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首页> 外文期刊>Materials Chemistry and Physics. >Spectroscopy characteristics of vanadate Ca_9Dy(VO_4)_7 for application of white-light-emitting diodes
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Spectroscopy characteristics of vanadate Ca_9Dy(VO_4)_7 for application of white-light-emitting diodes

机译：钒酸钙Ca_9Dy（VO_4）_7在白色发光二极管中的光谱特性

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摘要

A vanadate, Ca_9Dy(VO_4)_7, was synthesized by the general high temperature solid-state reaction in air atmosphere. X-ray powder diffraction analysis confirmed the formation of single phase Ca_9Dy(VO_4)_7. Pho-toluminescence excitation spectrum showed that the phosphor could be efficiently excited by UV-visible light from 250 to 500 nm. The characteristic emission peaks of Dy~(3+) were observed in the emission spectra due to the transitions of ~4F_(9/2)→ ~6H_(15/2) at 483 nm and ~4F_(9/2)→ ~6H_(13/2) at 573 nm. The photolumines-cence measurements showed that the Ca_9Dy(VO_4)_7 exhibited an improved chromaticity compared with YVO_4:Dy~(3+). This was ascribed to lower site symmetry and disordered cation sites in Ca_9Dy(VO_4)_7 The luminescence characteristics of Ca_9Dy(VO_4) indicated that this phosphor has a possible application for white-light-emitting diode. Luminescence mechanism and site occupancies of Dy~(3+) ions in Ca_9Dy(VO_4)_7 lattices were discussed.
机译：钒酸盐Ca_9Dy（VO_4）_7是通过在大气中进行的一般高温固态反应合成的。 X射线粉末衍射分析证实了单相Ca_9Dy（VO_4）_7的形成。磷光激发光谱表明，磷光体可以被250至500 nm的紫外线可见光有效地激发。由于〜4F_（9/2）→〜6H_（15/2）在483 nm和〜4F_（9/2）→〜的跃迁，在发射光谱中观察到Dy〜（3+）的特征发射峰。在573 nm下为6H_（13/2）。光致发光法测量表明，与YVO_4：Dy〜（3+）相比，Ca_9Dy（VO_4）_7的色度得到改善。这归因于Ca_9Dy（VO_4）_7中较低的位点对称性和无序的阳离子位点。Ca_9Dy（VO_4）的发光特性表明该磷光体可能用于发白光的二极管。探讨了Ca_9Dy（VO_4）_7晶格中Dy〜（3+）离子的发光机理和位点占有率。

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  • 来源
    《Materials Chemistry and Physics.》 |2009年第3期|449-452|共4页
  • 作者

    Xiao Wu; Yanlin Huang; Liang Shi; Hyo Jin Seo;

  • 作者单位

    College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;

    College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China;

    Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea;

    Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea;

  • 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
  • 中图分类
  • 关键词

    inorganic compounds; chemical synthesis; photoluminescence spectroscopy; optical properties;

    机译：无机化合物化学合成光致发光光谱;光学性质;

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