Optimization of TiO2 thin film thickness for dye sensitized solar cell applications

Dye sensitized solar cells (DSSCs) rely on the absorption of photons by the dye molecules which are transported to the conduction band of the TiO2 electrode. The microstructure, energy gap and the absorption spectra of the TiO2 electrodes highly affects the efficiency of the cell. In this paper, the...

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Main Authors:	Mohamad, Souad A., Ahmed, Nafees, Othman, Raihan, Othman, Maizatulnisa
Format:	Conference or Workshop Item
Language:	English English English
Published:	Institute of Physics Publishing 2018
Subjects:	T Technology (General) TA401 Materials of engineering and construction
Online Access:	http://irep.iium.edu.my/65094/ http://irep.iium.edu.my/65094/ http://irep.iium.edu.my/65094/ http://irep.iium.edu.my/65094/1/65094_Optimization%20of%20TiO2_article.pdf http://irep.iium.edu.my/65094/2/65094_Optimization%20of%20TiO2_scopus.pdf http://irep.iium.edu.my/65094/13/65094_Optimization%20of%20TiO2%20thin_WOS.pdf

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spelling	iium-650942018-10-22T07:23:39Z http://irep.iium.edu.my/65094/ Optimization of TiO2 thin film thickness for dye sensitized solar cell applications Mohamad, Souad A. Ahmed, Nafees Othman, Raihan Othman, Maizatulnisa T Technology (General) TA401 Materials of engineering and construction Dye sensitized solar cells (DSSCs) rely on the absorption of photons by the dye molecules which are transported to the conduction band of the TiO2 electrode. The microstructure, energy gap and the absorption spectra of the TiO2 electrodes highly affects the efficiency of the cell. In this paper, the absorption spectra and energy gap has been studied by varying the thickness of the TiO2 paste. Nanocrystalline TiO2 thin films were deposited on ITO glass substrate with three different thickness (4.54μm, 7.12μm and 12.3μm) by using doctor blade method. After deposition all the samples were sintered at 450°C after deposition to enhance the particle bonding and for achieving better adhesion. The samples were characterized by UV-VIS spectra for determining the absorption spectra and Scanning Electron Microscopy (SEM) for investigating the thickness and the surface morphology. Fabricating the electrodes with different thickness showed significant changes in the energy gap and from the results it can be concluded that the energy gap increases with the increased thickness. The highest energy gap of 2.25ev and absorption 3.791 was achieved by 12.3μm thick sample. The absorption spectra also shows better absorption throughout the whole visible light range but the SEM images suggests that 12.3μm thick sample shows cracks all over the deposited region which will cause current leakage when the cell is assembled. Therefore, the optimum result was achieved by 7.12μm thick sample providing 1.9 ev energy gap and 3.91 absorption peak. Institute of Physics Publishing 2018-01-30 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/65094/1/65094_Optimization%20of%20TiO2_article.pdf application/pdf en http://irep.iium.edu.my/65094/2/65094_Optimization%20of%20TiO2_scopus.pdf application/pdf en http://irep.iium.edu.my/65094/13/65094_Optimization%20of%20TiO2%20thin_WOS.pdf Mohamad, Souad A. and Ahmed, Nafees and Othman, Raihan and Othman, Maizatulnisa (2018) Optimization of TiO2 thin film thickness for dye sensitized solar cell applications. In: International Conference on Advances in Manufacturing and Materials Engineering 2017, ICAMME 2017, 8th-9th August 2017, International Islamic University Malaysia (IIUM), Gombak Campus, Kuala Lumpur. http://iopscience.iop.org/article/10.1088/1757-899X/290/1/012004/pdf 10.1088/1757-899X/290/1/012004
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English English
topic	T Technology (General) TA401 Materials of engineering and construction
spellingShingle	T Technology (General) TA401 Materials of engineering and construction Mohamad, Souad A. Ahmed, Nafees Othman, Raihan Othman, Maizatulnisa Optimization of TiO2 thin film thickness for dye sensitized solar cell applications
description	Dye sensitized solar cells (DSSCs) rely on the absorption of photons by the dye molecules which are transported to the conduction band of the TiO2 electrode. The microstructure, energy gap and the absorption spectra of the TiO2 electrodes highly affects the efficiency of the cell. In this paper, the absorption spectra and energy gap has been studied by varying the thickness of the TiO2 paste. Nanocrystalline TiO2 thin films were deposited on ITO glass substrate with three different thickness (4.54μm, 7.12μm and 12.3μm) by using doctor blade method. After deposition all the samples were sintered at 450°C after deposition to enhance the particle bonding and for achieving better adhesion. The samples were characterized by UV-VIS spectra for determining the absorption spectra and Scanning Electron Microscopy (SEM) for investigating the thickness and the surface morphology. Fabricating the electrodes with different thickness showed significant changes in the energy gap and from the results it can be concluded that the energy gap increases with the increased thickness. The highest energy gap of 2.25ev and absorption 3.791 was achieved by 12.3μm thick sample. The absorption spectra also shows better absorption throughout the whole visible light range but the SEM images suggests that 12.3μm thick sample shows cracks all over the deposited region which will cause current leakage when the cell is assembled. Therefore, the optimum result was achieved by 7.12μm thick sample providing 1.9 ev energy gap and 3.91 absorption peak.
format	Conference or Workshop Item
author	Mohamad, Souad A. Ahmed, Nafees Othman, Raihan Othman, Maizatulnisa
author_facet	Mohamad, Souad A. Ahmed, Nafees Othman, Raihan Othman, Maizatulnisa
author_sort	Mohamad, Souad A.
title	Optimization of TiO2 thin film thickness for dye sensitized solar cell applications
title_short	Optimization of TiO2 thin film thickness for dye sensitized solar cell applications
title_full	Optimization of TiO2 thin film thickness for dye sensitized solar cell applications
title_fullStr	Optimization of TiO2 thin film thickness for dye sensitized solar cell applications
title_full_unstemmed	Optimization of TiO2 thin film thickness for dye sensitized solar cell applications
title_sort	optimization of tio2 thin film thickness for dye sensitized solar cell applications
publisher	Institute of Physics Publishing
publishDate	2018
url	http://irep.iium.edu.my/65094/ http://irep.iium.edu.my/65094/ http://irep.iium.edu.my/65094/ http://irep.iium.edu.my/65094/1/65094_Optimization%20of%20TiO2_article.pdf http://irep.iium.edu.my/65094/2/65094_Optimization%20of%20TiO2_scopus.pdf http://irep.iium.edu.my/65094/13/65094_Optimization%20of%20TiO2%20thin_WOS.pdf
first_indexed	2023-09-18T21:32:21Z
last_indexed	2023-09-18T21:32:21Z
_version_	1777412595110641664

Optimization of TiO2 thin film thickness for dye sensitized solar cell applications

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