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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 >Reddish orange long afterglow phosphor Ca_2SnO_4:Sm~(3+) prepared by sol-gel method
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Reddish orange long afterglow phosphor Ca_2SnO_4:Sm~(3+) prepared by sol-gel method

机译：溶胶-凝胶法制备的红橙色长余辉荧光粉Ca_2SnO_4：Sm〜（3+）

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摘要

A reddish orange light emissive long afterglow phosphor, Ca_2SnO_4:Sm~(3+) was prepared by sol-gel method at lower temperature. The synthesized phosphors were characterized by X-ray diffraction, scanning electron micrograph images, photoluminescence spectra, afterglow decay curves and thermoluminescence spectra. Three emission peaks locate at 565 nm, 609 nm and 655 nm corresponding to CIE chromaticity coordinates of x = 0.53 and y = 0.47, which indicates the reddish orange light emitting. The fluorescent intensity and the afterglow characteristic depends on the concentration of Sm~(3+) and the optimized concentration is 1.5 mol%. The afterglow decay curves are well fitted with triple-exponential decay models. The thermoluminescence glow curves show that the Sm~(3+) induces suitable trap depth and result in the long afterglow phenomenon, and the corresponding increase or decrease in afterglow is associated with trap concentration, nearly no change in trap depth.
机译：通过溶胶-凝胶法在较低温度下制备了红橙色的发光长余辉荧光粉Ca_2SnO_4：Sm〜（3+）。通过X射线衍射，扫描电子显微镜图像，光致发光光谱，余辉衰减曲线和热致发光光谱对合成的荧光粉进行表征。三个发射峰位于565 nm，609 nm和655 nm处，分别对应于x = 0.53和y = 0.47的CIE色度坐标，这表示发出红橙色的光。荧光强度和余辉特性取决于Sm〜（3+）的浓度，最适浓度为1.5 mol％。余辉衰减曲线与三指数衰减模型非常吻合。热致发光辉光曲线表明，Sm〜（3+）诱导了合适的陷阱深度并导致了长余辉现象，余辉的相应增加或减少与陷阱浓度有关，陷阱深度几乎没有变化。

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