A METHOD FOR PRODUCING LUMINESCENT NANOPARTICLES

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The present invention relates to a method for producing luminescent nanoparticles wherein particle size of the nanoparticles is controlled. The method of the present invention includes admixing two or more rare earth metal salts in a first solvent and an organic oil to form a reaction mixture, and subjecting the reaction mixture to an inert gas so that flow rate of the inert gas is at least 2-5 L/h and pressure in the reaction vessel is at least 50 Pa over atmospheric pressure, preferably 50-80 Pa over atmospheric pressure.