NOVELTY - The method involves forming a layer of a micro carbon nano structure on a substrate. A transparent conductive thin film is covered on a surface of a composite structure to enhance light use efficiency of a battery. The composite structure is directly formed on a surface of the battery or formed by an independent structure, where the micro carbon nano structure is spherical, tubular, club, line, strip, flower, sheet or tooth-shaped and size of the micro carbon nano structure is 1-100 nm. The micro carbon nano structure is made by metal micro-nanometer particles.    USE - Method for improving current density and cell efficiency of a silicon solar battery structure (claimed).    ADVANTAGE - The method enables adopting the transparent conductive thin film to improve sunlight utilization rate, current density and efficiency of the solar battery by 2 percent. The method enables manufacturing the transparent conductive thin film in a simple manner and ensuring low manufacturing cost and obvious using effect. The method enables simplifying density and efficiency improving processes. The method enables adopting the combined structure of the micro carbon nanostructure and metal nano-particles to improve light transmittance and realize better application prospect by replacing a conducting glass.    DETAILED DESCRIPTION - The micro-nanometer particles are selected from a main group element of a periodic table with sub-group consisting of lanthanide and actinide metal and added with metal salt and complexing agent solution, where the metal salt is selected from inorganic salt, nitrate, nitrite, sulfate, sulfite, thiosulfate, carbonate, bicarbonate, salt, basic salt, phosphate, hydrogen phosphate, dihydrogen phosphate, hydrogen phosphate salt, sulfide, chloride, bromide, fluoride, iodide, formate, acetate, citrate, salicylate or sulfonate and the complexing agent solution is selected from aqueous solution with complexing agent that is selected from methenamine, sucrose, lactose, glucose, EDTA, DMF, PVP, ethylene glycol, polyethylene glycol, sodium dodecyl sulfate, hexadecyl trimethyl ammonium bromide or urea. The substrate is made of a float glass. An INDEPENDENT CLAIM is also included for a silicon solar battery structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a screen shot of a transparent conductive thin film of a silicon solar battery structure.