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20 October 2004 Concentration and crystallite size dependence of the photoluminescence in YAG:Ce3+ nanophosphor
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Nanocrystalline yttrium aluminum garnet doped with Cerium (YAG:Ce3+), was synthesized by means of a modified sol-gel method that consists of a mixture of salts in an aqueous media. Structure and morphology were characterized by X-ray diffraction and Transmission Electron Microscopy. Single crystalline phase were obtained and the crystallite size range from 26 nm to 96 nm depending on the annealing temperature (from 800 to 1150 °C, respectively). The photoluminescence dependence on the crystallite size and ion concentration was performed. The experimental results show that the best ion concentration where the highest luminescence was obtained correspond to 0.1 mol% and that increases as the crystallite size increases. The feasibility of the modified sol-gel method for the preparation of nanocrystalline YAG is discussed.
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Raquel Ovalle, Alejandro Arredondo, Luis Armando Diaz-Torres, Pedro Salas, Carlos Angeles, Ruben A. Rodriguez, Marco Antonio Meneses, and Elder De la Rosa "Concentration and crystallite size dependence of the photoluminescence in YAG:Ce3+ nanophosphor", Proc. SPIE 5530, Fourth International Conference on Solid State Lighting, (20 October 2004);

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