White light up-conversion in transparent sol–gel derived glass-ceramics containing Yb3+–Er3+–Tm3+ triply-doped YF3 nanocrystals
White light up-conversion in transparent sol–gel derived glass-ceramics containing Yb3+–Er3+–Tm3+ triply-doped YF3 nanocrystals
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DOI：
10.1016/j.matchemphys.2010.07.038
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发表时间：
2010-11
影响因子：
4.6
通讯作者：
A. Santana-Alonso;J. Méndez-Ramos;Á. C. Yanes;J. del-Castillo;V. D. Rodríguez
中科院分区：
文献类型：
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作者：
A. Santana-Alonso;J. Méndez-Ramos;Á. C. Yanes;J. del-Castillo;V. D. Rodríguez
首次采用溶胶-凝胶法制备了Yb 3 +-Er 3 +-Tm 3+三元共掺YF 3纳米晶透明微晶玻璃。X射线衍射和高分辨透射电子显微镜分析指出了YF 3纳米晶的析出。上转换发光特征证实了发光离子有效地分配到沉淀的纳米晶体中。相应的能量转移上转换机制和整体发光颜色的依赖性已被分析作为掺杂离子的函数，具有不同的浓度。特别地，已经实现了非常明亮和高效的上转换发射，几乎匹配标准色度图的标准等能量白色光照明点，显示出作为用于光子集成器件和红外可调谐磷光体的潜在应用的有希望的候选材料。
Transparent glass-ceramics containing YF3nanocrystals triply-doped with Yb3+–Er3+–Tm3+ions have been successfully obtained under adequate thermal treatment of precursor sol–gel glasses for the first time to our knowledge. X-ray diffraction and high resolution transmission electron microscopy analysis pointed out the precipitation of YF3nanocrystals. Up-conversion luminescence features confirm the effective partition of luminescent ions into precipitated nanocrystals. Corresponding energy transfer up-conversion mechanisms and the dependence of the overall emitting colour have been analyzed as a function of doping ions, with varying concentration. In particular, very bright and efficient up-conversion emission, almost matching the standard equal energy white light illumination point of the standard chromaticity diagram, has been achieved showing up as promising candidate material for potential applications in photonic integrated devices and infrared tuneable phosphors.