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首页> 外文期刊>RSC Advances >A novel near-ultraviolet (NUV) converting blue-violet Ca2-xAlMg0.5Si1.5O7:xCe(3+) phosphor for white light-emitting-diodes (w-LEDs)
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A novel near-ultraviolet (NUV) converting blue-violet Ca2-xAlMg0.5Si1.5O7:xCe(3+) phosphor for white light-emitting-diodes (w-LEDs)

机译：近乎紫外线（NUV）转换蓝紫CA2-XALMG0.5SI1.5O7：XCE（3+）磷光体用于白色发光二极管（W-LED）

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摘要

Ce3+ doped aluminosilicate phosphors (Ca2-xAlMg0.5Si1.5O7:xCe(3+), x = 0.015-0.075) for white NUV w-LEDs were synthesized by a solid-state reaction method at 1250 degrees C. The as-prepared samples were characterized by XRD and fluorescence spectrophotometry; the obtained XRD results show that the target phase was synthesized and doping with Ce3+ did not result in an impurity phase. The as-prepared phosphors exhibit a strong blue-violet emission under the near-ultraviolet radiation excitation. Corresponding fitting results show the emission spectra contain two distinct single bands, which come from the transition of D-2(3/2) -> F-2(7/2) and F-2(5/2) of the Ce3+ ion. The colorimetric coordinates of the sample with x = 0.03 are (0.1574, 0.0359), located in the blue-violet region. In addition, the sample exhibits high external quantum efficiency (EQE = 37.3%) and excellent thermal stability (T-50 = 230 degrees C). We obtained bright blue-violet light by pumping the sample with NUV light (lambda = 365 nm), which suggests that this material has the potential for application as a NUV converting blue-violet phosphor for the NUV w-LEDs.
机译：CE3 +掺杂铝硅酸盐磷光体（CA2-XALMG0.5SI1.5O7：XCE（3+），X = 0.015-0.015-0.075）在1250℃下通过固态反应方法合成了白色NUV W-LED。制备的样品以XRD和荧光分光光度法为特征;所获得的XRD结果表明，靶相合成并用CE3 +掺杂，不会导致杂质相。在近紫外线辐射激发下，制备的磷光体在近紫外线辐射激发下表现出强烈的蓝紫发射。相应的拟合结果表明发射光谱含有两个不同的单带，来自CE3 +离子的D-2（3/2） - > F-2（7/2）和F-2（5/2）的转变。样品的比色坐标具有X = 0.03（0.1574,0.0359），位于蓝紫色区域。此外，样品表现出高外部量子效率（EQE = 37.3％）和优异的热稳定性（T-50 = 230℃）。通过用Nuv灯（Lambda = 365nm）泵送样品，我们获得了亮蓝紫光，这表明该材料具有应用作为Nuv转换为Nuv W-LED的蓝紫磷光体。

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  • 来源
    《RSC Advances》 |2016年第3期|共6页
  • 作者

    Zhao Cong; Zhu Da-chuan; Tu Ming-jing; Huang Min; Peng Ling-ling; Han Tao;

  • 作者单位

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Coll Mat Sci &

    Engn Chengdu 610065 Sichuan Peoples R China;

    Chongqing Univ Arts &

    Sci Res Inst New Mat Technol Chongqing 402160 Peoples R China;

    Chongqing Univ Arts &

    Sci Res Inst New Mat Technol Chongqing 402160 Peoples R China;

    Chongqing Univ Arts &

    Sci Res Inst New Mat Technol Chongqing 402160 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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