Fabrication And Optimization Of Electrodes For Dye-sensitized Solar Cell

Dye-sensitized solar cell(DSC) is a kind of novel solar cell based on photoelectrochemical principles. Compared to the conventional solar cells, it use cheap and environment-friendly titanium dioxide as raw material. The fabrication methods of DSC are very simple and convenient. Thus, interests in the study of dye-sensitized solar cell have grown considerably in recent years from the fundamental aspect to the application perspective. DSC is regarded as the potential feasible cheap way to ultilize solar energy and overcome the energy crisis and environment problem. In the thesis, the fabrication of titanium-based photo-anode and the optimization of DSC were studied. Then the light-to-current conversion efficiency of DSC was also discussed.The photo-anode is made of commercial nano-size titanium dioxide powder. Different powder dispersion techniques and annealing techniques have been used to fabricate photo-anode. Porous film made of paste which was dispersed using water and ethanol as dispersive agent can adhere to the conductive substrate firmly. The optimization photo-to-current performance has been achieved by annealing the photo-anode at 500℃for 30min. The amount of additive and the thickness of the film can affect the short-circuit current and open-circuit voltage of DSC. The addition of TBP can increase the open-circuit voltage.The platinum counter electrodes with different morphology have been made by electroplating and heat decomposition deposition of hexachloroplatinic acid. The performance of DSC using different platinum has been tested.Epoxy, silicone sealant and PVC film have been used to assemble cells. The research finds that PVC film is the best sealant to seal the DSC. Finally, the establishment of cell's performance test system has been illustrated, and the detail effect has been discussed.