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Cerium ions(Ce3+)doped GdAlO3(GAP:Ce)phosphors,which show excellent yellow light emission and enhanced photoluminescence achieved by doping with either Li+-or Bi3+-ions,have been synthesized by using solid-state reaction method starting from nano-sized powders.The XRD patterns of either GAP:Ce,Lior GAP:Ce,Bi phosphors calcined at 1100℃ for 8 h in a reducing atmosphere confirms a pure orthorhombic perovskite phase.