NOVELTY - Method for manufacturing porous micro/nano hierarchical structure of spherical zinc oxide, involves uniformly dispersing zinc nitrate hexahydrate and urea in water, autoclaving the above solution under high pressure at 100-l80 degrees C, where the ratio of zinc nitrate hexahydrate to urea is 1:3-1:6 and reaction time is 6 hours, cooling the solution at room temperature, washing and drying the solution, filtering the solution to obtain precipitates, and calcining the precipitates at 300-500 degrees C for 30-60 minutes.    USE - The method is useful for manufacturing porous micro/nano hierarchical structure of spherical zinc oxide used for manufacturing DSSC photoelectrode (claimed).    ADVANTAGE - The method prepares porous micro/nano hierarchical structure of spherical zinc oxide with good transmission and light scattering properties, and improved photoelectric conversion efficiency of DSSC.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for manufacturing dye-sensitized solar cell (DSSC) photoelectrode, which involves adding absolute ethyl alcohol to porous micro/nano hierarchical structure of spherical zinc oxide (0.1 g) and ball milling the mixture to obtain slurry, transferring the slurry to a 50 ml beaker, stirring the slurry for 10 minutes, subjecting the slurry to ultrasonication process for 10 minutes, adding anhydrous pine oil alcohol (2 g), ethyl cellulose (4 g) to the mixture, stirring the mixture, subjecting the mixture to ultrasonication process for 10 minutes, carrying out rotary evaporation process at 38 degrees C to obtain colloidal substance, cleaning fluorine-doped tin oxide (FTO) conductive glass, coating the obtained colloidal substance on FTO using doctor blade coating method, where the thickness of coating is 100 mu m, drying the film for 2 hours in air at 125 degrees C, annealing the film at 450 degrees C for 15 minutes, sintering the film at 500 degrees C for 15 minutes, and immersing the film into N719 ethanol electrolyte solution for 2-5 hours to obtain DSSC photoelectrode.