NOVELTY - The method involves coating a templating material with inorganic oxide precursor solution. A graphene is combined with a surface of a graphene electrode. The graphene electrode is arranged on a substrate. A metal electrode is arranged on a charge transport layer. The charge transport layer is arranged on an active layer. Another charge transport layer is formed. The active layer is arranged on the latter charge transport layer. An inorganic oxide thin film is arranged within the latter charge transport layer. The template material is removed through thermal process.    USE - Method for manufacturing a solar cell.    ADVANTAGE - The method enables arranging the inorganic oxide thin film on the graphene electrode so as to improve property of the inorganic oxide thin film through solution process on graphene electrode surface. The method enables manufacturing a large area of a solar cell with high efficiency and low cost.    DETAILED DESCRIPTION - The templating material is selected from polypeptide, DNA, RNA, virus and protein. The virus comprises aromatic amino acid compound that is selected from histidine, Phenylalanine, tyrosine, tryptophan, amine and imidazole. The imdazole comprises hydrophilicity cation functional group. The inorganic oxide precursor solution comprises p-type inorganic oxide precursor and n-type inorganic oxide precursor. The p-type inorganic oxide precursor is selected from tungsten trioxide, molybdenum trioxide, vanadium oxide, nickel oxide, sodium tungstate, sodium tungstate di Hydrite and ammonium para tungsten. The n-type inorganic oxide precursor is selected from titanium dioxide and titanium bis ammonium camel toddy hydroxide. The active layer is made of an organic semiconductor material or perovskite semiconductor material. An INDEPENDENT CLAIM is also included for a solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a method for manufacturing a solar cell. '(Drawing includes non-English language text)'