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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Study on optical properties of rare-earth ions in nanocrystalline monoclinic SrAl2O4: Ln (Ln = Ce3+, Pr3+, Tb3+)
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Study on optical properties of rare-earth ions in nanocrystalline monoclinic SrAl2O4: Ln (Ln = Ce3+, Pr3+, Tb3+)

机译：纳米晶单斜SrAl2O4：Ln（Ln = Ce3 +，Pr3 +，Tb3 +）中稀土离子的光学性质研究

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摘要

SrAl2O4: Ln (Ln = Ce3+, Pr3+, Tb3+) nanocrystals have been synthesized by the combustion method. The results of XRD indicated that the resulting SrAl2O4: Ln (Ln = Ce3+, Pr3+, Tb3+) nanocrystals have a reduced and distorted monoclinic lattice compared with bulk materials. The spectral properties are measured, and it is found that the excitation peaks of 5d energy levels red shift in nanocrystals in contrast to that in bulk crystals. The mechanism of spectra and energy changes is investigated. The order of the degree of red shift for nano SrAl2O4: Ln (Ln = Ce3+, Pr3+, Tb3+) crystals is Pr3+ > Ce3+ > Tb3+, which is in good agreement with our predicted results.
机译：SrAl2O4：Ln（Ln = Ce3 +，Pr3 +，Tb3 +）纳米晶体已通过燃烧方法合成。 X射线衍射的结果表明，与块状材料相比，所得SrAl2O4：Ln（Ln = Ce3 +，Pr3 +，Tb3 +）纳米晶体具有减少且变形的单斜晶格。测量了光谱特性，发现与大块晶体相比，纳米晶体中5d能级的激发峰发生红移。研究了光谱和能量变化的机理。纳米SrAl2O4：Ln（Ln = Ce3 +，Pr3 +，Tb3 +）晶体的红移程度顺序为Pr3 +> Ce3 +> Tb3 +，这与我们的预测结果非常吻合。

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