发光学报, 2014, 35 (5): 565, 网络出版: 2014-05-06  

Zr4+掺杂对Er3+/Yb3+共掺NaYF4微晶晶相和发光性能的影响

Influence of Zr4+ Doping Impurity on Crystal Phase and Upconversion Luminescence of Er3+/Yb3+ Codoped NaYF4 Microcrystals
作者单位
中国计量学院 材料科学与工程学院, 浙江 杭州310018
摘要
采用油酸辅助的水热法制备了Er3+/Yb3+共掺NaYF4微晶, 通过在反应体系中引入Zr4+离子, 实现了NaYF4微晶的晶相控制和上转换发光增强。X-射线衍射和扫描电镜结果表明: Zr4+离子的引入能够明显加快立方相α-NaYF4向六方相β-NaYF4的相转变过程。当Zr4+离子的引入摩尔分数为5%时, 获得了纯的六方相β-NaYF4微晶。 Er3+/Yb3+共掺NaYF4微晶在980 nm激光泵浦下, 观察到强的上转换绿光和红光发射, 且上转换发光强度随着Zr4+离子添加量的增加逐渐增大。
Abstract
Er3+/Yb3+ codoped NaYF4 microcrystals were prepared via a facile hydrothermal approach assisted with oleic acid. The cubic-to-hexagonal phase transition and enhancement of up-conversion luminescence of Er3+ ions were simultaneously achieved by the gradual addition of Zr4+ ions in the reaction system. X-ray diffraction and SEM results indicated that the introduction of Zr4+ ions could remarkably accelerate the cubic-to-hexagonal phase transition process and pure hexagonal NaYF4 microcrystals were obtained, when Zr4+ mole fraction reached 5%. Strong green and red up-conversion luminescence of Er3+ ions was observed and the up-conversion intensity increased gradually with the addition of Zr4+ ions.

郭子轩, 赵士龙, 黄立辉, 陈水林, 夹国华, 徐时清. Zr4+掺杂对Er3+/Yb3+共掺NaYF4微晶晶相和发光性能的影响[J]. 发光学报, 2014, 35(5): 565. GUO Zi-xuan, ZHAO Shi-long, HUANG Li-hui, CHEN Shui-lin, JIA Guo-hua, XU Shi-qing. Influence of Zr4+ Doping Impurity on Crystal Phase and Upconversion Luminescence of Er3+/Yb3+ Codoped NaYF4 Microcrystals[J]. Chinese Journal of Luminescence, 2014, 35(5): 565.

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