Preparation of nonaggregated Y2O3 : Eu phosphor particles by spray pyrolysis method

Y2O3 : Eu phosphor particles were directly prepared by a spray pyrolysis me thod. Photoluminescence, morphology, and crystallinity of the as-prepared p articles were investigated. The as-prepared particles above 600 degrees C h ad good crystallinity, and the crystallinity increased with increasing reac tor temperatures. The particles had spherical morphology and were nonaggreg ated, The mean size of the particles increased from 0.34 to 1.2 mu m when t he solution concentration was increased from 0.03 to 1 M. The as-prepared p articles had good red emission without annealing at high temperatures when excited with uv light. The main emission peak was 612 nm. The brightness of the as-prepared particles increased with increasing temperatures because o f good activation and crystallization at high temperatures.