Sm^(3+)/Eu^(3+)共掺四方相LaOF纳米体系中能量传递效应的光谱学研究  

Spectroscopic Study on the Energy Transfer Effect in Sm^(3+)/Eu^(3+) Codoped Tetragonal LaOF Nanocrystals System

作　　者：伏振兴[1,2] 郑海荣[1] 刘碧蕊[2] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062 [2]宁夏师范学院物理与信息技术学院,宁夏固原756000

出　　处：《光谱学与光谱分析》2011年第8期2183-2186,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(10875075);陕西省自然科学基金项目(SJ08-ZT13);宁夏科技攻关计划项目(08222-19);宁夏自然科学基金项目(NZ10226)资助

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60～80nm之间,呈四方相,均匀性和分散性良好。通过442nm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。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.

关 键 词：LaOF∶Sm3+/Eu3+ 纳米晶体 能量传递 光谱学性质 

分 类 号：O482.3[理学—固体物理] O782.9[理学—物理]