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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
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TP Chemical technology
Online Access:http://eprints.uthm.edu.my/8405/1/24p%20AZMAN%20TALIB.pdf
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spelling my.uthm.eprints.84052023-02-26T02:59:17Z http://eprints.uthm.edu.my/8405/ Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO) 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 NonPeerReviewed text en http://eprints.uthm.edu.my/8405/1/24p%20AZMAN%20TALIB.pdf text en http://eprints.uthm.edu.my/8405/2/AZMAN%20TALIB%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/8405/3/AZMAN%20TALIB%20WATERMARK.pdf Talib, Azman (2022) Enhancement of titanium dioxide (TiO2) dye-sensitized solar cells (DSSCs) performance with incorporation of reduced graphene oxide (rGO). Doctoral thesis, Universiti Tun Hussein Onn Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
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
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)
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
http://eprints.uthm.edu.my/8405/
_version_ 1758952403314409472
score 13.211869

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