The present invention relates to an iron chalcogenide nanocomposite with photoluminescent properties. The present invention also relates to a method for preparing the iron chalcogenide nanocomposite. The method includes (a) dissolving a Fe precursor in an organic solvent to form a Fe solution, (b) dissolving a chalcogen powder or a chalcogen precursor in an organic solvent to form a chalcogen solution, (c) dropwise injecting the Fe solution into the chalcogen solution to prepare a mixture solution in which an iron chalcogenide is formed, and (d) purifying the iron chalcogenide from the mixture solution.
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