Effects of Annealing Temperature of TiO_2 Thin Film Deposited by Spray Pyrolysis Deposition Method for Dye-Sensitized Solar Cell (DSSC) Application

摘要

Titanium dioxide (TiO_2) thin films have been fabricated and deposited on FTO glass substrates by spray pyrolysis deposition (SPD) method. The TiO_2 thin films were annealed at four different temperatures for an hour. The temperature was set at 100°C, 300°C, 400°C and 500°C. Surface morphology and electrical properties of TiO_2 thin films were investigated using FESEM and 2 point-probe I-V measurement, respectively. The FESEM result shows that the grain size of the TiO_2 increases when annealed temperature increases. For XRD test shows that the crystallinity improved with the increasing of annealing temperature. When the annealing temperature increases, the electrical properties of TiO_2 also change. The result shows that the optimum temperature for annealing of TiO_2 thin film was 400°C.