Luminescence studies on lanthanide ions (Gd 3+ , Tb 3+ ) doped YAG:Ce phosphors by combustion synthesis

YAG:Ce,RE (RE:Gd 3+ ;Tb 3+ ) phosphors have been synthesized by combustion synthesis employing glycine-urea fuels at 500 0 C. Crystal structures, luminescent properties of the phosphors are analyzed. XRD study of polycrystalline powder shows the formation of YAG phase at low temperature. The emission spectra of phosphors shows gradual shift towards longer wavelength with the increase of doping concentration of Gd 3+ /Tb 3+ ion. However co-doping results in significant decrease in the emission intensity.