NOVELTY - The method involves inducing reaction of first precursor with second precursor that comprises an organic acid compound reaction product and group-sixteen elements. Reaction of an organic acid compound with the first precursor is induced, where the organic acid compound comprises low-molecular organic acid, oleic acid and group-fourteen elements. Carbon number of the oleic acid is twelve or less than twelve. Mole ratio of the low molecular organic acid and the oleic acid is 9:1-7:3. The low-molecular organic acid is formic acid, acetic acid, caprylic acid, capric acid or lauric acid.    USE - Method for manufacturing a quantum dot of a solar cell.    ADVANTAGE - The method enables inducing the reaction of the first precursor with the second precursor and the reaction of the organic acid compound with the first precursor so as to facilitate smooth modification of size and shape of a quantum dot of a solar cell, so that air-stability of the solar cell can be easily improved.    DETAILED DESCRIPTION - The first precursor is lead acetate, lead acetate trihydrate, lead bromide, lead chloride, lead fluoride, lead oxide, lead perchlorate, lead nitrate, lead sulfate, lead carbonate, lead acetylacetonate, lead citrate, lead fluoride, lead naphthal rhenate, tin acetate, tin bisacetylacetonate, tin bromide, tin chloride, tin chloride dihydrate, tin chloride pentahydrate, tin fluoride, tin oxide, tin sulfate, tin iodide, diphenyl tin dichloride, germanium tetra-chloride, germanium oxide, germanium ethoxide, germanium bromide, germanium iodide, tetra-methyl germanium, trimethylgermanium chloride, trimethyl germanium bromide or triethyl germanium chloride. The second precursor is tri-n-octylphosphine selenide, tri-n-butylphosphine selenide, diethyl diselenide, dimethyl selenide, selenium-triphenylphosphine, tri-n-octylphosphine telluride, tri-n-butylphosphine telluride, tellurium-triphenylphosphine, sulfur-trioctyl phosphine, sulfur-tributyl phosphine, sulfur-triphenylphosphine, sulfur-trioctylamine, bis-trimethylsilyl sulfide, trimethyl silyl sulfur, ammonium sulfide or sodium sulfide. The organic acid compound comprises organic solvent that is 1-octadecyne or trioctylamine group material. An INDEPENDENT CLAIM is also included for a solar cell manufacturing method.