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首页> 外文期刊>RSC Advances >Highly efficient red-emitting Ca2YSbO6:Eu3+ double perovskite phosphors for warm WLEDs
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Highly efficient red-emitting Ca2YSbO6:Eu3+ double perovskite phosphors for warm WLEDs

机译：高效红发CA2YSBO6：EU3 +双重钙钛矿磷光体用于温暖的WLED

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摘要

Highly efficient red-emitting Eu3+-doped double perovskite Ca2YSbO6 phosphors have been successfully prepared by the traditional high-temperature solid state method. The phase purity, photoluminescence and decay properties as a function of the Eu3+ concentration have been investigated in detail. The XRD results demonstrate that all of the obtained phosphors can be assigned to a pure monoclinic structure. Upon 464 nm excitation, a strong red emission situated at 614 nm (D-5(0)-F-7(2)) indicates that Eu3+ ions occupy a site with low symmetry. The quenching concentration of Eu3+ ions reaches as high as 70 mol% and the quenching mechanism is discussed. Especially, the prepared phosphor exhibits a high quantum efficiency of 92.1% and superior thermal stability, with PL intensity at 423 K up to 81.6% of that at room temperature. Moreover, a warm white light with a correlated color temperature of 4720 K and a color rendering index of 82.6 is achieved by fabricating a Ca2YSbO6:Eu3+ phosphor in a 460 nm blue-InGaN chip together with the commercial Y3Al5O12:Ce3+ yellow phosphor.
机译：通过传统的高温固态方法成功地制备了高效的红色发射EU3 + - 掺杂双钙钛矿CA2YSBO6磷光体。已经详细研究了作为EU3 +浓度的函数的相纯度，光致发光和衰减性能。 XRD结果表明，所有得到的磷光体都可以分配给纯单斜晶体结构。在464nm激发时，位于614nm（d-5（0）-f-7（2））的强红色发射表明Eu3 +离子占据具有低对称性的部位。 EU3 +离子的猝灭浓度高达70摩尔％，讨论猝灭机理。特别是，制备的磷光体具有92.1％的高量子效率和优异的热稳定性，PL强度在室温下为423 k，其可达81.6％。此外，通过在460nm蓝锭芯片中与商业Y3Al5O12：Ce3 +黄色磷光体一起制造Ca2ysbo6：Eu3 +荧光体，通过塑性具有4720k的颜色温度和82.6的显色指数的暖白光和82.6的显色指数。

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  • 来源
    《RSC Advances》 |2019年第36期|共7页
  • 作者

    Liu Meijiao; Shen Biao; Wang Keyuan; Zhong Jiasong; Chen Daqin;

  • 作者单位

    Zhejiang Sci Tech Univ Dept Chem Hangzhou 310018 Zhejiang Peoples R China;

    Hangzhou Dianzi Univ Coll Mat &

    Environm Engn Hangzhou 310018 Zhejiang Peoples R China;

    Hangzhou Dianzi Univ Coll Mat &

    Environm Engn Hangzhou 310018 Zhejiang Peoples R China;

    Hangzhou Dianzi Univ Coll Mat &

    Environm Engn Hangzhou 310018 Zhejiang Peoples R China;

    Fujian Normal Univ Coll Phys &

    Energy Fuzhou 350117 Fujian Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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