| 核壳纳米结构壳中Yb离子对稀土上转换发光温度特性的影响 |
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| 引用本文： | 谢轩,吴飞,李齐清,薛彬,孔祥贵.核壳纳米结构壳中Yb离子对稀土上转换发光温度特性的影响[J].发光学报,2015,36(12):1390-1395. |
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| 作者姓名： | 谢轩 吴飞 李齐清 薛彬 孔祥贵 |
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| 作者单位： | 1. 发光学及应用国家重点实验室 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033;
2. 中国科学院大学, 北京 100049 |
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| 基金项目： | 国家自然科学基金(61275202,61575194,21304084,11374297,11504371,51372096)资助项目 |
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| 摘 要： | 采用油酸盐法分别制备出均匀的上转换发光裸核纳米粒子及其包覆具有不同Yb3+浓度掺杂的NaYF4:Yb3+,Er3+核壳纳米结构的上转换纳米粒子。在不同温度下(90~450 K),研究分析了在壳中掺杂不同浓度Yb3+的NaYF4:Yb3+,Er3+@NaYF4:x%Yb3+核壳纳米体系的上转换发光特性。结果表明:在NaYF4:Yb3+,Er3+上转换体系中,惰性壳中的525 nm(2H11/2 →4I15/2)发射峰呈现出与活性壳中不一样的趋势。壳层中掺杂的Yb3+通过声子对纳米粒子内部发光与表面及外界之间的相互作用起到了重要的"桥"连作用。
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| 关 键 词： | 上转换 温度依赖 能级布居 稀土 |
| 收稿时间： | 2015-08-12 |
Effects of Yb3+ in Shell on Temperature Dependent Upconversion Luminescence of NaYF4:Yb3+,Er3+@NaYF4:x%Yb3+ Core/ Shell Nanostructures |
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| XIE Xuan,WU Fei,LI Qi-qing,XUE Bin,KONG Xiang-gui.Effects of Yb3+ in Shell on Temperature Dependent Upconversion Luminescence of NaYF4:Yb3+,Er3+@NaYF4:x%Yb3+ Core/ Shell Nanostructures[J].Chinese Journal of Luminescence,2015,36(12):1390-1395. |
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| Authors: | XIE Xuan WU Fei LI Qi-qing XUE Bin KONG Xiang-gui |
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| Institution: | 1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Uniform NaYF4:Yb3+,Er3+@NaYF4:x%Yb3+ (x=0, 20, 40, 60) nanoparticles were synthesized through thermolysis in oleic acid and 1-octadecene. The upconversion luminescence of these core/shell nanostructures was explored at different temperatures (90-450 K). The results demonstrate that the emission at 525 nm(2H11/2 →4I15/2) of core/inert-shell nanoparticles exhibites a different growth from that of core/active-shell nanoparticles. The upconversion emissions of Yb3+-doped-active-shell nanoparticles are more easily affected by phonons than those nanoparticles coated with inert layer. Yb3+ ions in the shell paly an important role of bridging the iner and outer factors to influence upconversion emission. |
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| Keywords: | upconversion temperature dependence energy state population rare earth |
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