Abstract
Series samples of Dy3+/Bi3+ co-doped Gd3Al5O12 phosphors were successfully prepared by sol–gel combustion method. The phase composition, morphology and luminescence properties were investigated by X-ray diffraction, scanning electron microscope, photoluminescence, UV–Vis diffuse reflectance spectra, and fluorescent decay curves. Dy3+–Bi3+ co-doping had no significant effect on the host lattice of Gd3Al5O12 (GAG). The quenching concentration of Dy3+ in Gd 3-x Al5O12:xDy3+ was determined to be 6.0 mol% (x = 0.06). At the optimal Dy3+ content of 6.0 mol%, the emission intensity of Dy3+ was greatly enhanced by Bi3+ co-doping. The incorporation of Bi3+ in GAG sample well improved the emission intensity of Dy3+ through the energy transfer from Bi3+ to Dy3+. The optimized composition was determined to be Gd2.895Al5O12:0.06Dy3+, 0.045Bi3+. The chromaticity coordinate shifted to green edge area after co-doping Bi3+ in GAG:Dy3+ phosphors. The enhanced intensity and tuned luminous color of Dy3+/Bi3+ co-doped GAG phosphors provided a promising application in white light emitting diodes (WLEDs), scintillation and some other optical fields.
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The authors acknowledge the generous financial support from Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) and National Natural Science Foundation of China (51402133) and (51202111).
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Tian, L., Wang, L., Zhang, L. et al. Enhanced luminescence of Dy3+/Bi3+ co-doped Gd3Al5O12 phosphors by high-efficiency energy transfer. J Mater Sci: Mater Electron 26, 8507–8514 (2015). https://doi.org/10.1007/s10854-015-3522-1
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DOI: https://doi.org/10.1007/s10854-015-3522-1