Photoluminescence investigations of Y2O3: Eu phosphor co-doped with Ca

Y2O3:Eu3+ and Ca-doped Y2O3:Eu3+ luminescent particles have been synthesized via poly-ol method and subsequent annealing at 800°C. From powder X-ray diffraction pattern it is confirmed that Ca2+ ion gets incorporated into Y2O3 lattice. Photoluminescence properties of these samples are studied by luminescence excitation and emission spectra, decay curves, calculated Judd–Oflet parameters and quantum efficiency. The phosphor shows characteristic 5D0→7F1 (J = 1, 2, 3, 4) transition for Eu3+ corresponding to nearly reddish-orange color (CIE color coordinates x= 0.65, y = 0.34). Ca2+ ion doping effectively augments the Eu3+ lifetimes and quantum efficiency of Y2O3:Eu3+.