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Facile synthesis and optical properties of Ce:YAG polycrystalline ceramics with different SiO2 content

机译：Ce：Ce：YAG多晶陶瓷具有不同SiO2含量的易于合成和光学性质

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摘要

Ce:YAG polycrystalline ceramics with different SiO2 content were successfully prepared by a single-step melt-quenching method. The characterization of the resulting polycrystalline ceramics was accomplished by using X-ray powder diffraction, field emission scanning electronic microscopy and energy dispersive X-ray spectroscopy. Then, the optical properties were investigated using a fluorescence spectrometer. It is found that the glass matrix becomes a glassy state more easily, the photoluminescence excitation (PLE) and PL intensity decrease obviously and crystallization of YAG is difficult to generate as the SiO2 content increases. What's more, the intensity of the blue LED decreases and that of the yellow emission band instead increases and saturates at a SiO2 content of 32 mol% in the electroluminescent (EL) spectra. Afterwards, the photoelectric performance was studied by an LED spectrometer. As a consequence, the constructed polycrystalline ceramic based WLED exhibits a high luminous efficiency of 74.44 lm W-1, and a correlated color temperature of 5351 K as well as a color rendering index of 75.91, which reveals the prominent feasibility of the present polycrystalline ceramic material in WLED applications.
机译：CE：通过单步熔解方法成功制备具有不同SiO2含量的YAG多晶陶瓷。通过使用X射线粉末衍射，现场发射扫描电子显微镜和能量分散X射线光谱完成所得到的多晶陶瓷的表征。然后，使用荧光光谱仪研究光学性质。发现玻璃基质更容易变成玻璃状状态，显着的光致发光激发（PLE）和PL强度降低，并且随着SiO 2含量的增加，毫无难以产生YAG的结晶。更重要的是，蓝色LED的强度降低，而黄色发射带的强度在电致发光（EL）光谱中以32摩尔％的SiO 2含量增加和饱和。然后，通过LED光谱仪研究光电性能。结果，基于构造的多晶陶瓷的WLED具有74.44升LM W-1的高发光效率，以及5351k的相关色温以及75.91的显色指数，揭示了本发明的多晶陶瓷的突出可行性WLED应用中的材料。

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  • 来源
    《RSC Advances》 |2015年第92期|共6页
  • 作者

    Gong Maogao; Xiang Weidong; Huang Jun; Yin Congfei; Liang Xiaojuan;

  • 作者单位

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Zhejiang Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Zhejiang Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Zhejiang Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Zhejiang Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Zhejiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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