Influence of the Condition of Heat Treatment to the Properties of TiO2 Thin Film Prepared using Spin Coating Technique.

We study the growth of TiO2 thin film using simple spin coating technique. In this paper, the effect of heat treatment to the TiO2 thin film was investigated within heat treatment in open and closed environment. In open environment, the heat treatment was carried using hot plate and in closed environment the heat treatment was carried in an oven. TiO2 solution was prepared with titanium butoxide as precursor, glacial acetic acid as a chelating agent, ethanol as solvent and deionised water. Triton X-100 acts as a stabilizer to avoid precipitation in solution and to increase the conductivity of films. To our knowledge there are no research comparing the influence of open and closed environment during heat treatment. Smaller grain size was found in nanostuctured TiO2 thin film with closed environment. At low magnification of FESEM image, it was shown that the crack-free was occur when nanostuctured TiO2 thin film is in closed environment compared to open environment. At high magnification there no significant on the structure was observed. In addition, no change in their crystallinity was found. The resistivity (current versus voltage) have smaller different due to the different structure on nanostructured TiO2 thin film. [ABSTRACT FROM AUTHOR]