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Preparation of dispersed submicron YAG:Ce3+ phosphors via the molten salt method

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Abstract

Nano Ce-doped yttrium aluminum garnet (YAG:Ce) phosphor precursor was synthesized using the urea precipitation method, and dispersed submicron YAG:Ce phosphor was prepared using the molten salt method, with fine particle NaCl acting as the salt source. The effects of NaCl particle size on the mixing homogeneity of raw materials, particle morphology, dispersity, and luminescent properties of YAG phosphor were investigated. We found that the mixing homogeneity improved dramatically with a fine (2 µm) NaCl particle. Agglomeration and sintering of the phosphor were significantly reduced, and 200 nm dispersed YAG phosphor can be obtained at 1000 °C. The YAG phosphor obtained with fine NaCl salt also exhibits excellent luminous performance. The YAG phosphor blue light absorption ratio is 38%, and the internal quantum efficiency is 93%. The internal quantum efficiency is superior to YAG phosphors synthesized using commercial large-particle NaCl. These findings provide a new idea for preparing dispersed inorganic powder with fine particle size using the molten salt method.

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Acknowledgements

This work was supported by the Natural Science Foundation for Distinguished Young Scholar of the Jiangsu Province (BK20160073).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Southeast University, Sipailou 2#, Nanjing, 210096, Jiangsu, People’s Republic of China

    Li Song, Yan Dong, Qiyue Shao & Jianqing Jiang

  2. Nanjing Forestry University, Nanjing, People’s Republic of China

    Jianqing Jiang

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  1. Li Song
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  2. Yan Dong
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  3. Qiyue Shao
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Correspondence to Yan Dong.

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Song, L., Dong, Y., Shao, Q. et al. Preparation of dispersed submicron YAG:Ce3+ phosphors via the molten salt method. J Mater Sci: Mater Electron 29, 5761–5767 (2018). https://doi.org/10.1007/s10854-018-8547-9

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  • DOI: https://doi.org/10.1007/s10854-018-8547-9

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