PHOSPHOR, AND PREPARING METHOD OF THE SAME

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The present invention relates to a manufacturing method for phosphors comprising : a step of obtaining a mixed solution containing alkaline-earth metal salt, rare earth metal salt, group 4 metal salt and the oxide precursor excessive group 4 elements; and a step of performing heat treatment after adding cellulose in the mixed solution and phosphors manufactured thereby. [Reference numerals] (AA) Obtain a mixed solution containing alkaline-earth metal salt, rare earth metal salt, group 3 metal salt and excessive oxide precursors of group 4 elements; (BB) Perform heat treatment after adding cellulose in the mixed solution; (CC) Obstain phosphors powders