Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)

The purpose of this thesis is to investigate the structural, optical and electrical properties of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) with the incorporation of reduced graphene oxide (rGO). In this experiment, rGO from electrochemical exfoliation, was deposited onto few fluori...

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Main Author:	Talib, Azman
Format:	Thesis
Language:	English English English
Published:	2022
Subjects:	TP Chemical technology
Online Access:	http://eprints.uthm.edu.my/8405/1/24p%20AZMAN%20TALIB.pdf http://eprints.uthm.edu.my/8405/2/AZMAN%20TALIB%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/8405/3/AZMAN%20TALIB%20WATERMARK.pdf
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spelling	my-uthm-ep.84052023-02-26T02:59:17Z Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO) 2022-03 Talib, Azman TP Chemical technology The purpose of this thesis is to investigate the structural, optical and electrical properties of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) with the incorporation of reduced graphene oxide (rGO). In this experiment, rGO from electrochemical exfoliation, was deposited onto few fluorine-doped tin-oxide (FTO) substrat through spray pyrolysis deposition (SPD) method with different rGO volumes. Then, all the fabricated FTOs went through rutile-phase TiO2 (r-TiO2) with hydrothermal synthesis. From DSSCs analysis, 0.50 mL of rGO volume exhibited the best photovoltaic (PV) performance with the efficiency of 2.61% and open-circuit voltage of 0.70 V. The successful synthesis of rGO, incorporated with TiO2 was confirmed using Raman spectroscopy. The analysis of the samples was done using X-ray diffraction, field emission scanning electron microscopy, ultraviolet-visible spectrophotometry, and incident photon-to-carrier conversion efficiency spectra. Then, another rGO which was produced through Hummers method, was incorporated into anatase-phase TiO2 (a-TiO2) as nanocomposite (NC) mixture. After that, through SPD method, the NC mixture was deposited onto few FTOs. The a-TiO2 was produced by adding TKC-302 into TiO2 P25 powder. The NC mixture samples significantly contributed towards the improvement of efficiency, when compared with samples without rGO. When 2 mL of rGO was added into a-TiO2, PV performance achieved the highest efficiency of 3.15% and current density of 5.98 mA/cm2. Finally, the combination of rGO and a-TiO2 NC mixture, was overlayered onto r-TiO2. The 2 mL of rGO/a-TiO2 NC mixture which was deposited through SPD onto r-TiO2, exhibited the best PV performance with the highest efficiency of 5.72% and the current density of 10.37 mA/cm2. The rGO acted as an important material, to maximise the photogenerated electrons of photo-induced charge carriers. The photogenerated electrons from dyes transferred through r-TiO2, effectively traveled out to the circuit load, which underwent recombination with holes in the solar cells with enhancement of rGO functions. 2022-03 Thesis http://eprints.uthm.edu.my/8405/ http://eprints.uthm.edu.my/8405/1/24p%20AZMAN%20TALIB.pdf text en public http://eprints.uthm.edu.my/8405/2/AZMAN%20TALIB%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/8405/3/AZMAN%20TALIB%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Talib, Azman Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)
description	The purpose of this thesis is to investigate the structural, optical and electrical properties of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) with the incorporation of reduced graphene oxide (rGO). In this experiment, rGO from electrochemical exfoliation, was deposited onto few fluorine-doped tin-oxide (FTO) substrat through spray pyrolysis deposition (SPD) method with different rGO volumes. Then, all the fabricated FTOs went through rutile-phase TiO2 (r-TiO2) with hydrothermal synthesis. From DSSCs analysis, 0.50 mL of rGO volume exhibited the best photovoltaic (PV) performance with the efficiency of 2.61% and open-circuit voltage of 0.70 V. The successful synthesis of rGO, incorporated with TiO2 was confirmed using Raman spectroscopy. The analysis of the samples was done using X-ray diffraction, field emission scanning electron microscopy, ultraviolet-visible spectrophotometry, and incident photon-to-carrier conversion efficiency spectra. Then, another rGO which was produced through Hummers method, was incorporated into anatase-phase TiO2 (a-TiO2) as nanocomposite (NC) mixture. After that, through SPD method, the NC mixture was deposited onto few FTOs. The a-TiO2 was produced by adding TKC-302 into TiO2 P25 powder. The NC mixture samples significantly contributed towards the improvement of efficiency, when compared with samples without rGO. When 2 mL of rGO was added into a-TiO2, PV performance achieved the highest efficiency of 3.15% and current density of 5.98 mA/cm2. Finally, the combination of rGO and a-TiO2 NC mixture, was overlayered onto r-TiO2. The 2 mL of rGO/a-TiO2 NC mixture which was deposited through SPD onto r-TiO2, exhibited the best PV performance with the highest efficiency of 5.72% and the current density of 10.37 mA/cm2. The rGO acted as an important material, to maximise the photogenerated electrons of photo-induced charge carriers. The photogenerated electrons from dyes transferred through r-TiO2, effectively traveled out to the circuit load, which underwent recombination with holes in the solar cells with enhancement of rGO functions.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Talib, Azman
author_facet	Talib, Azman
author_sort	Talib, Azman
title	Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)
title_short	Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)
title_full	Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)
title_fullStr	Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)
title_full_unstemmed	Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)
title_sort	enhancement of titanium dioxide (tio2) dye-sensitized solar cells (dsscs) performance with incorporation of reduced graphene oxide (rgo)
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2022
url	http://eprints.uthm.edu.my/8405/1/24p%20AZMAN%20TALIB.pdf http://eprints.uthm.edu.my/8405/2/AZMAN%20TALIB%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/8405/3/AZMAN%20TALIB%20WATERMARK.pdf
_version_	1776103337930784768

Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO)

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