A method for manufacturing a fullerence/PEDOT:PSS mixed solution includes the following steps: Step 1, preparing a fullerence solution by mixing fullerence molecules and water or a strong polar solvent, wherein the fullerence molecules are fullerence or fullerence derivants and the fullerence derivants are water-soluble fullerence derivants or water-insoluble fullerence derivants; and Step 2, mixing the fullerence solution and a PEDOT:PSS dilute solution of a certain concentration at a mass ration of 1:100 to 100:1 via mechanical agitation or ultrasonication to form a fullerence/PEDOT:PSS mixed solution in homogeneous dispersions.