Up/down conversion luminescence and charge compensation investigation of Ca0.5Y1-x(WO4)2:xLn(3+) (Ln=Pr, Sm, Eu, Tb, Dy, Yb/Er) phosphors.
Up/down conversion luminescence and charge compensation investigation of Ca0.5Y1-x(WO4)2:xLn(3+) (Ln=Pr, Sm, Eu, Tb, Dy, Yb/Er) phosphors.
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DOI：
10.1016/j.saa.2015.06.129
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
V. Mahalingam;J. Thirumalai;R. Krishnan;Srinivas Mantha
中科院分区：
文献类型：
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作者：
V. Mahalingam;J. Thirumalai;R. Krishnan;Srinivas Mantha
采用固相反应法制备了Ca0.5Y(1−x)(WO4)2:xLn3+(Ln = Pr, Sm, Eu, Tb, Dy, Yb/Er)荧光粉的微观结构。用x射线衍射、扫描电镜和光致发光对制备的荧光粉样品进行了表征。结果表明，荧光粉样品具有fi41 /a四方对称的单相白钨矿结构。Ca0.5Y(1−x)(WO4)2:xLn3+(Ln = Pr, Sm, Eu, Tb, Dy, Yb/Er)荧光粉的下/上转换光致发光特性显示出特有的可见光发射。详细讨论了能量传递过程、荧光寿命和颜色坐标。此外，与碱氯化物共掺杂的荧光粉Ca0.5Y(1−x)(WO4)2:xPr3+显示出与氯化钠共掺杂的粉末荧光粉相同的发光增强现象。光度特性表明无机粉末荧光粉适合于固态照明和显示应用。
Microstructures of Ca0.5Y(1−x)(WO4)2:xLn3+(Ln = Pr, Sm, Eu, Tb, Dy, Yb/Er) phosphors were prepared via the solid-state reaction method. X-ray diffraction, scanning electron microscopy and photoluminescence were used to characterize the prepared phosphor samples. The results reveal that the phosphor samples have single phase scheelite structures with tetragonal symmetry ofI41/a. The down/up conversion photoluminescence of the Ca0.5Y(1−x)(WO4)2:xLn3+(Ln = Pr, Sm, Eu, Tb, Dy, Yb/Er) phosphors properties reveal characteristic visible emissions. The energy transfer process, fluorescence lifetime and color coordinates are discussed in detail. Furthermore, the phosphor Ca0.5Y(1−x)(WO4)2:xPr3+co-doped with alkali chlorides shows the enhancement of luminescence, which was found in the sodium chloride co-doped powder phosphor. The photometric characteristics indicate the suitability of the inorganic powder phosphors for solid-state lighting and display applications.