Preparation and luminescence properties of YAG:Ce phosphor for white LED application via a vacuum sintering method

Authors

  • Hongling Shi,

    1. Department of Physics, Renmin University of China, Beijing, P.R. China
    2. Key Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P.R. China
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  • Jian Chen,

    1. Key Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P.R. China
    2. University of Chinese Academy of Sciences, Beijing, P.R. China
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  • Jiquan Huang,

    1. Key Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P.R. China
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  • Qianqian Hu,

    1. Key Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P.R. China
    2. University of Chinese Academy of Sciences, Beijing, P.R. China
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  • Zhonghua Deng,

    1. Key Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P.R. China
    2. University of Chinese Academy of Sciences, Beijing, P.R. China
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  • Yongge Cao,

    1. Department of Physics, Renmin University of China, Beijing, P.R. China
    2. Key Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, P.R. China
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  • Xuanyi Yuan

    Corresponding author
    1. Department of Physics, Renmin University of China, Beijing, P.R. China
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Abstract

YAG:Ce phosphors are synthesized by the vacuum sintering method, and their crystal structure, luminescence properties, and X-ray photoelectron spectroscopy are discussed. The synthesized temperature of pure YAG phase is reduced by vacuum sintering. As-synthesized YAG:Ce phosphors show a smaller average size of about 1 μm due to the fine starting materials, low sintering temperature, and the absence of flux. It is found that samples synthesized by the vacuum sintering method show stronger emission intensity and higher optimized Ce3+-doping concentration. In addition, white light-emitting diodes (LEDs) with improved color-rendering properties are obtained by using modified Pr3+-doped YAG:Ce phosphors.

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