Investigation of the Luminescent Properties of Tb[sup 3+]-Substituted YAG:Ce, Gd Phosphors

Generation of white light closer to daylight with good color-rendering index properties can be achieved with the proper combination of emissions from the phosphor system consisting of semiconductor diode and -doped yttrium aluminum garnet (YAG: Ce, Gd). Here, we report crystal structure and luminescent properties of -substituted YAG: Ce, Gd. The values of lattice constant increases and the photoluminescent spectrum shows red emission shift, as the content increases in YAG. We also studied luminescent properties of these phosphors using vacuum ultraviolet excitation for future plasma display panel applications. We propose a possible mechanism for the energy migration from YAG host to and ions.