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首页> 外文期刊>Science of advanced materials >Dual Emission in Multiphase SiO2-SnO2-LaF3 Nanostructured Glass-Ceramics for Simultaneous UV and NIR Solar Spectrum Conversion
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Dual Emission in Multiphase SiO2-SnO2-LaF3 Nanostructured Glass-Ceramics for Simultaneous UV and NIR Solar Spectrum Conversion

机译：用于同时进行UV和NIR太阳光谱转换的多相SiO2-SnO2-LaF3纳米结构玻璃陶瓷中的双发射

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摘要

We have synthesized rare earth-doped SnO2-LaF3 nanostructured silica glass-ceramics by thermal treatment of precursor sol-gel glasses. The precipitation of LaF3 and SnO2 nanocrystals during ceramming process was confirmed by X-ray diffraction, HRTEM images, and spectroscopic analysis. Doping these samples with Sm3+-Ho3+-Yb3+ ions provides them with the possibility of yielding simultaneous efficient UV-and NIR-to-visible photon conversion. Down-shifting from the UV is obtained by energy transfer from SnO2 quantum dots to the Sm3+ ions partitioned into these nanocrystals. Up-conversion from NIR excitation is obtained by sequential energy transfer from Yb3+ to Ho3+ ions in LaF3 nanocrystals, favored by the low phonon energy of this host. These results would be of interest in improving the spectral response of photovoltaic solar cells.
机译：我们已经通过前体溶胶凝胶玻璃的热处理合成了掺稀土的SnO2-LaF3纳米结构的石英玻璃陶瓷。 X射线衍射，HRTEM图像和光谱分析证实了在陶瓷化过程中LaF3和SnO2纳米晶体的沉淀。用Sm3 + -Ho3 + -Yb3 +离子掺杂这些样品可以使它们同时产生有效的UV-和NIR-可见光转换。通过将能量从SnO2量子点转移到分配到这些纳米晶体的Sm3 +离子中，可以实现从UV的下移。通过在LaF3纳米晶体中从Yb3 +离子到Ho3 +离子的顺序能量转移，可以得到NIR激发的上转换，这是由于该主体的低声子能量所致。这些结果在改善光伏太阳能电池的光谱响应方面将是令人感兴趣的。

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