Rapid synthesis of garnet structured aluminosilicate phosphors

Abstract MY2Al4SiO12:Ce3+ phosphors have been shown to possess several features such as yellow emission and blue excitation, thermal stability, etc. desired for phosphor converted LED. Various methods have been tried earlier to prepare these phosphors. Annealing/synthesis at temperatures as high as 1400 °C was always essential to obtain these compounds. A simple, one step combustion synthesis is described for the preparation of phosphors based on MY2Al4SiO12. The phosphors so prepared had emission intensities comparable to those obtained by conventional solid state reaction. Thus, a method is established to synthesize these compounds at temperatures as low as 500 °C eliminating the problems associated with high temperature processing.