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Tailorable Multicolor Up-conversion Emissions in Tm3+/Ho3+/Yb3+ Co-Doped LiLa(MoO4)2

Authors

  • Ting Li,

    1. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) in Shaanxi Province, National Photoelectric Technology and Functional Materials & Application of Science and Technology International Cooperation Base, Institute of Photonics & Photon-Technology and Department of Physics, Northwest University, Xi'an, China
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  • Chongfeng Guo,

    Corresponding author
    • National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) in Shaanxi Province, National Photoelectric Technology and Functional Materials & Application of Science and Technology International Cooperation Base, Institute of Photonics & Photon-Technology and Department of Physics, Northwest University, Xi'an, China
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  • Puju Zhao,

    1. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) in Shaanxi Province, National Photoelectric Technology and Functional Materials & Application of Science and Technology International Cooperation Base, Institute of Photonics & Photon-Technology and Department of Physics, Northwest University, Xi'an, China
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  • Lin Li,

    1. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) in Shaanxi Province, National Photoelectric Technology and Functional Materials & Application of Science and Technology International Cooperation Base, Institute of Photonics & Photon-Technology and Department of Physics, Northwest University, Xi'an, China
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  • Jung Hyun Jeong

    1. Department of Physics, Pukyong National University, Busan, Korea
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Author to whom correspondence should be addressed. e-mail: gcfzsu@yahoo.com.cn

Abstract

Using a modified sol–gel method, LiLa(MoO4)2: Tm3+/Ho3+/Yb3+ phosphors with tailorable up-conversion (UC) emission colors were prepared. Under the excitation of a 980 nm laser diode, up-conversion red and green emissions in Ho3+/Yb3+ co-doped and blue emission in Tm3+/Yb3+ co-doped LiLa(MoO4)2 were observed, respectively. The intensities of the RGB (red, green, and blue) emissions could be controlled by varying concentrations of Tm3+ or Ho3+, and the optimal composition was also determined. In Tm3+/Ho3+/Yb3+ co-doped LiLa(MoO4)2, the UC emission colors could be tuned from blue through white to yellow by adjusting the concentrations of Tm3+ or Ho3+. The UC excitation mechanisms were also investigated based on the power dependence of UC luminescence intensity.

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