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首页> 外文期刊>Physica, B. Condensed Matter >Temperature-dependence of the structural and afterglow luminance properties of polymer/SrAl _xO _y:Eu ~(2+),Dy ~(3+) composites
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Temperature-dependence of the structural and afterglow luminance properties of polymer/SrAl _xO _y:Eu ~(2+),Dy ~(3+) composites

机译：聚合物/ SrAl _xO _y：Eu〜（2 +），Dy〜（3+）复合材料的结构和余辉亮度特性与温度的关系

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摘要

Although aluminate phosphors have attracted great interest for applications in lamps, cathode ray tubes and plasma display panels, there still remain issues affecting operational parameters such as luminescence efficiency, stability against temperature, high color purity and perfect decay time. In addition, issues involving important aspects of the monoclinic?hexagonal phase transition temperature still exist. In this work, SrAl _xO _y:Eu ~(2+),Dy ~(3+) phosphor powders were prepared by the solgel method. X-ray diffraction (XRD) has shown that both crystallinity and crystallite sizes increased as the temperature increased. Both SrAl _2O _4 and Sr _2Al _3O _6 phases were observed. Photoluminescence (PL) characterization shows temperature-dependence, which indicates emission at low and high annealing temperatures originating from Eu ~(2+) and Eu ~(3+) ions. Thermoluminescence glow and decay measurements provided useful insight on the influence of traps on luminescence behavior. Differential scanning calorimetry (DSC) and thermogravimetric studies (TGA) on composites of the phosphor in low density polyethylene (LDPE) demonstrated the varied influence of annealing temperature on some luminescence and thermal properties.
机译：尽管铝酸盐磷光体已经吸引了在灯，阴极射线管和等离子显示面板中的应用，但是仍然存在影响工作参数的问题，例如发光效率，耐高温稳定性，高色纯度和完美的衰减时间。另外，涉及单斜六方相变温度重要方面的问题仍然存在。在这项工作中，通过溶胶凝胶法制备了SrAl_xO_y：Eu〜（2 +），Dy〜（3+）荧光粉。 X射线衍射（XRD）表明，结晶度和微晶尺寸均随温度升高而增加。 SrAl _2O _4和Sr _2Al _3O _6相均被观察到。光致发光（PL）表征显示出温度依赖性，这表明在低退火温度和高退火温度下的发射均源自Eu〜（2+）和Eu〜（3+）离子。热发光的辉光和衰减测量为陷阱对发光行为的影响提供了有用的见解。在低密度聚乙烯（LDPE）中对磷光体复合材料的差示扫描量热法（DSC）和热重分析（TGA）表明，退火温度对某些发光和热性能的影响不同。

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