The synthesis and the luminescence properties of Sr2Ga3La1-xDyxGe3O14

A series of Sr2Ga3La1-xDyxGe3O14 (x = 0, 0.015, 0.03, 0.045, 0.06, 0.075, 0.09) phosphors were synthesized by high temperature solid state reactions. X-ray diffraction analysis proves that single-phase Sr2Ga3La1-xDyxGe3O14 (0 <= x <= 0.09) has been obtained. The particle size of these powders is in the range from 1 to 3 mu m. The host Sr2Ga3LaGe3O14 emits blue white light under the excitation of 260 nm ultraviolet light. Dy3+ doped samples can be effectively excited with near ultraviolet light and exhibit two emission bands in the blue (F-4(9/2) -> H-6(15/2)) and yellow regions (F-4(9/2) -> H-6(13/2)), which can form white light. Present research indicates that Dy3+ doped Sr2Ga3LaGe3O14 have the potential to be a single-phase full-color emitting phosphor.