Photoluminescence Properties of NaLa(WO4)2:Tb3+ Novel Green Phosphors Prepared by the Combustion Method
A series of NaLa(WO4)2:Tb3+ green phosphors have been prepared by a facile combustion method. X-ray powder diffraction (XRD) and photoluminescence were used to characterize the structure and luminescence properties of as-synthesized phosphors, respectively. The XRD results confirm that the as-synthesized phosphors exhibit sheelite-type structure without any impurity phase. The excitation band of the phosphors covers a wide region of 200-300 nm. The as-obtained phosphors emit strong green light centered at 546 nm under ultraviolet light excitation (261 nm). The results show that the optimum temperature is 800°C and the optimum concentration of Tb3+-dopant is 50 at%.
X. H. Qian et al., "Photoluminescence Properties of NaLa(WO4)2:Tb3+ Novel Green Phosphors Prepared by the Combustion Method", Materials Science Forum, Vol. 694, pp. 513-517, 2011