Preparation Of Dye Sensitized Solar Cell And Influencing Factors

With the energy crisis growing, the solar energy has been the attenting object because it’san inexhaustible green energy. Solar cell has becoming a hot topic of research that convertingthe light energy to electricity. In all solar cells, dye-sensitized solar cell （DSSC） has attractedresearchers at home and abroad study interest due to low-cost, simple preparation technologyand environmentally friendly.In the paper, firstly, the slurry is made using commercial P25as TiO₂powder, terpineolas solvent, polyvinyl butyral （PVB） as adhesive, and polyethyleneglycol-600（PEG-600） asthe surfactant. TiO₂film is produced by doctor blade and colloidal spray coating, thensensitized by N719dye. The electrolytes are made with I^-/I₃^-as oxidation reduction pair,respectively, using aqueous ethanol solution （50V%water and50V%ethanol）, propylenecarbonate in ethanol solution （50V%ethanol and50V%propylene carbonate） and3-methoxypropionitrile as three kinds of solvent system. The counter electrodes with differentplatinum layers thickness are fabricated by means of magnetron sputtering. Assemble theDSSC. Then the photoelectric properties of the TiO₂film and DSSC are tested by I-V curvetest system, ultraviolet and visible spectrophotometer, X-ray diffractometer, scanningelectronic microscope, energy-dispersive X-ray fluorescence, electrochemical workstation,infrared spectrophotometer, et al. Through the optimization of the fabrication process andconditions, then the photoelectric conversion efficiency is improved from1.44%to3.42%.The next, Nano-TiO₂thin film is prepared by a new type technique-centrifugalsedimentation. TiO₂photoanode is successfully prepared by centrifugal sedimentation via theresearches of some factors, such as the choice of the dispersant in the TiO₂suspension, thetime of ultrasonically dispersing, the times of centrifugal sedimentation, the time ofcentrifugation, the volume of suspension liquid and the dispersion of different weight titaniumdioxide particles by the same volume dispersant. Assemble the DSSC and test thephotoelectric properties. The DSSC initially obtaine a short circuit current density of8.14mA/cm²and an photoelectric conversion efficiency of8.138%.