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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Upconversion luminescence of Yb～(3+)/Tb～(3+)/Er～(3+)-doped fluorosilicate glass ceramics containing SrF_2 nanocrystals
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Upconversion luminescence of Yb～(3+)/Tb～(3+)/Er～(3+)-doped fluorosilicate glass ceramics containing SrF_2 nanocrystals

机译：含SrF_2纳米晶体的掺Yb〜（3 +）/ Tb〜（3 +）/ Er〜（3+）氟硅酸盐玻璃陶瓷的上转换发光

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摘要

Yb～(3+)/Tb～(3+)/Er～(3+)-doped transparent alkaline earth fluorosilicate glass ceramics containing SrF_2 nanocrystals were prepared and their microstructures and spectroscopic properties were investigated. The formation ofSrF_2 nanocrystals enriched with Yb～(3+)/Tb～(3+)/Er～(3+) in the glass ceramics was confirmed by XRD, HRTEM and SAED. The glass ceramics exhibited intense upconversion luminescence behaviors, owing to efficient energy transfers from Yb~(3+) to Er～(3+) and Tb～(3+) and low phonon assistant non-radiative transition probabilities of excited Er～(3+) and Tb～(3+). The upconversion could be enhanced significantly by increasing the annealing temperature and the luminescence color could be adjusted by varying the Yb～(3+)/Tb～(3+)/Er～(3+) ratio. Upconversion of Er～(3+) could be described as sequential energy transfer from single Yb～(3+) to single Er～(3+), while upconversion of Tb～(3+) described as cooperative energy transfer from double Yb～(3+) to single Tb～(3+).
机译：制备了含SrF_2纳米晶的掺Yb〜（3 +）/ Tb〜（3 +）/ Er〜（3+）透明碱土金属氟硅酸盐玻璃陶瓷，并对其微观结构和光谱性质进行了研究。通过XRD，HRTEM和SAED对玻璃陶瓷中富含Yb〜（3 +）/ Tb〜（3 +）/ Er〜（3+）的SrF_2纳米晶体的形成进行了确认。由于Yb〜（3+）到Er〜（3+）和Tb〜（3+）的有效能量转移以及激发Er〜（3 +）和Tb〜（3+）。通过提高退火温度可以明显提高上转换率，并且可以通过改变Yb〜（3 +）/ Tb〜（3 +）/ Er〜（3+）比例来调节发光颜色。 Er〜（3+）的上转换被描述为从单个Yb〜（3+）到单个Er〜（3+）的顺序能量转移，而Tb〜（3+）的上转换被描述为从双Yb〜的协同能量转移。 （3+）至单个Tb〜（3+）。

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