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Color-tunable luminescence properties of Sm3+/Dy3+ co-doped NaLa(MoO4)2 phosphors and their energy transfer mechanism

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Abstract

The Sm3+, Dy3+ doped and Sm3+/Dy3+ co-doped NaLa(MoO4)2 spherical phosphors were hydrothermally synthesized by the EDTA-2Na mediated method. Under the excitation of 297 nm, the quenching concentration of Sm3+ in NaLa(MoO4)2 host was determined to be 13%, and the concentration quenching mechanism was discussed to be the electric quadrupole–quadrupole interaction. After Sm3+ and Dy3+ ions were co-doped into the NaLa(MoO4)2 host, the energy transfer behaviors resulted from Dy3+ to Sm3+ ions were investigated by the help of the luminescent spectra of the obtained phosphors. By varying co-doping concentrations of Sm3+/Dy3+ ions, the emission color of NaLa(MoO4)2:Sm3+/Dy3+ can be tuned from reddish-orange, pink and white to bluish-green. The CIE chromaticity coordinate, the correlated color temperature and the quantum efficiency of NaLa0.87(MoO4)2:1%Sm3+, 12%Dy3+ were calculated to be (0.356, 0.320), 4353 K and 20%, respectively. Furthermore, in the temperature-dependent analysis, it presented good thermal stability, which can become a promising single-phased white-emitting phosphor for white LEDs devices. Based on these results, the possible energy transfer mechanism between Dy3+ and Sm3+ in NaLa(MoO4)2:Sm3+/Dy3+ was also proposed.

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Acknowledgements

This work was financially supported by the National Basic Research Program of China (2010CB732300).

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Authors and Affiliations

  1. Research Institute of Applied Catalysis, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai, 201418, People’s Republic of China

    Lingzhan Kong, Xiuzhen Xiao, Jun Yu, Dongsen Mao & Guanzhong Lu

  2. Key Laboratory for Advanced Materials and Research Institute of Industrial catalysis, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People’s Republic of China

    Guanzhong Lu

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  1. Lingzhan Kong
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  2. Xiuzhen Xiao
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Correspondence to Xiuzhen Xiao or Guanzhong Lu.

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Kong, L., Xiao, X., Yu, J. et al. Color-tunable luminescence properties of Sm3+/Dy3+ co-doped NaLa(MoO4)2 phosphors and their energy transfer mechanism. J Mater Sci 52, 6310–6321 (2017). https://doi.org/10.1007/s10853-017-0863-6

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  • DOI: https://doi.org/10.1007/s10853-017-0863-6

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