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The phosphors of YBO3 co-activated with Sb3+ and Eu3+ were synthesized with solid state reaction method, and their vacuum ultraviolet (VUV) and ultraviolet (UV) excited photoluminescence propertied were studied with svnchrotron radiation instrument combined with spectrometer.The emission spectrum of YBO3:Sb3+.Eu3+ consisting of a broad emission band3 with peak at about 455 nm and several emission lines was observed bv exciting Sb3+ with 270 nm(1S0→ P13 transition).as dis(p)laved in Figure 1.