Preparation and luminescent characteristics of an oxide phosphor Gd3Ga5O12 : Ag

A composite oxide material Gd 3 Ga 5 O 12 :Ag was prepared by solid state reaction. The composition and the crystallinity of phosphor were determined by X\|ray diffraction. The thin film electroluminescence (EL) devices based on Gd 3 Ga 5 O 12 :Ag were prepared by electron beam evaporation. We have obtained a good UV\|blue EL emission with a peak at 397?nm and a shoulder at 467?nm. The EL peaks located at 397 and 467?nm are found to originate from the oxide vacancies and 4d\+95s\+0 to 4d 10 of Ag\++, respectively.