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首页> 外文期刊>RSC Advances >Effect of the replacement of Al-O by Si-N on the properties of Sr6Si25.6Al6.4N41.6O4.4:Eu2+ phosphors for white light-emitting diodes
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Effect of the replacement of Al-O by Si-N on the properties of Sr6Si25.6Al6.4N41.6O4.4:Eu2+ phosphors for white light-emitting diodes

机译：Si-N替代Al-N的影响对白光二极管的SR6Si25.6Al6.4N41.604.4：Eu2 +磷光体的性能

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摘要

Oxynitride phosphors Sr6Si25.6-xAl6.4+xN41.6-xO4.4+x:Eu2+ are synthesized by gas pressure sintering of powder mixture of SrCO3, AlN, Si3N4 and Eu2O3 at 1800 degrees C and 0.5 MPa of N-2 for 10 h, and their photoluminescence properties are investigated. Sr6Si25.6-xAl6.4+xN41.6-xO4.4+x:Eu2+ can be efficiently excited over a broad spectral range between 300 and 500 nm, and exhibit an intense green emission centered at about 515 nm with a full width at half maximum of 65 nm due to the 4f65d1-4f7 transition of Eu2+ ions. The influence of the replacement of Si-N by Al-O on luminescence properties and crystal structure is reported in a series of Sr6Si25.6-xAl6.4+xN41.6-xO4.4+x:Eu2+ phosphors. Different Sr sites are found in the crystal structure. The thermal quenching properties of the green phosphors are better than that of typical orthosilicate Ba2SiO4:Eu2+ phosphor. Their interesting photoluminescence properties indicate that the Sr6Si25.6Al6.4N41.6O4.4 phosphor is a promising green emitting candidate for white LEDs applications.
机译：氧氮化物磷光体SR6SI25.6-XAL6.4 + XN41.6-XO4.4 + X：Eu2 +通过在1800℃和0.5MPa的N-2的粉末混合物的气体压力烧结合成粉末混合物和0.5MPa的N-2 10小时，并研究了它们的光致发光性能。 SR6SI25.6-XAL6.4 + XN41.6-XO4.4 + X：EU2 +可以在300到500nm之间的宽光谱范围内有效激发，并且在大约515nm处表现出具有全宽度的强烈绿色排放由于Eu2 +离子的4F65D1-4F7过渡，半最大65nm。通过Al-O替换Si-N对发光性能和晶体结构的影响是在一系列SR6SI25.6-XAL6.4 + XN41.6-XO4.4 + X：EU2 +磷光体中。在晶体结构中发现不同的SR网站。绿色磷光体的热猝灭性质优于典型的外硅酸盐Ba2siO4：Eu2 +磷光体。它们有趣的光致发光性质表明SR6SI25.6AL6.4N41.6O4.4磷光体是白色LED应用的有前景的绿色发光候选者。

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  • 来源
    《RSC Advances》 |2015年第16期|共6页
  • 作者

    Ma Qian; Zhao Chunlei; Xu Huibing; Liu Ronghui; Ye Hongqi; Hu Yunsheng; Liu Yuanhong; Chen Guantong;

  • 作者单位

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

    Grirem Adv Mat Co Ltd Natl Engn Res Ctr Rare Earth Mat Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China;

    Grirem Adv Mat Co Ltd Natl Engn Res Ctr Rare Earth Mat Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China;

    Cent S Univ Coll Chem &

    Chem Engn Changsha 410083 Peoples R China;

    Grirem Adv Mat Co Ltd Natl Engn Res Ctr Rare Earth Mat Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China;

    Grirem Adv Mat Co Ltd Natl Engn Res Ctr Rare Earth Mat Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China;

    Grirem Adv Mat Co Ltd Natl Engn Res Ctr Rare Earth Mat Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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