Dye-Sensitized Solar Cell Utilizing TiO2 Nanostructure Films: Effect of Synthesis Temperature

Resumo

This paper is concerned with a study of the influence of synthesis temperature on the properties of TiO₂ films and the performance of dye-sensitized solar cell (DSSC). The TiO₂ film samples synthesized via liquid phase deposition for 5 h at various temperatures, namely, 40, 50, 60, 70 and 80°C. It was found that the morphological shape of the film changes with growth temperature. The optical absorption increases with growth temperature. However, the photoluminescence decreases with growth temperature. These TiO₂ samples were applied in a DSSC of ITO/TiO₂/electrolyte/platinum. The DSSC utilizing the sample grown at 40°C demonstrated the highest photovoltaic parameters with the J_sc, and η of 1.40 mA cm^–2 and 0.44% respectively. This is due to the smallest grain size of TiO₂ films and the smallest bulk resistance of the device.