Luminescent properties of SrAl2O4: Eu, Dy material prepared by the gel method

SrAl2O4:Eu,Dy materials were first prepared by the gel method. Compared with samples prepared by solid state reactions, the grain size of the gel method is greatly reduced to nanometer grade. A clear blue shift occurs in the excitation and emission spectra of nano SrAl2O4:Eu,Dy, of which the peak of the excitation and emission spectra are at 323 and 500 nm respectively. The brightness of nano SrAl2O4:Eu,Dy is greatly reduced. The blue shift and the change of luminescent intensity in nano SrAl2O4:Eu,Dy materials can be attributed to the effect of surface energy.