NOVELTY - A carbon spherical template having multi-shell structure is dispersed in a zinc salt solution, stirred, filtered, washed, oven-dried, calcined, and naturally cooled to obtain zinc oxide multi-shell hollow spheres. The obtained spheres, terpineol, and ethyl cellulose are uniformly ultrasonically dispersed in absolute ethanol for 30 minutes to obtain a zinc oxide white paste. The white paste is knife-coated on a cleaned fluorine-doped tin oxide conductive glass and heated to obtain a zinc oxide shell layer thin film electrode material.    USE - Preparation of zinc oxide thin film electrode material (claimed) for dye-sensitized solar cells.    ADVANTAGE - The method provides zinc oxide thin film electrode materials having high specific surface area and dye absorption amount. The multi-shell structure improves the scattering effect and light absorption rate, to improve the photoelectric conversion efficiency of solar cells. The method is simple and easy to control.    DETAILED DESCRIPTION - A carbon spherical template is obtained by hydrothermally reacting of an aqueous sucrose solution with a concentration of 1-2M in a high-pressure kettle at 180-220 degrees C for 130-180 minutes, naturally cooling, filtering, washing with water and ethanol, and oven-drying at 80 degrees C for 12-24 hours. The grain diameter of the carbon sphere is 2-8 mu m. The carbon spherical template having multi-shell structure is uniformly dispersed in a zinc salt solution, stirred for 4-8 hours, filtered, washed with deionized water 3-5 times, oven-dried at 80 degrees C for 12-24 hours to obtain a solid powder, calcined in a muffle furnace, and naturally cooled to obtain zinc oxide multi-shell hollow spheres. The obtained spheres, terpineol, and ethyl cellulose are uniformly ultrasonically dispersed in absolute ethanol for 30 minutes to obtain a zinc oxide white paste. The white paste is knife-coated on a cleaned fluorine-doped tin oxide conductive glass and heated to obtain a zinc oxide shell layer thin film electrode material. An INDEPENDENT CLAIM is included for zinc oxide shell layer thin film electrode material.