Upconversion luminescence of Yb3+/Tb3+/Er3+-doped fluorosilicate glass ceramics containing SrF2 nanocrystals

Upconversion luminescence of Yb3+/Tb3+/Er3+-doped fluorosilicate glass ceramics containing SrF2 nanocrystals
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含SrF2纳米晶的Yb3/Tb3/Er3掺杂氟硅酸盐玻璃陶瓷的上转换发光

DOI:
10.1016/j.jallcom.2011.01.099
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发表时间:
2011-04
影响因子:
6.2
通讯作者:
Luo, Qun
Luo, Qun
中科院分区:
材料科学2区
文献类型:
--
作者:
Qiao, Xvsheng;Fan, Xianping;Xue, Zheng;Xu, Xuanhe;Luo, Qun

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制备了Yb3+/Tb3+/Er3+掺杂的含SrF2纳米晶的透明碱土氟硅酸盐玻璃陶瓷,并对其微观结构和光谱性能进行了研究。用X射线衍射仪、高分辨电子显微镜和扫描电子能谱仪证实了微晶玻璃中形成了富Yb3+/Tb3+/Er3+的纳米晶。由于Yb3+向Er3+和Tb3+的有效能量转移,以及受激发的Er3+和Tb3+的低声子辅助非辐射跃迁几率,微晶玻璃表现出强烈的上转换发光行为。通过改变Yb3+/Tb3+/Er3+的比例,可以显著提高上转换发光强度,并调节发光颜色。Er3+的上转换可以描述为从单一Yb3+到单一Er3+的顺序能量转移,而Tb3+的上转换可以描述为从双Yb3+到单一Tb3+的协同能量转移。
Yb3+/Tb3+/Er3+-doped transparent alkaline earth fluorosilicate glass ceramics containing SrF2nanocrystals were prepared and their microstructures and spectroscopic properties were investigated. The formation of SrF2nanocrystals enriched with Yb3+/Tb3+/Er3+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 Yb3+to Er3+and Tb3+and low phonon assistant non-radiative transition probabilities of excited Er3+and Tb3+. The upconversion could be enhanced significantly by increasing the annealing temperature and the luminescence color could be adjusted by varying the Yb3+/Tb3+/Er3+ratio. Upconversion of Er3+could be described as sequential energy transfer from single Yb3+to single Er3+, while upconversion of Tb3+described as cooperative energy transfer from double Yb3+to single Tb3+.
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