Characterization of Titanium Dioxide (TiO2) Doping on Reduced Graphene Oxide (rGO) for Dye Sensitized Solar Cell (DSSC) Application

Afiqah, Binti Baharin (2020) Characterization of Titanium Dioxide (TiO2) Doping on Reduced Graphene Oxide (rGO) for Dye Sensitized Solar Cell (DSSC) Application. Masters thesis, Universiti Malaysia Sarawak (UNIMAS).

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Abstract

This research is to fabricate dye sensitized solar cell with introduction of graphene layers and examine the structural, optical, electrical properties and chemical bonding of different doping ratio of TiO2-rGO for Dye Sensitized Solar Cell (DSSC) application. Titanium Dioxide solution was prepared using precipitation peptization method and reduced graphene oxide solution was prepared by using chemical reduction method. The effects of different doping ratio of TiO2-rGO were studied and fabricated for DSSC application. The performance of the thin film was characterized by Scanning Electron Microscope (SEM), X-ray Diffraction (XRD) and Atomic Force Microscopy (AFM) for structural properties. Meanwhile, Ultraviolet-visible spectroscopy (UV-Vis) and Fourier Transform Infrared spectroscopy (FTIR) for optical properties, I-V measurement by using Keithley sourcemeter to analyse the electrical properties of the thin film while X-ray Photoelectron Spectroscopy (XPS) measurement to analyse the chemical bonding between TiO2 and rGO. It is observed that a low content of rGO (0.1 wt%) was successfully incorporated with TiO2 and form TiO-C bond, which enhance the power conversion efficiency up to 1.21% compared to pure TiO2 (0.19%). This was also supported by UV-Vis spectra with highest absorption and lowest band gap energy of 2.87 eV. However, 0.5 wt% TiO2-rGO resulted in poor photoconversion efficiency performance due to the over photocatalytic reaction occurred leaving extra holes on the counter electrode. Therefore, rGO is potentially to be coupled with TiO2 and applied as photoanode in DSSC application to lower the recombination loss.

Item Type: Thesis (Masters)
Additional Information: Thesis (MEng.) - Universiti Malaysia Sarawak , 2020.
Uncontrolled Keywords: Doping, DSSC, titanium dioxide, reduced graphene oxide, thin films,unimas, Samarahan, Sarawak, Borneo, universiti, university, Malaysia, Kuching, ipta, undergraduate, education, Universiti Malaysia Sarawak.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: AFIQAH BINTI BAHARIN
Date Deposited: 06 Jul 2020 04:05
Last Modified: 06 Jul 2020 05:46
URI: http://ir.unimas.my/id/eprint/30210

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