Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells

Dye Sensitize Solar Cell (DSSC) is a photo electrochemical cell that has a comparative mechanism as photosynthesis in nature with effective electron separation, enabling the cell to perform well under overcast condition. In any case, unfortunate recombination response of generated electrons with oxi...

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Main Author:	Muhammad, Nazalea Yazmin
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Dye-sensitized solar cells Quantum dots
Online Access:	http://psasir.upm.edu.my/id/eprint/98154/1/ITMA%202021%2013%20IR.pdf
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id	my-upm-ir.98154
record_format	uketd_dc
spelling	my-upm-ir.981542022-07-22T08:20:00Z Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells 2020-02 Muhammad, Nazalea Yazmin Dye Sensitize Solar Cell (DSSC) is a photo electrochemical cell that has a comparative mechanism as photosynthesis in nature with effective electron separation, enabling the cell to perform well under overcast condition. In any case, unfortunate recombination response of generated electrons with oxidized species has limited the advancement of high performing DSSC. The recombination process can be limited by integrating photoanode film with a thickness smaller than electron diffusion length. However, a very thin photoanode film has low capability to confine light and anchor dye molecules. This study aims to improve the performance of DSSC through applying advanced material, Graphene Quantum Dots (GQDs) and Carbon Quantum Dots (CQDs) in the photoanode. Both known to have high electron mobility and high surface area with good photoluminescence properties make it a right decision to choose it as enhancer for DSSC. Photoanode was immersed in the enhancer solution in a series of adsorption time. This is to identify the optimum adsorption time for the enhancer. It has been observed that adsorption of GQDs of 48 hours achieved the highest efficiency, which is at 4.53%. Besides that, the value of short circuit current (JSC), open circuit voltage (VOC) and fill factor (FF) is 12.26 mA cm-2, 0.72 V, 0.55 sequentially. Meanwhile, the adsorption time of CQDs reached the highest efficiency, which is at 3.50% also at 48 hours. In addition, the value of short circuit current (JSC), open circuit voltage (VOC) and fill factor (FF) is 10.01 mA cm-2, 0.68 V, 0.51 consequently. Both enhancers have been observed to successfully enhance the efficiency and performance of the cell with conventional DSSC fabricated in this laboratory. Dye-sensitized solar cells Quantum dots 2020-02 Thesis http://psasir.upm.edu.my/id/eprint/98154/ http://psasir.upm.edu.my/id/eprint/98154/1/ITMA%202021%2013%20IR.pdf text en public masters Universiti Putra Malaysia Dye-sensitized solar cells Quantum dots Mohtar, Mohd Nazim
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Mohtar, Mohd Nazim
topic	Dye-sensitized solar cells Quantum dots
spellingShingle	Dye-sensitized solar cells Quantum dots Muhammad, Nazalea Yazmin Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
description	Dye Sensitize Solar Cell (DSSC) is a photo electrochemical cell that has a comparative mechanism as photosynthesis in nature with effective electron separation, enabling the cell to perform well under overcast condition. In any case, unfortunate recombination response of generated electrons with oxidized species has limited the advancement of high performing DSSC. The recombination process can be limited by integrating photoanode film with a thickness smaller than electron diffusion length. However, a very thin photoanode film has low capability to confine light and anchor dye molecules. This study aims to improve the performance of DSSC through applying advanced material, Graphene Quantum Dots (GQDs) and Carbon Quantum Dots (CQDs) in the photoanode. Both known to have high electron mobility and high surface area with good photoluminescence properties make it a right decision to choose it as enhancer for DSSC. Photoanode was immersed in the enhancer solution in a series of adsorption time. This is to identify the optimum adsorption time for the enhancer. It has been observed that adsorption of GQDs of 48 hours achieved the highest efficiency, which is at 4.53%. Besides that, the value of short circuit current (JSC), open circuit voltage (VOC) and fill factor (FF) is 12.26 mA cm-2, 0.72 V, 0.55 sequentially. Meanwhile, the adsorption time of CQDs reached the highest efficiency, which is at 3.50% also at 48 hours. In addition, the value of short circuit current (JSC), open circuit voltage (VOC) and fill factor (FF) is 10.01 mA cm-2, 0.68 V, 0.51 consequently. Both enhancers have been observed to successfully enhance the efficiency and performance of the cell with conventional DSSC fabricated in this laboratory.
format	Thesis
qualification_level	Master's degree
author	Muhammad, Nazalea Yazmin
author_facet	Muhammad, Nazalea Yazmin
author_sort	Muhammad, Nazalea Yazmin
title	Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
title_short	Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
title_full	Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
title_fullStr	Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
title_full_unstemmed	Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
title_sort	effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells
granting_institution	Universiti Putra Malaysia
publishDate	2020
url	http://psasir.upm.edu.my/id/eprint/98154/1/ITMA%202021%2013%20IR.pdf
_version_	1747813844517912576

Effect of carbon quantum and graphene quantum dots on efficiency of dye-sensitized solar cells

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