Interaction of rare earth ions in Sr2MgSi2O7: Eu2+, Dy3+ material

To discuss the function of Eu and Dy and their interaction in Sr2MgSi2O7: Eu2+, Dy3+ long afterglow material, the Eu and Dy single doped and their co-doped Sr2MgSi2O7: Eu2+, Dy3+ were prepared. The samples were characterized by X-ray diffraction (XRD), decay curves, photoluminescence (PL), and thermoluminescence (TL). The results indicate that Sr2MgSi2O7: Eu has afterglow properties, and the doping of Eu ion in Sr2MgSi2O7: Eu2+, Dy3+ can lower the depth of traps. Eu ion can not only serve as luminescence center, but also produce traps in the matrix, meanwhile, it also exerts certain influences on the traps produced by Dy in Sr2MgSi2O7: Eu2+, Dy3+. The Dy ion can not act as luminescence center but relates to the change of the traps in the Sr2MgSi2O7 matrix.