Dy$^{3+}$-activated M$_2$SiO$_4$ (M $=$ Ba, Mg, Sr)-type phosphors

[摘要] The alkaline orthosilicates of M$_2$SiO$_4$ (M $=$ Ba, Mg, Sr) activated with Dy$^{3+}$ and co-doped with Ho$^{3+}$ are prepared through conventional solid-state method, i.e., mixing and grinding of solid form precursors followedby 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 luminescenceproperties. The thermal behaviours of well-mixed samples were determined by differential thermal analysis (DTA)/thermogravimetry (TG). The PL spectra show that the 478 and 572nm maximum emission bands are attributed, respectively, to ${}^{4}$F$_{9/2}$ $o$ ${}^{6}$H$_{15/2}$ and ${}^{4}$F$_{9/2}$ $o$ ${}^{6}$H$_{13/2}$ transitions of Dy$^{3+}$ ions.

[学科分类] 材料工程

[关键词] Alkaline orthosilicate;solid-state reaction method;open atmosphere;luminescence;rare-earth ions.