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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Upconversion properties of a transparent Er3+-Yb3+ co-doped LaF3-SiO2 glass-ceramics prepared by sol-gel method
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Upconversion properties of a transparent Er3+-Yb3+ co-doped LaF3-SiO2 glass-ceramics prepared by sol-gel method

机译：溶胶-凝胶法制备的透明Er3 + -Yb3 +共掺杂LaF3-SiO2微晶玻璃的上转换性能

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摘要

Transparent 0.1ErF(3)-0-1YbF(3)-5LaF3-94.8SiO(2) (mol%) glass-ceramics was prepared by sol-gel method. Efficient upconversion emissions at 379, 407, 450, 490, 520, 540 and 660 nm were observed under 973 nm excitation. The signal at 379 nm is only similar to4.5 times weaker than the signal at 520 nm, that is readily visible by the naked eyes even with a pump power of similar to27 mW, indicating that this sample is a very good infrared-to-ultraviolet upconverter. The data obtained from transmission electron microscopy and X-ray diffraction studies indicate that the rare-earth ions were partitioned in the low phonon energy LaF3 nanocrystals embedded in silica glass. The analysis of the dynamics of the upconversion emissions from level S-4(3/2) (similar to540 nm) and level F-4(9/2) (similar to660 nm) of Er3+ suggest that distinct energy transfer excitation pathways are responsible for populating these luminescent levels. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 25]
机译：通过溶胶-凝胶法制备了透明的0.1ErF（3）-0-1YbF（3）-5LaF3-94.8SiO（2）（mol％）玻璃陶瓷。在973 nm激发下观察到379、407、450、490、520、540和660 nm处的有效上转换发射。 379 nm处的信号仅比520 nm处的信号弱4.5倍，即使泵浦功率接近27 mW，肉眼也可以轻易看到，这表明该样品具有非常好的红外至紫外线上变频器。从透射电子显微镜和X射线衍射研究获得的数据表明，稀土离子分配在嵌入石英玻璃的低声子能LaF3纳米晶体中。对Er3 +的S-4（3/2）级（类似于540 nm）和F-4（9/2）级（类似于660 nm）的上转换发射的动力学分析表明，不同的能量转移激发途径是负责的用于填充这些发光水平。 （C）2003 Elsevier Science B.V.保留所有权利。 [参考：25]

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