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首页> 外文期刊>RSC Advances >Photoluminescence tuning via energy transfer in Eu-doped Ba-2(Gd,Tb)(2)Si4O13 solid-solution phosphors
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Photoluminescence tuning via energy transfer in Eu-doped Ba-2(Gd,Tb)(2)Si4O13 solid-solution phosphors

机译：通过Eu-掺杂Ba-2（Gd，Tb）（2）Si4O13固溶体磷光体的能量转移调节光致发光调节

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摘要

We report on the phase formation of a Ba-2(Gd,Tb)(2)Si4O13 solid-solution, and the coexistence of Eu2+/Eu3+ was identified after Eu ion doping although the samples were prepared in a reducing atmosphere. Under 377 nm near-ultraviolet (UV) light excitation, Ba2Tb2Si4O13 exhibits the characteristic emission originating from Tb3+ corresponding to D-5(4)-F-7(6,5,4,3) transitions; whereas Ba2Tb2Si4O13: Eu emits bright red emission from Eu3+ with peaks around 594, 613 and 623 nm. Accordingly, photoluminescence tuning of Eu-doped Ba-2(Gd,Tb)(2)Si4O13 phosphors has been realized from green, yellow, orange, to red emission light. Decay time and time-resolved luminescence results revealed that the tunable luminescence behavior should be ascribed to the existence of energy migration in the terbium subset, and successive energy transfer processes Eu2+-Eu3+(Tb3+) and Tb3+-Eu3+ appear to occur in the Ba2Tb2-ySi4O13: yEu (y = 0-0.12) solid-solution phosphors under investigation.
机译：我们报告了Ba-2（Gd，Tb）（2）Si4O13固溶体的相形成，并且在Eu离子掺杂后鉴定了Eu2 + / Eu3 +的共存，尽管样品在还原气氛中制备。 在377nm近紫外（UV）光励磁下，Ba2Tb2Si4O13显示出源自Tb3 +的特征发射，所述Tb3 +对应于D-5（4）-F-7（6,5,4,3）转变; 虽然Ba2tb2si4o13：欧盟eu从eu3 +发出明亮的红色发射，山峰左右约为594,613和623 nm。 因此，从绿色，黄色，橙色，红色发射光线实现了Eu-掺杂的Ba-2（Gd，Tb）（2）Si4O13磷光体的光致发光调谐。 衰变时间和时间分辨的发光结果表明，可调谐发光行为应归因于铽子集中的能量迁移的存在，并且连续的能量转移过程EU2 + -EU3 +（TB3 +）和TB3 + -eU3 +似乎发生在BA2TB2-中 YSI4O13：yeu（y = 0-0.12）正在调查的固溶体磷光体。

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  • 来源
    《RSC Advances》 |2016年第3期|共9页
  • 作者

    Zhou Jun; Xia Zhiguo; Bettinelli Marco; Liu Quanlin;

  • 作者单位

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

    Univ Verona DB Luminescent Mat Lab I-37134 Verona Italy;

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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