Superfine Sr2CeO4:RE3+ (RE=Eu, Sm) phosphors were synthesized at relatively low temperature by a modified sol-gel method us-ing nitrates as raw materials, ethylenediaminetetraacetic acid (EDTA) as complexing agent. Single phase phosphors could be obtained at cal-cination temperature above 800 ℃ and pH value higher than 6.4 of initial solution. The as-prepared powders consisted of uniform crotch-like grains. The preparation process was monitored by thermogravimetric and differential thermal analysis (TG-DTA) and Raman spectra. The obtained products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS) and photohiminescence. Photoluminescence study indicated that strong energy transfer occurred between Eu3+/Sm3+ and host. The Sr2CeO4:RE3+ emission could be tuned from blue to white and red light by varying the concentration of RE3+. The strong emission and controllable light color are suitable for applications in advanced lighting and displaying fields.
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