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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Influence of doping alkali metal ions on the structure and luminescent properties of microwave synthesized CaMoO4:Dy3+ phosphors
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Influence of doping alkali metal ions on the structure and luminescent properties of microwave synthesized CaMoO4:Dy3+ phosphors

机译：掺杂碱金属离子对微波合成CaMoO4：Dy3 +荧光粉结构和发光性能的影响

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摘要

A series of Ca0.98-xMoO4:Dy-0.02(3+), M-x(+) (M = Li, Na, K, 0 <= x <= 0.16) phosphors were synthesized rapidly using microwave radiation method in 30 min. The effects of doping alkali metal ions on the phase structure and luminescent properties of the phosphors were analyzed using X-ray powder diffraction, scanning electron microscopy, fourier transform infra-red spectroscopy, and fluorescence spectrophotometry. The results confirmed that all the samples were pure tetragonal CaMoO4 structure. The samples consisted of many cubic particles and some irregular polyhedron particles, assembled by fine spherical-like grains. The main emission peak was located at 574 nm, which was attributed to the F-4(9/2) -> H-6(13/2) transition of Dy3+. The addition of alkali metal ions could effectively improve the intensity of the main emission peak. K+ had better improvement on emission intensity than Na+ and Li+. For the series of Ca0.98-xMoO4:Dy-0.02(3+), K-x(+) phosphors, the optimum doping content of K+ was 0.10 with 2.6 times of the emission intensity at 574 nm of the undoped-K+ sample. The color coordinates gradually shifted from yellow-green region to the yellow region with the increasing of K+ content (0 <= x <= 0.10). When x = 0.10, the sample shows the strongest yellow-emitting. (C) 2016 Elsevier B.V. All rights reserved.
机译：使用微波辐射法在30分钟内快速合成了一系列Ca0.98-xMoO4：Dy-0.02（3+），M-x（+）（M = Li，Na，K，0 <= x <= 0.16）荧光粉。使用X射线粉末衍射，扫描电子显微镜，傅立叶变换红外光谱和荧光分光光度法分析了掺杂碱金属离子对磷光体的相结构和发光性能的影响。结果证实所有样品均为纯四方CaMoO4结构。样品由许多立方颗粒和一些不规则的多面体颗粒组成，这些颗粒由细小的球形颗粒组装而成。主要发射峰位于574 nm，这归因于Dy3 +的F-4（9/2）-> H-6（13/2）跃迁。碱金属离子的添加​​可以有效地改善主发射峰的强度。钾离子在发射强度上的改善优于钠离子和锂离子。对于Ca0.98-xMoO4：Dy-0.02（3 +），K-x（+）系列荧光粉，K +的最佳掺杂含量为0.10，是未掺杂K +样品在574 nm处发射强度的2.6倍。随着K +含量的增加（0 <= x <= 0.10），颜色坐标从黄绿色区域逐渐移到黄色区域。当x = 0.10时，样品显示出最强的发黄光。 （C）2016 Elsevier B.V.保留所有权利。

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