Abstract
A Gd2O3:Eu nanocrystal phosphor has been directly synthesized by a mild solution combustion methodwith a single step approach while avoiding further thermal annealing. The as-combustedGd2O3:Eu powders have been characterized by x-ray diffraction, infrared spectroscopy, transmissionelectron microscopy and photoluminescence spectra. The ratio of citric acid to metal nitrate (C/M) has a critical impact on the phase composition and crystallization of as-combustedGd2O3:Eu. Anoptimal C/M ratio of 0.7 gave highly crystalline powders with a single cubic phase,and a high luminescence intensity comparable with that of a commercialY2O3:Eu phosphor, even without further thermal annealing. This direct solution combustion methodcan be used to prepare a variety of high quality oxide nanocrystals.
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