Fabrication of nanorod TiO2/CU2O heterostructure thin film

Titanium Dioxide (TiO2) has been investigated as a potential material to use in solar cell application. It has good refractive index in visible region, able to function as photocatalyst and produces high transmittance. In this study, the chemical stability of TiO2 and the photon absorbance spectrum...

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Main Author:	Fahrizal, Fadilah Norazni
Format:	Thesis
Language:	English English English
Published:	2019
Subjects:	TK7800-8360 Electronics
Online Access:	http://eprints.uthm.edu.my/487/1/24p%20FADILAH%20NORAZNI%20FAHRIZAL.pdf http://eprints.uthm.edu.my/487/2/FADILAH%20NORAZNI%20FAHRIZAL%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/487/3/FADILAH%20NORAZNI%20FAHRIZAL%20WATERMARK.pdf
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spelling	my-uthm-ep.4872021-07-25T07:19:36Z Fabrication of nanorod TiO2/CU2O heterostructure thin film 2019-08 Fahrizal, Fadilah Norazni TK7800-8360 Electronics Titanium Dioxide (TiO2) has been investigated as a potential material to use in solar cell application. It has good refractive index in visible region, able to function as photocatalyst and produces high transmittance. In this study, the chemical stability of TiO2 and the photon absorbance spectrum of Copper Oxide (Cu2O) were coupled with their conveniently aligned interface to form a TiO2 /Cu2O heterojunction. However, it was reported that, the combination of planar n-type TiO2/p-type Cu2O was having low efficiency in solar cell application due to the limited area of the heterostructure for efficient charge collection. Therefore, nanorod structure has been suggested to overcome this problem. Nanorods provide stable electrodes and larger surface area for charge transfer reactions. This approach will attribute the enhancement desirable absorption of UV–visible light in natural solar spectrum which improved the surface–interface reactions. The n-TiO2 and p-Cu2O thin film were fabricated using hydrothermal and electrodeposition method, respectively. The fabrication parameters were investigated to obtain the optimum parameters of TiO2 thin film. The TiO2 thin film exhibited optimum 16 hours duration of hydrothermal process with the concentration of TBOT used was 0.05 M. After that, p-Cu2O layer was deposited on nanorod TiO2 thin film for heterojunction formation. Prior to the p-Cu2O deposition on nanorod TiO2/FTO substrate, cyclic voltammetry (CV) measurement was carried out. The p-Cu2O thin film was deposited at -0.4V vs. Ag/AgCl based on the CV measurement result. The effect of deposition time was also investigated during electrodeposition to improve the properties of the p-n junction semiconductor material. P-Cu2O thin film were fabricated by using copper acetate based solution through potentiostatic with pH value of 12.5. The Cu2O was successfully developed on the TiO2 layer with high crystallinity and lower resistance via two-step electrodeposition method. The successful fabrication of nanorods TiO2/Cu2O heterojunction thin film will open a new door of development thin film solar cell application. 2019-08 Thesis http://eprints.uthm.edu.my/487/ http://eprints.uthm.edu.my/487/1/24p%20FADILAH%20NORAZNI%20FAHRIZAL.pdf text en public http://eprints.uthm.edu.my/487/2/FADILAH%20NORAZNI%20FAHRIZAL%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/487/3/FADILAH%20NORAZNI%20FAHRIZAL%20WATERMARK.pdf text en validuser mphil masters 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	TK7800-8360 Electronics
spellingShingle	TK7800-8360 Electronics Fahrizal, Fadilah Norazni Fabrication of nanorod TiO2/CU2O heterostructure thin film
description	Titanium Dioxide (TiO2) has been investigated as a potential material to use in solar cell application. It has good refractive index in visible region, able to function as photocatalyst and produces high transmittance. In this study, the chemical stability of TiO2 and the photon absorbance spectrum of Copper Oxide (Cu2O) were coupled with their conveniently aligned interface to form a TiO2 /Cu2O heterojunction. However, it was reported that, the combination of planar n-type TiO2/p-type Cu2O was having low efficiency in solar cell application due to the limited area of the heterostructure for efficient charge collection. Therefore, nanorod structure has been suggested to overcome this problem. Nanorods provide stable electrodes and larger surface area for charge transfer reactions. This approach will attribute the enhancement desirable absorption of UV–visible light in natural solar spectrum which improved the surface–interface reactions. The n-TiO2 and p-Cu2O thin film were fabricated using hydrothermal and electrodeposition method, respectively. The fabrication parameters were investigated to obtain the optimum parameters of TiO2 thin film. The TiO2 thin film exhibited optimum 16 hours duration of hydrothermal process with the concentration of TBOT used was 0.05 M. After that, p-Cu2O layer was deposited on nanorod TiO2 thin film for heterojunction formation. Prior to the p-Cu2O deposition on nanorod TiO2/FTO substrate, cyclic voltammetry (CV) measurement was carried out. The p-Cu2O thin film was deposited at -0.4V vs. Ag/AgCl based on the CV measurement result. The effect of deposition time was also investigated during electrodeposition to improve the properties of the p-n junction semiconductor material. P-Cu2O thin film were fabricated by using copper acetate based solution through potentiostatic with pH value of 12.5. The Cu2O was successfully developed on the TiO2 layer with high crystallinity and lower resistance via two-step electrodeposition method. The successful fabrication of nanorods TiO2/Cu2O heterojunction thin film will open a new door of development thin film solar cell application.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Fahrizal, Fadilah Norazni
author_facet	Fahrizal, Fadilah Norazni
author_sort	Fahrizal, Fadilah Norazni
title	Fabrication of nanorod TiO2/CU2O heterostructure thin film
title_short	Fabrication of nanorod TiO2/CU2O heterostructure thin film
title_full	Fabrication of nanorod TiO2/CU2O heterostructure thin film
title_fullStr	Fabrication of nanorod TiO2/CU2O heterostructure thin film
title_full_unstemmed	Fabrication of nanorod TiO2/CU2O heterostructure thin film
title_sort	fabrication of nanorod tio2/cu2o heterostructure thin film
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2019
url	http://eprints.uthm.edu.my/487/1/24p%20FADILAH%20NORAZNI%20FAHRIZAL.pdf http://eprints.uthm.edu.my/487/2/FADILAH%20NORAZNI%20FAHRIZAL%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/487/3/FADILAH%20NORAZNI%20FAHRIZAL%20WATERMARK.pdf
_version_	1747830622160683008

Fabrication of nanorod TiO2/CU2O heterostructure thin film

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