Analysis of electrochemically deposited metal oxide as counter electrode for solar cells

Karim, Ahmad Saufudin (2022) Analysis of electrochemically deposited metal oxide as counter electrode for solar cells. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Electrochemical deposition is one of the low-cost techniques to deposit copper oxide thin films onto ITO glass. The method involves using three electrodes system with ITO glass as a working electrode, a silver chloride electrode (Ag/AgCl) as a reference electrode, and a platinum (Pt) plate as a counter electrode for electrochemical deposition. The copper oxide has been electrochemically deposited on the ITO glass in two electrolytes: 0.2M CuSO4.5H2O with 3M lactic acid and 0.2M CuSO4.5H2O with 0.1M of sulfuric acid. The copper oxide was electrochemical deposition by varying deposition potentials and deposition times. The copper oxide deposited was characterized by Scanning Electron Microscopy (SEM), Ultraviolet-Visible Spectroscopy (UV-Vis) and a four-point probe. From visual inspection, it was found that copper oxide was dark brown on ITO glass. The SEM study reveals that the deposited layer becomes uniform when the deposition potential and time increase. It was found that the deposited layer becomes thicker with the increase of deposition time. UV-Vis shows that the deposited layer with increased deposition time has high absorbance. Finally, the copper oxide deposited was applied to solar cells where the Dye-Sensitized Solar Cells and Perovskite Solar Cell were fabricated.

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