| Pr~（3＋）/Yb~（3＋）共掺氟化物微米晶体的上转换荧光研究 |
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| 引用本文： | 高伟,郑海荣,李娇,高当丽,何恩节,涂银勋.Pr~（3＋）/Yb~（3＋）共掺氟化物微米晶体的上转换荧光研究[J].中国科学:物理学 力学 天文学,2012(10):1003-1011. |
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| 作者姓名： | 高伟 郑海荣 李娇 高当丽 何恩节 涂银勋 |
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| 作者单位： | 陕西师范大学物理学与信息技术学院,西安710062 |
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| 基金项目： | 国家自然科学基金资助项目（批准号：11174190）感谢陕西师范大学物理学与信息技术学院朱刚强老师在样品制作方面的大力支持. |
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| 摘 要： | 以乙二胺四乙酸（EDTA）为络合剂,应用水热法合成了Pr3＋/Yb3＋共掺的六方相NaYF4和四方相LiYF4微米晶体.研究了晶相和电声子相互作用对Pr3＋离子荧光特性的影响.在波长为976.4nm激光的激发下,在六方相NaYF4：Yb3＋/Pr3＋和四方相LiYF4：Yb3＋/Pr3＋中分别获得了赤眼可观的上转换荧光发射.与六方相NaYF4：Yb3＋/Pr3＋微米晶体的荧光相比,源于四方相LiYF4：Yb3＋/Pr3＋微米晶体中荧光发射谱线变窄、强度变弱并发生蓝移.分析研究了荧光上转换过程、晶相结构及上转换荧光强度对Yb3＋离子浓度的依赖关系.
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| 关 键 词： | 氟化物微米晶体 水热法 上转换发光 |
Up-conversion luminescence of pr3＋/yb3＋ co-doped fluoride microcrystals |
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| GAO Wei,ZHENG HaiRong,LI Jiao,GAO DangLi,HE EnJie ＆ TU YinXun.Up-conversion luminescence of pr3＋/yb3＋ co-doped fluoride microcrystals[J].Scientia Sinica Pysica,Mechanica & Astronomica,2012(10):1003-1011. |
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| Authors: | GAO Wei ZHENG HaiRong LI Jiao GAO DangLi HE EnJie ＆ TU YinXun |
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| Institution: | College of Physice and Information technology, Shaanxi Normal University, Xi＇an 710062, China |
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| Abstract: | pr3＋/yh3＋ codoped hexagonal NaYF4 and tetragonal LiYF4 microcrystals （MCs） were synthesized by hydrothermal method, in which the EDTA was used as a chelating agent. The influence of the crystal phase and electron-phonon interaction on the fluorescence emission of Pr3＋ was investigated. In hexagonal phased NaYF4： yb3＋/pr3＋ and tetragonal phased LiYF4： yb3＋/pr3＋ rnicrocrystals, we have observed bright up conversion emission when the samples were excited with 976.4 nm laser. The fluorescence tetragonal LiYF4： yb3＋/pr3＋ microcrystals was weaker and sharper than that from hexagonal NaYF4： yb3＋/pr3＋ microcrystals, and a blue shift was observed too. We have also studied the process of up conversion, the influence of crystal phase, and the dopant concentration. |
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| Keywords: | fluoride microcrystals hydrothermal method up-conversion luminescence |
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