Sm3+/Eu3+共掺四方相LaOF纳米体系中能量传递效应的光谱学研究

doi:10.3964/j.issn.1000-0593(2011)08-2183-04

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摘要：采用水热-烧结法制备了Sm³⁺/Eu³⁺共掺的LaOF纳米晶体颗粒, X射线衍射和透射电子显微镜表征结果显示, 所制备的LaOF晶体的平均颗粒直径在60～80 nm之间, 呈四方相, 均匀性和分散性良好。通过442 nm连续光激发, 在LaOF∶Sm³⁺/Eu³⁺纳米体系中实现了Sm³⁺向Eu³⁺的能量传递。运用光谱学方法对共掺纳米体系的荧光发射谱性质进行了分析, 探讨了Sm³⁺/Eu³⁺能量传递的机理和动力学过程。实验结果表明, 随着共掺体系中Eu³⁺掺杂浓度的增加, Sm³⁺向Eu³⁺传递能量的效率增高。

关键词：LaOF∶Sm³⁺/Eu³⁺;纳米晶体;能量传递;光谱学性质

Abstract：The powder samples of Sm³⁺/Eu³⁺co-doped in LaOF nanocrystals were synthesized by using a hydrothermal-sintering technique. The characterization results of XRD and TEM suggests that the structure of the nanocrystals is tetragonal, and its size is between 60～80 nm. Using 442 nm laser to pump the LaOF∶Sm³⁺/Eu³⁺ nanocrystals samples, the energy transfer effect from Sm³⁺ ions to Eu³⁺ ions was completed, and the fluorescence emissions originating from the ⁵D₀ level of Eu³⁺ were observed. The luminescence properties of the LaOF∶Sm³⁺/Eu³⁺ nanocrystals system were analyzed with a spectroscopic method, and the mechanism and dynamic process of the energy transfer were explored. It was found that the efficiency of the energy transfer increase with the increase in the concentration of Eu³⁺ ions and the size of nanocrystals.

Key words：LaOF∶Sm³⁺/Eu³⁺;Nanocrystals system;Energy transfer;Spectroscopic property

收稿日期: 2010-08-23 修订日期: 2010-11-20

中图分类号:	O482.3
	O782+.9

通讯作者: 郑海荣 E-mail: hrzheng@snnu.edu.cn

引用本文:

伏振兴^{1, 2}, 郑海荣^1*, 刘碧蕊² . Sm³⁺/Eu³⁺共掺四方相LaOF纳米体系中能量传递效应的光谱学研究[J]. 光谱学与光谱分析, 2011, 31(08): 2183-2186.
FU Zhen-xing^{1, 2}, ZHENG Hai-rong^1*, LIU Bi-rui² . Spectroscopic Study on the Energy Transfer Effect in Sm³⁺/Eu³⁺ Codoped Tetragonal LaOF Nanocrystals System. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(08): 2183-2186.

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