Synthesis and optical properties of P5+ co-doped Ba3SiO5:Eu2+ orange persistent phosphor

Abstract By co-doping the P 5+ ions into Ba 3 SiO 5 :Eu 2+ , we synthesized new orange persistent phosphor using cellulose assisted liquid phase precursor (LPP) method. The emission spectra showed a typically broad orange emission band centered at 575 nm attributed to the 4f 6 5d 1 → 4f 7 transition of Eu 2+ ions under 400 nm excitation source. The persistent luminescence property of Eu 2+ doped Ba 3 SiO 5 orange phosphor was enhanced by co-doping non-equivalent phosphorus ions into silicon sites. This enhancement can be explained by formation of the trapping center due to the charge compenstation. Consequently, the afterglow decay exhibited an orange emission for more than 5 min after irradiation at under 365 nm for 1 min.