Room Temperature Synthesized TiO2/Bi2Se3 Bilayer Thin Film by Simple Chemical Route: Study the Effect of Deposition Time of Bismuth Selenide on Physical Properties of Film.

Simple chemical route namely Chemical Bath Deposition (CBD) has been successfully employed for deposition of Bismuth Selenide (Bi₂Se₃) nanoparticles on porous TiO₂ at room temperature. The effect of deposition time of Bi₂Se₃ on structural, surface morphological and optical properties of TiO₂/Bi₂Se₃ bilayer film has been systematically investigated. X-ray diffraction and energy dispersive X-ray spectra analysis was confirmed the Bi₂Se₃ nanoparticles are of effectively deposited on anatase TiO₂ film. Field Emission Scanning Electron Microscopy (FESEM) images shows the TiO₂ film uniformly covers by Bi₂Se₃ nanoparticles. Optical absorption spectrum is reflecting the considerable enhancement in absorption of visible light with increasing deposition time of Bi₂Se₃ on TiO₂ thin film. [ABSTRACT FROM AUTHOR]