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Synthesis and enhanced luminescence properties of double perovskite NaLa0.95−xYxEu0.05MgWO6 phosphors

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Abstract

Double perovskite Na(La, Y)MgWO6:Eu3+ phosphors were obtained by the sol–gel method. X-ray diffractometer (XRD) patterns, scanning electron microscopy (SEM) images and photoluminescence properties were carried out to study the effect of polyethylene glycol (PEG). Enhanced optical properties were obtained by adding 3 wt% PEG under the excitation of 395 nm. Y3+ with smaller radius was selected to substitute La3+ in this host to decrease the symmetry and further enhance the luminescence properties. With Y3+ concentration increasing, Na2WO4 and Y30W8O69 phases came up. The emission spectra showed different shapes, and the emission intensity was enhanced by doping Y3+. Under the excitation of 395 and 465 nm, the emission intensity reached the maximum. The Commission Internationale de L’Eclairage (CIE) coordinates of the phosphors were on the edge of the CIE diagram, illustrating that this double perovskite phosphor showed good color purity. Above luminescence properties showed that the synthesized phosphors had great potential in solid-state lighting.

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Acknowledgements

This work was financially supported by the Opening Project of State Key Laboratory of High-Performance Ceramics and Superfine Microstructure (No. SKL201309SIC).

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Authors and Affiliations

  1. Nanjing Center, China Geological Survey, Nanjing, 210016, China

    Jing Zhang, Jia-Lin Shen & Nai-Cen Xu

  2. Supervision and Testing Center of East China, Mineral Resources of the Ministry of Land and Resources, Nanjing, 210016, China

    Jing Zhang, Jia-Lin Shen & Nai-Cen Xu

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  1. Jing Zhang
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  2. Jia-Lin Shen
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Correspondence to Jia-Lin Shen.

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Zhang, J., Shen, JL. & Xu, NC. Synthesis and enhanced luminescence properties of double perovskite NaLa0.95−xYxEu0.05MgWO6 phosphors. Rare Met. 39, 895–901 (2020). https://doi.org/10.1007/s12598-019-01233-2

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  • DOI: https://doi.org/10.1007/s12598-019-01233-2

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