【摘 要】
：
A novel up-converting phosphor,NaxAlyFx+3y/CaF2 (0.3 ＜ x ＜ 0.5,0 ＜ y ＜ 0.1) composite,is prepared by a hydrothermal process at 180 ℃ and an annealing treatment at
【机 构】
：
School of Chemical Engineering,Department of Physics
【基金项目】
：
Northwest University Graduate Cross-discipline Funds;the Research Fund for the Doctoral Program of Higher Education;国家自然科学基金
论文部分内容阅读
A novel up-converting phosphor,NaxAlyFx+3y/CaF2 (0.3 ＜ x ＜ 0.5,0 ＜ y ＜ 0.1) composite,is prepared by a hydrothermal process at 180 ℃ and an annealing treatment at 500 ℃.X-ray diffraction (XRD) pattern indicates that NaxAlyFx+3y/CaF2 is a composite consisting of NaF,Na3AlF6,and CaF2.The up-conversion luminescence properties of this phosphor are investigated by fluorescence spectrometer.Results show that NaxAlyFx+3y/CaF2 exhibits visible-to-ultraviolet up-conversion luminescence properties.The emission peaks at 316 and 336 nm are observed when excited by 610 nm,the luminescence lifetime of the emissions is great than 18 ms,and the internal fluorescence quantum yield is 4.2％.Additionally,the luminescent mechanism of this phosphor is also mentioned.
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