Preparation of spherical phosphor (Y, Gd)BO3:Eu by polymeric-aerosol pyrolysis

The red phosphor of (Y, Gd)BO3:Eu3+ was prepared by aerosol pyrolysis for plasma display panel applications through the polymeric reaction. in which citric acid and ethylene glycol were used as ion carriers, i.e., monomers. This synthetic route was adopted to enhance mechanical and optical characteristics of spherical phosphors. In particular, the phosphors synthesized with monomers showed quite different morphology and luminous efficiency compared to those without monomers. It was certain that polymeric precursor had a good effect on particle formation mechanism and status of particles surface. For enhancing the luminescence intensity and mechanical characteristics, optimal synthesizing conditions were investigated through concentration of monomers, synthesis temperature, and activator concentration. In result, the red emission intensity of the spherical (Y, Gd)BO3:Eu3+ phosphor was increased by about 20% by using the polymeric reaction route, compared to that using conventional spray pyrolysis. They were also observed to have spherical shape, dense morphology, and rigid surface. (C) 2004 The Electrochemical Society.