Luminescence properties of Eu³⁺:NaGd(WO₄)₂ nanoparticles and nanorods

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• 作者：Yeqing WANG ((王烨青))^a ; Jieqin TANG ((唐界琴))^a ; Xinyang HUANG ((黄新阳))^b ; ^{xyhuang0202@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; Liang JIANG ((江 亮))^b
• 关键词：microemulsion mediated hydrothermal method ; NaGd(WO4)2 ; Eu3+ ; red phosphors ; luminescence ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：2
• 页码：118-124
• 全文大小：908 K

文摘

The NaGd(WO₄)₂:Eu³⁺ phosphors were prepared by the microemulsion mediated hydrothermal method. The morphology and size of the samples could be dependent on the pH in the initial solution. These phosphors obtained had a strong absorption at 395 nm matching with the popular emission of near-UV LED chips, and could emit intense red light at 616 nm. The small ellipsoid-like particles or short rods were provided with large parameters of oscillator strength ω₂ and asymmetry ratio. Compared to the ellipsoid-like phosphors, the rod-like phosphors took on stronger emission, longer lifetime and larger quantum efficiency. This work demonstrated that the one-dimension NaGd(WO₄)₂:Eu³⁺ phosphors might be a more favorable device than zero-dimension ones for photoluminescence.