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Hydrothermal preparation and white up-conversion luminescence of NaGd(WO4)2:Yb3+/Pr3+ microcrystals

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Abstract

NaGd(WO4)2:Yb3+/Pr3+ microcrystals with different doping concentration of Pr3+ ions have been synthesized by a facile hydrothermal method followed by a subsequent heat treatment process. The structures, morphologies and up-conversion luminescent properties of the as-prepared NaGd(WO4)2:Yb3+/Pr3+ microcrystals were investigated by X-ray diffraction, scanning electron microscopy and photoluminescence spectra. Under the excitation with a 980 nm diode laser, intense red and blue emissions along with some weak emissions in green and yellow regions were observed. The main emission bands of the samples are assigned to 3P0 → 3H4, 1I6 + 3P1 → 3H5, 3P0 → 3H5, 1I6 + 3P1 → 3H6, 1D2 → 3H4, 3P0 → 3H6, 3P0 → 3F2, 1D2 → 3H5, 3P0 → 3F3, and 3P0 → 3F4 transitions of Pr3+ ions. Concentration quenching appears as the Pr3+ ions doping content up to 0.3 mol%. The International Commission on Illumination (CIE) chromaticity coordinates are close to those of the standard illuminant F3 (0.409, 0.394) which reprents white fluoresence. The as-prepared microcrystals might find potential applications in fields such as phosphor powders, infrared detection and display devices.

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Acknowledgments

This work was supported by the grant of Specially-Appointed Professor of Jiangsu and the National Science Foundation of China under Grant Nos. 11474167, 51472123 and 51502142. It is also sponsored by National Training Program for Undergraduate on Innovation of Jiangsu Province (201310300059Y).

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Correspondence to Weifeng Rao.

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Zhu, Q., Miao, J., Wen, Y. et al. Hydrothermal preparation and white up-conversion luminescence of NaGd(WO4)2:Yb3+/Pr3+ microcrystals. J Mater Sci: Mater Electron 28, 3048–3051 (2017). https://doi.org/10.1007/s10854-016-5891-5

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  • DOI: https://doi.org/10.1007/s10854-016-5891-5

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