Abstract
A series of double perovskite (Gd1−xTbx)2MgTiO6 (x = 0.01, 0.05, 0.1, 0.15, 0.2, 0.3 and 0.4) phosphors were successfully synthesized by solid-state reaction method. The A-site in the host is occupied by two Gd3+ ions, which facilitates the doping of Tb3+ ions. The crystal structure, morphology and luminescence performance were evaluated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, photoluminescence and calculation of CIE color coordinates. A weak emission peak (5D4–7F6, 490 nm) and a strong emission peak (5D4–7F5, 545 nm) existed in the emission spectra under 313 nm excitation. The quenching concentration of Tb3+ reached up to 20.0 mol% was observed in Gd1.8Tb0.2MgTiO6 phosphors. In order to explore the potential application of Gd2−2xMgTiO6:xTb3+ phosphors in white LED solid-state lighting, the fluorescence decay curves and thermal stability were carried out.
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Acknowledgements
The authors acknowledge the generous financial support from National Pre-research Foundation of China (6140208010201 and 61402080104), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Research and Innovation Program for College Graduates of Jiangsu Province (KYCX17_0970) and the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP, PPZY2015B128).
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Xie, J., Ding, N., Li, X. et al. Luminescence properties of double perovskite Gd2MgTiO6:Tb3+ phosphors by solid-state reaction method. J Mater Sci: Mater Electron 30, 17923–17932 (2019). https://doi.org/10.1007/s10854-019-02146-7
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DOI: https://doi.org/10.1007/s10854-019-02146-7