UV Luminescence Property of YPO₄:RE (RE = Ce³⁺, Tb³⁺)

Blue-emitting YPO 4:Ce 3+ and green-emitting YPO 4:Tb 3+ and YPO 4:Ce 3+,Tb 3+ phosphor particles were synthesized by coprecipitation method. Their structure and micromorphology have been analyzed by X-ray powder diffraction (XRD), FTIR spectra, and scanning electronic microscope (SEM). The transitions of Ce 3+ 5d−4f and Tb 3+ 5 D 4 − 7 F J ( J = 6−3) were detected, and the photoluminescence intensity of the Tb 3+ increased on increasing the concentration of Ce 3+ . Finally, the energy-transfer process from Ce 3+ to Tb 3+ was investigated in YPO 4:Ce 3+,Tb 3+ nanoparticles in detail. These nanoparticles can be potentially used as labels for biological molecules.