Gd3+ ions obviously enhanced the after- glow properties of the single doped Eu2+ ions in the halide-phosphate phosphors. And the content of the fluoride anions also had sig- nificant influence on the afterglow properties. All results indicated that Srs (PO4)3 FxCI1-x:Eu2+,Gd3+ might be potential phosphors for long lasting phosphorescence (LLP) materials.
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关 键 词: | 钆离子 长余辉 SRS 荧光分光光度计 调制 卤磷酸盐 X-射线衍射 单光子计数器 |
收稿时间: | 23 April 2013 |
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