We synthesized a series of YPO₄:Ce³⁺/Tb³⁺/Eu³⁺ phosphors by a solid state reaction. All of phosphors have asingle phase, showing that the doping ions could not change the phase of YPO₄ host. The emission intensities of Ce³⁺,Tb³⁺ and Eu³⁺ ions clearly depend on the Tb³⁺ concentrations in YPO4:Ce3þ/Tb3þ/Eu3þphosphors. Theemission intensity of Ce³⁺ emission decreases gradually but the emission intensity of Eu³⁺ emission increasescontinuously with the increasing Tb³⁺ concentration because of the energy transfer from Ce³⁺ to Eu³⁺ through Tb³⁺. On the basis of the luminescent properties of YPO₄:Ce³⁺/Tb³⁺/Eu³⁺ phosphors, the possible energy transfermechanism was speculated.