Electrochemical Study on Fluorine Doped Bi<sub>2</sub>O<sub>3 </sub>films Deposited by a Sol-Gel Spin Coating Technique to Evaluate Energy Efficiency

It has been demonstrated that thin films of fluorine-doped Bi 2 O 3 can be prepared using sol-gel spin coating. An X-ray diffraction (XRD) and energy dispersive analysis were used to examine samples. Using a sol-gel spin-coating technique, different electrolytes and sweep rates were used in the study to characterize fluorine-doped Bi 2 O 3 films. In the results of the studies, it was extensively examined whether these films could be used in the fabrication of electrochromic devices. The enhanced properties of fluorine doped samples are due to their increased separation efficiency and strong oxidation potential. For two hours, the samples were exposed to temperatures ranging from 350 °C to 450 °C. F:Bi 2 O 3 films have been the subject of an intercalation and deintercalation investigation. Therefore, H 2 SO 4 and KCl are used to intercalate H+ and K+ ions in PC electrolytes. Sharp transmittance peaks at the band's edge in a spectrum with good crystallinity signify interfering patterns. Band assignment 3482 cm -1 , stretching vibration of carbohydrate, C-OH, 2432 cm -1 asymmetric stretching vibration, 1625 cm -1 unconjugated C=O stretching vibration, and 1383 cm -1 bending vibration of C-H are among the numerous assignments in Fourier transform infrared spectroscopy. Additionally, 1101 cm -1 are vibrations of hydroxyl groups and 625 cm -1 are metallic bond vibrations of F:Bi 2 O 3 . The surface roughness of F:Bi 2 O 3 films was found to have significantly improved. It is probable that a sol-gel spin coating process at 200 °C produced dense, irregularly shaped Bi 2 O 3 grains. The thermodynamic characteristics of the corrosion process for Bi in concentrated sulfuric acid solution were studied. These parameters were Ea (activation energy), H (enthalpy change), and S (entropy change).