Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film

A dye-sensitized solar cell (DSC) is the third generation of solar technology, utilizing TiO2 nanoparticles with sizes of 20�30 nm as the photoelectrode material. The integration of smaller nanoparticles has the advantage of providing a larger surface area, yet the presence of grain boundaries is...

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Main Authors: Zaine, S.N.A., Mohamed, N.M., Khatani, M., Shahid, M.U.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.29603 /
Published: MDPI 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121594322&doi=10.3390%2fcoatings11121442&partnerID=40&md5=6f0a1c8198b1067a7be1a6c91af23014
http://eprints.utp.edu.my/29603/
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spelling utp-eprints.296032022-03-25T02:10:34Z Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film Zaine, S.N.A. Mohamed, N.M. Khatani, M. Shahid, M.U. A dye-sensitized solar cell (DSC) is the third generation of solar technology, utilizing TiO2 nanoparticles with sizes of 20�30 nm as the photoelectrode material. The integration of smaller nanoparticles has the advantage of providing a larger surface area, yet the presence of grain boundaries is inevitable, resulting in a higher probability of electron trapping. This study reports on the improvement of charge transport through the integration of quantum dot (QD) TiO2 with a size of less than 10 nm as the dye absorption photoelectrode layer. The QD TiO2 samples were synthesized through sol�gel and reflux methods in a controlled pH solution without surfactants. The synthesized samples were analyzed using microscopic, diffraction, absorption, as well as spectroscopic analyses. A current�voltage and impedance analysis was used to evaluate the performance of a DSC integrated with synthesized TiO2 as the photoelectrode material. The sample with smaller crystallite structures led to a large surface area and exhibited a higher dye absorption capability. Interestingly, a DSC integrated with QD TiO2 showed a higher steady-state electron density and a lower electron recombination rate. The shallow distribution of the trap state led to an improvement of the electron trapping/de-trapping process between the Fermi level and the conduction band of oxide photoelectrode material, hence improving the lifetime of generated electrons and the overall performance of the DSC. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). MDPI 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121594322&doi=10.3390%2fcoatings11121442&partnerID=40&md5=6f0a1c8198b1067a7be1a6c91af23014 Zaine, S.N.A. and Mohamed, N.M. and Khatani, M. and Shahid, M.U. (2021) Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film. Coatings, 11 (12). http://eprints.utp.edu.my/29603/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description A dye-sensitized solar cell (DSC) is the third generation of solar technology, utilizing TiO2 nanoparticles with sizes of 20�30 nm as the photoelectrode material. The integration of smaller nanoparticles has the advantage of providing a larger surface area, yet the presence of grain boundaries is inevitable, resulting in a higher probability of electron trapping. This study reports on the improvement of charge transport through the integration of quantum dot (QD) TiO2 with a size of less than 10 nm as the dye absorption photoelectrode layer. The QD TiO2 samples were synthesized through sol�gel and reflux methods in a controlled pH solution without surfactants. The synthesized samples were analyzed using microscopic, diffraction, absorption, as well as spectroscopic analyses. A current�voltage and impedance analysis was used to evaluate the performance of a DSC integrated with synthesized TiO2 as the photoelectrode material. The sample with smaller crystallite structures led to a large surface area and exhibited a higher dye absorption capability. Interestingly, a DSC integrated with QD TiO2 showed a higher steady-state electron density and a lower electron recombination rate. The shallow distribution of the trap state led to an improvement of the electron trapping/de-trapping process between the Fermi level and the conduction band of oxide photoelectrode material, hence improving the lifetime of generated electrons and the overall performance of the DSC. © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
format Article
author Zaine, S.N.A.
Mohamed, N.M.
Khatani, M.
Shahid, M.U.
spellingShingle Zaine, S.N.A.
Mohamed, N.M.
Khatani, M.
Shahid, M.U.
Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
author_sort Zaine, S.N.A.
title Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
title_short Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
title_full Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
title_fullStr Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
title_full_unstemmed Enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
title_sort enhancement of charge transport of a dye-sensitized solar cell utilizing tio2 quantum dot photoelectrode film
publisher MDPI
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121594322&doi=10.3390%2fcoatings11121442&partnerID=40&md5=6f0a1c8198b1067a7be1a6c91af23014
http://eprints.utp.edu.my/29603/
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score 11.62408

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