Dy3+-activated M2SiO4 (M = Ba, Mg, Sr)-type phosphors

The alkaline orthosilicates of M2SiO4 (M = Ba, Mg, Sr) activated with Dy3+ and co-doped with Ho3+ are prepared through conventional solid-state method, i.e., mixing and grinding of solid form precursors followed by high-temperature heat treatments of several hours in furnaces, generally under open atmosphere and investigated by X-ray diffraction (XRD) to get phase properties and photoluminescence (PL) analysis to get luminescence properties. The thermal behaviours of well-mixed samples were determined by differential thermal analysis (DTA)/thermogravimetry (TG). The PL spectra show that the 478 and 572 nm maximum emission bands are attributed, respectively, to 4F9/2 → 6H15/2 and 4F9/2 → 6H13/2 transitions of Dy3+ ions.