Effect of Film Thickness on F-doped TiO2 Films Synthesized by Spin Coating Technique

Fluorine-doped titanium dioxide (TiO2) thin films were synthesised using a spin coating technique from titanium tetra isopropoxide, acetic acid, and ethanol. These films are coated on glass substrate for various coating cycles ranging from 5 to 30 and were further annealed at 450°C. For initial cycles, films are amorphous in nature. Films attains crystallization after coating cycle of 15. Films shows significant changes in the surface morphology, which depends on the coating cycle. Film thickness shows linear variation with coating cycle. Increase thickness result in the enhancement of crystallite size and relaxation of film as evidenced from peak-width of X-ray diffraction patterns.