Understanding Enhanced Upconversion Luminescence in Oxyfluoride Glass-Ceramics Based on Local Structure Characterizations and Molecular Dynamics Simulations

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 中科院强激光材料重点实验室

	Understanding Enhanced Upconversion Luminescence in Oxyfluoride Glass-Ceramics Based on Local Structure Characterizations and Molecular Dynamics Simulations
	Qiao, Xvsheng; Ali, Mohamed A.; Ren, Jinjun; Liu, Xiaofeng; Qiu, Jianrong
刊名	J. Phys. Chem. C
	2017
卷号	121 期号:28 页码:15384
通讯作者	qjr@scut.edu.cn
英文摘要	In this Article, large enhancement in upconversion (UC) luminescence was verified in a transparent aluminosilicate glass-ceramics (GCs) containing CaF2 nanocrystals (NCs) codoped with Era(3+) and Yb3+ ions. On the basis of the joint spectroscopic and structural characterizations, we suggest that the precipitation of fluoride NCs is correlated with the preexistence of the fluoride-rich domains in the as-melt glass, which is supported by scanning transmission electron microscopy (STEM) and reproduced by molecular dynamics (MD) simulation. The precipitation of the fluoride NCs starts from a phase-separated as-melt glass consisting of fluorine-rich and oxygen-rich domains, while the spatial distribution of rare earth (RE) ions and the vibration energies of the bonds connecting RE ions remain almost unchanged after crystallization. In the GCs, both the fluoride domain and the oxygen-containing polyhedrons surrounding RE ions experience significant ordering, which may affect the UC emission for both glasses and GCs. We therefore attribute the enhanced UC emissions of the GCs to the long-range structural ordering and the change of site symmetry surrounding RE ions, rather than the preference of RE ions in migrating from fluoride-rich phase to the fluoride NCs. Our results may have strong implications for a better understanding of the enhanced UC emission in similar oxyfluoride GCs.
收录类别	SCI
资助信息	National Natural Science Foundation of China [61475047, 11504323]; State Key Laboratory of Precision Spectroscopy (East China Normal University); State Key Laboratory of High Field Laser Physics (Shanghai Institute of Optics and Fine Mechanics); Science and Technology Department of Zhejiang Province [2015C31045]; Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques; South China University of Technology
WOS记录号	WOS:000406355700045
内容类型	期刊论文
源URL	[http://ir.siom.ac.cn/handle/181231/28216]
专题	上海光学精密机械研究所_中科院强激光材料重点实验室
作者单位	中国科学院上海光学精密机械研究所
推荐引用方式 GB/T 7714	Qiao, Xvsheng,Ali, Mohamed A.,Ren, Jinjun,et al. Understanding Enhanced Upconversion Luminescence in Oxyfluoride Glass-Ceramics Based on Local Structure Characterizations and Molecular Dynamics Simulations[J]. J. Phys. Chem. C,2017,121(28):15384.
APA	Qiao, Xvsheng,Ali, Mohamed A.,Ren, Jinjun,Liu, Xiaofeng,&Qiu, Jianrong.(2017).Understanding Enhanced Upconversion Luminescence in Oxyfluoride Glass-Ceramics Based on Local Structure Characterizations and Molecular Dynamics Simulations.J. Phys. Chem. C,121(28),15384.
MLA	Qiao, Xvsheng,et al."Understanding Enhanced Upconversion Luminescence in Oxyfluoride Glass-Ceramics Based on Local Structure Characterizations and Molecular Dynamics Simulations".J. Phys. Chem. C 121.28(2017):15384.