| 六角相NaYF4纳米粒子的合成及粒子尺寸对Tb3+,Er3+下转换效率的影响 |
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| 引用本文： | 王鹏程,刘春旭,赵海峰,骆永石,王立军.六角相NaYF4纳米粒子的合成及粒子尺寸对Tb3+,Er3+下转换效率的影响[J].发光学报,2012,33(10):1068-1073. |
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| 作者姓名： | 王鹏程 刘春旭 赵海峰 骆永石 王立军 |
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| 作者单位： | 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;中国科学院大学 |
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| 基金项目： | 国家自然科学基金(61077025,10904140,10774142,60308008)资助项目 |
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| 摘 要： | 采用热溶剂法制备了NaYF4∶Tb3+,Er3+六角相纳米粒子,分析了合成条件对六角相粒子形成的影响。较高的反应温度有利于六角相NaYF4晶体的形成。实验结果表明:六角相是热力学更稳定和更有序的结构,从立方相到六角相的转变是从无序到有序结构的转变。随着尺寸的减小,纳米粒子的下转换效率明显降低。为进一步比较,制备了NaYF4∶Tb3+,Er3+核壳结构的纳米粒子。包覆后的纳米粒子的下转换效率明显提高,其原因是包覆减少了表面缺陷进而降低了表面激发能量的猝灭。
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| 关 键 词： | 六角相 纳米粒子尺寸 核壳结构 转换效率 |
| 收稿时间： | 2012/6/1 |
Synthesis of Hexagonal NaYF4 Nanoparticles and Its Particle Size Effect on Conversion Efficiency of Tb3+,Er3+ Couples |
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| WANG Peng-cheng,LIU Chun-xu,ZHAO Hai-feng,LUO Yong-shi,WANG Li-jun.Synthesis of Hexagonal NaYF4 Nanoparticles and Its Particle Size Effect on Conversion Efficiency of Tb3+,Er3+ Couples[J].Chinese Journal of Luminescence,2012,33(10):1068-1073. |
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| Authors: | WANG Peng-cheng LIU Chun-xu ZHAO Hai-feng LUO Yong-shi WANG Li-jun |
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| Institution: | 1(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 100039,China) |
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| Abstract: | Nanoparticles NaYF4∶Tb3+,Er3+ with hexagonal phase were synthesized by hot solvent method and the influences of synthesis conditions on the formation and size of particles were also analyzed.The reaction temperature is the dominate condition.The results confirm that some conclusions that the hexagonal phase is thermodynamically more stable and a more orderly structure.It is found that with the nano-size decreasing,the conversion efficiency is significantly reduced.NaYF4∶Tb3+,Er3+ nanoparticles with core/shell structure were prepared to analyze and compare further.It is indicated that the luminescence of the NaYF4∶Tb3+,Er3+ particles with core/shell structure were enhanced significantly due to the reduced surface defects and the suppressed excitation energy quench. |
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| Keywords: | hexagonal phase nanoparticle size core/shell structure conversion efficiency |
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