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    • Er 3+ ,Yb 3+ 共掺杂的NaYF 4 荧光粉的制备及下转换发光研究

    CAI Shu-zhen,LIU Lin-lin,LI Ming-ming,YU Fang,MI Cao,LI Xiao-dong,ZHANG Jiao,LIU Yan-zhou,YANG Yan-min

    Chinese Journal of Luminescence（2014）

    Cited 5|Views4
    Abstract
    采用高温固相法合成了Er3+、Yb3+共掺杂的NaYF4荧光粉。XRD测量数据表明合成的样品为纯相。测量了样品的激发谱和发射谱,证明377 nm的紫外光通过量子剪裁的形式将能量传递给一个Yb3+,发射一个975 nm的红外光子,再从4F9/2能级跃迁到基态发射一个红外光子。测量了377 nm激发下,监测541 nm的发光寿命曲线,计算得到最大的量子效率为126.35%。通过监测Yb3+的975 nm的近红外发射,证明了Er3+的4F7/2和2H11/2能级通过下转换的形式将吸收的485 nm和519 nm的能量传递给Yb3+。这种将Er3+在可见光波段的多种光子能量传递给Yb3+发射975 nm的近红外光子的思想在以前的研究中从未被提出。
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    down-conversion,quantum cutting,lifetime,quantum efficiency,solar cells
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