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Breakdown of Crystallographic Site Symmetry in Lanthanide-Doped NaYF4 Crystals

Authors

  • Dr. Datao Tu,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
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  • Dr. Yongsheng Liu,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
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  • Dr. Haomiao Zhu,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
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  • Renfu Li,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
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  • Dr. Liqin Liu,

    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
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  • Prof. Dr. Xueyuan Chen

    Corresponding author
    1. Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
    • Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002 (China)
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  • We thank Prof. Ning Ye for helpful discussion about the crystallographic site symmetry in α- and β-NaYF4. This work is supported by the NSFC (Nos. 10974200, 11204302, 51102234, and 51002151), the 863 program of MOST (No. 2011AA03A407), and the NSF of Fujian Province for Young Scientists (Nos. 2010J05126, 2011J05145, and 2012J05106).

Abstract

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High-resolution photoluminescence spectroscopy employing Eu3+ as the structural probe unambiguously revealed a universal breakdown of crystallographic site symmetry in lanthanide-doped disordered crystals. The spectroscopic site symmetries of Eu3+ descend from crystallographic Oh to Cs (or C2) in α-NaYF4, and from crystallographic C3h to Cs in β-NaYF4, which were further verified by crystal-field level fitting.

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