Study of Effect of the Chrome Additive on the Structural, Morphology and Optical Properties of Nanostructured Titanium dioxide Thin Film

Abstract

Undoped Titanium dioxide (TiO2) and Cr-doped TiO2 films were prepared by Spray Pyrolysis Technique (SPT). XRD styles showed that TiO2 films were grown along dominant orientation of (111). Crystallite size increases from 8.95 nm to 9.70 nm as vanadium concentration increase, whereas the strain(%) parameter increased from 3.87 to 3.57. the AFM imaging shows that the Undoped TiO2 and TiO2: Cr thin films was discontinuous surface with spherically grains decreased from (65.95-44.23 nm) with increase doping from 0% to 3%, and root-mean square (rms) roughness of surface is about (9.70-2.41) nm. Spectrometric analysis of deposited films showed high transmittance in spectral range from 300 to 900 nm, whereas the corresponding value of bandgaps was ranged from 3.48 to- 3.38 eV by Cr doping. Results show that doping of TiO2 with Cr enhances the optical properties. the absorption coefficient (α), extinction coefficient (k) and refractive index (n) are increased when Cr additive is increasing.