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Synthesis and Luminescence of BaWO4:Ln3+ (Ln = Eu, Tb, and Dy) Powders

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BaWO4:Ln3+ powders were synthesized by a solid-state reaction method. The BaWO4:Ln3+ samples were characterized by x-ray powder diffraction (XRD) analysis, scanning electron microscopy (SEM), and luminescence spectroscopy. The XRD patterns reveal that the BaWO4:Ln3+ samples present pure tetragonal scheelite structure. The SEM observations demonstrate that the BaWO4:Ln3+ powders are irregular particles with size in the range of micrometers. The excitation spectra of the BaWO4:Ln3+ samples show the broad absorption band originating from charge transfer between oxygen ligands and the central tungstate ions inside WO 2−4 groups in the metal tungstate. The emission spectra of the BaWO4:Ln3+ samples display the bands associated to the anion molecular complex (WO 2−4 ) and the ff transitions of Ln3+. According to the emission spectra and the chromaticity coordinates (Commission internationale de l'éclairage, CIE), one can see that the BaWO4:Eu3+, BaWO4:Tb3+, and BaWO4:Dy3+ samples show emission in the red, green, and yellow region, respectively. The results show that the luminescence color can be altered by changing the Ln3+ doping in BaWO4 material.

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Acknowledgements

This work is supported financially by the Natural Science Foundation of China (Grant No. 51108113), the Fundamental Research Funds for the Central Universities (HEUCF130214), and the Study on the Safety of High-Rise Buildings under Construction with Complex Geological and Meteorological Conditions (CSCEC4B-2013-KT-16).

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Correspondence to Xiaoyu Sun.

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Sun, X., Sun, X., Li, X. et al. Synthesis and Luminescence of BaWO4:Ln3+ (Ln = Eu, Tb, and Dy) Powders. J. Electron. Mater. 43, 3534–3538 (2014). https://doi.org/10.1007/s11664-014-3215-1

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  • DOI: https://doi.org/10.1007/s11664-014-3215-1

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