LAUSR

Abstract A series of Ca(Ti1−xZrx)O3:Dy3+ phosphors were fabricated using a combustion method. The lattice structure, morphological features, and luminescence performances of the specimens were obtained. Rietveld refinement of the XRD patterns confirmed the crystal distortion of CaTiO3 after Zr4+codoping and the positional occupation of Zr4+ in the CaTiO3 crystal lattice. The photoluminescence spectroscopy results indicated that the fluorescence emission intensity of CaTiO3:Dy3+ was substantially enhanced by Zr4+ codoping and that the optimum doping concentration of Zr4+ was 40% mol. The quantum yield of the Ca(Ti0·6Zr0.4)O3:Dy3+ phosphor was measured to be 9.9%, and its fluorescence lifetime decreased with the increasing concentration of Zr4+ doping. Furthermore, the lowest color temperature was observed for Ca(Ti0·6Zr0.4)O3:Dy3+ among the investigated phosphors and its color coordinate was the closest to the standard white-light color coordinate. These results suggest that the Ca(Ti0·6Zr0.4)O3:Dy3+ phosphor excited by near-ultraviolet light is a potential material for application in white light-emitting diodes.