Synthesis and Characterization of YAG:Ce3+ Nanophosphor prepared by Flame Spray Pyrolysis

Among the various types of synthesis techniques for phosphors, flame spray pyrolysis (FSP) is a powerful method which is capable of producing particles with good crystallinity and high luminescence efficiency. In this work, we have studied the possibility of producing yellow light emitting Ce doped Y3Al5O12 (YAG:Ce) nanophosphor particles using FSP. The challenges in forming YAG arise because of its complex stoichiometry and existence of numerous crystalline states. 3 M of urea was added to increase the flame temperature. The as-prepared nanoparticles were annealed in the temperature range 800°C to 1100°C for 1 hour. As-prepared phosphor particles were found to be YAlO3 which transformed to YAG when annealed above 900°C . PL intensity of the phosphors increased with increase in annealing temperature. These results indicate the possibility of fabrication of high quality YAG:Ce nanophosphor particles via a simple process.