Preparation and photoluminescence of a phosphor SrMoO4:Dy3+

Trivalent dysprosium ion (Dy3+) activated strontium molybdate (SrMoO4) phosphor was synthesized via solid-state reaction in a weak reductive atmosphere of active carbon. The effects of the sintering temperature, the activator concentration and the different fluxes on the luminescence properties were investigated by thermogravimetry-derivative thermogravimetry, X-ray diffraction and photoluminescence spectroscopy, respectively. The excitation and emission spectra indicate that this phosphor can be effectively excited by near UV light of 387 nm, and it exhibits a bright yellow emitting. The optimum concentration for Dy3+ is 4%. The results indicate that SrMoO4:Dy3+ may be a potential luminescent material for solid-state lighting applications.