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YVO_4: RE~(3+) (RE = Eu, Sm, Dy, Er) nanophosphors: Facile hydrothermal synthesis, microstructure, and photoluminescence

机译:YVO_4:RE〜(3 +)(RE = Eu,Sm,Dy,Er)纳米磷光体:便捷的水热合成,微观结构和光致发光

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摘要

YVO_4: 10%RE~(3+) (RE = Eu, Sm, Dy, Er) nanophosphors have been synthesized by a facile modified hydrothermal technology to obtain the high purity. The key procedure for this hydrothermal process is the adding order of precursors, in which excess sodium vanadate should be added in the solution of rare earth nitrates. The microstructure (crystal phase, morphology, particle size) of these phosphors are characterized by x-ray powder diffraction, scanning electron microscope, and transmission electron microscope, which indicates that there are some cube-like crystals with tetragonal zircon structure and the average particle size is approximately 40 nm. The luminescent behaviors for the four rare earth ion-activated YVO_4 nanophosphors have been studied, and, for YVO_4: 10%Eu~(3+) nanophosphors in particular, it is found that a different hydrothermal process influences the phase composition, microstructure, and photoluminescence. This result suggests that the hydrothermal synthesis process (by adding sodium vanadate to the solution of rare earth nitrates) is favorable for YVO_4 nanophosphor to obtain pure phase, small particle size, long luminescent lifetime, and high luminescence quantum efficiency.
机译:YVO_4:10%RE〜(3 +)(RE = Eu,Sm,Dy,Er)纳米磷光体是通过一种简便的改良水热技术合成得到的高纯度。该水热过程的关键步骤是前体的添加顺序,其中应在稀土硝酸盐溶液中添加过量的钒酸钠。通过X射线粉末衍射,扫描电子显微镜和透射电子显微镜对这些荧光粉的微观结构(晶相,形貌,粒度)进行了表征,表明存在一些具有方形锆石结构的立方晶体,其平均颗粒尺寸约为40 nm。研究了四种稀土离子激活的YVO_4纳米磷光体的发光行为,特别是对于YVO_4:10%Eu〜(3+)纳米磷光体,发现不同的水热过程会影响相组成,微观结构和光致发光。该结果表明,水热合成工艺(通过将钒酸钠添加到稀土硝酸盐溶液中)有利于YVO_4纳米磷光体获得纯相,小粒径,长发光寿命和高发光量子效率。

著录项

  • 来源
    《Journal of Materials Research》 |2009年第10期|3050-3056|共7页
  • 作者

    Bing Yan; Jianhua Wu;

  • 作者单位

    Department of Chemistry, Tongji University, Shanghai 200092, China;

    Department of Chemistry, Tongji University, Shanghai 200092, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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