Ba₃Y1－x(PO₄)₃:xDy 3+ phosphors wer e synthesized by high temperature solid state reactions.The X-ray diffraction (XRD) indicates that the sample′s crystalline structure is a pure phase of Ba ₃Y(PO₄)₃.The main emission peaks are located at 486nm(⁴F9/2→⁶H15/2) and 575nm(⁴F9/2→⁶H13/ 2),which are the typical emission peaks of Dy³⁺,correspondi ng to blue and yellow emissions,respectively.The most intense emission is excited by 348nm.There are 8main excitation peaks,located at 292nm(⁶H15/2→⁴D 7/2),322nm(⁶H15/2→⁶P3/2),348nm(⁶H15/2→⁶P7/2),362nm(⁶H15/2→⁶P5/2),385nm(6H15/2→⁴M21/2), 424nm(⁶H15/2→⁴G11/2),452nm(⁶H15/2→⁴I15/2) and 473 nm(⁶H15/2→⁴F9/2).We stud y the effect of the doping concentration of Dy³⁺ activator on the luminescence properties and find the concentration quenching w hen x=0.08,and the mechanism of concentration quenching was dipole—dipole interaction.All of them are in the white region of the CIE diagrams.At the same time,we investigate the influence of sensitizer Ce³⁺ on the luminesc ent intensity of Ba₃Y(PO₄)₃:Dy³⁺.