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Understanding Enhanced Upconversion Luminescence in Oxyfluoride Glass-Ceramics Based on Local Structure Characterizations and Molecular Dynamics Simulations
Ali, Mohamed A.; Ren, Jinjun; Liu, Xiaofeng; Qiao, Xvsheng; Qiu, Jianrong; qjr@scut.edu.cn
2017
Source PublicationJ. Phys. Chem. C
Volume121Issue:28Pages:15384
AbstractIn 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.
SubtypeArticle
Department材料
DOI10.1021/acs.jpcc.7b04599
Funding OrganizationNational 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 ; 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 ; 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 ; 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
Indexed BySCI
Funding OrganizationNational 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 ; 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 ; 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 ; 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 IDWOS:000406355700045
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Document Type期刊论文
Identifierhttp://ir.siom.ac.cn/handle/181231/28216
Collection中科院强激光材料重点实验室
Corresponding Authorqjr@scut.edu.cn
Affiliation中国科学院上海光学精密机械研究所
Recommended Citation
GB/T 7714
Ali, Mohamed A.,Ren, Jinjun,Liu, Xiaofeng,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 Ali, Mohamed A.,Ren, Jinjun,Liu, Xiaofeng,Qiao, Xvsheng,Qiu, Jianrong,&qjr@scut.edu.cn.(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 Ali, Mohamed A.,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.
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