Abstract
Nanostructure TiO2 is prepared using the hydrothermal process for applications as an anode in dye-sensitized solar cells (DSSCs). The effect of such fabrication conditions as the resistance of fluorine doped tin oxide-coated (FTO) glass, polyethylene glycol (PEG) content in TiO2 paste, TiO2 film thickness, electrolyte solvent, and the preparation of Pt counter electrode on the performance of the DSSC device, is systematically studied using fractional factorial design methodology. Fractional factorial analysis indicates that the effects of TiO2 film thickness, preparation of Pt counter electrode, as well as the two-factor interactions of FTO substrate and TiO2 film thickness, TiO2 film thickness and electrolyte solvent, and TiO2 film thickness and preparation of Pt counter electrode, are the key variables influencing the device efficiency. The optimal conditions of the device efficiency occurs for a 10 Ω/square FTO substrate, 15 wt% PEG content in TiO2 paste, ~ 6 μm TiO2 film thickness, MPN solvent in electrolyte, and spin-coated Pt counter electrode, generating a maximum device efficiency of ~ 9 %.
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