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Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells

Mohan Raj Subramaniam, Duraisamy Kumaresan, Sathiskumar Jothi Orcid Logo, James D. McGettrick, Trystan Watson Orcid Logo

Applied Surface Science, Volume: 428, Pages: 439 - 447

Swansea University Authors: Sathiskumar Jothi Orcid Logo, Trystan Watson Orcid Logo

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DOI (Published version): 10.1016/j.apsusc.2017.09.142

Abstract

Three dimensional hierarchical TiO2 nanorods-reduced graphene oxide (HTNs-rGO) composites with different rGO wt% were directly grown on conducting glass substrate by an in situ hydrothermal process for improved charge separation and collection in dye sensitized solar cells (DSSCs). The crystal struc...

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Published in: Applied Surface Science
ISSN: 0169-4332
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa35621
first_indexed 2017-09-25T13:07:15Z
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spelling 2020-06-02T15:24:18.6213010 v2 35621 2017-09-25 Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells 6cd28300413d3e63178f0bf7e2130569 0000-0001-7328-1112 Sathiskumar Jothi Sathiskumar Jothi true false a210327b52472cfe8df9b8108d661457 0000-0002-8015-1436 Trystan Watson Trystan Watson true false 2017-09-25 Three dimensional hierarchical TiO2 nanorods-reduced graphene oxide (HTNs-rGO) composites with different rGO wt% were directly grown on conducting glass substrate by an in situ hydrothermal process for improved charge separation and collection in dye sensitized solar cells (DSSCs). The crystal structure and chemical composition of as grown composites were confirmed by X-ray diffraction and optical studies. Electron microscopic studies on the composites surface morphologies revealed the formation of rGO wrapped or intertwined HTNs architectures onto the FTO substrates with thicknesses ranging from 14.33 to 15.70 μm. 2 wt% rGO loaded HTNs composite photoanode showed a superior power conversion efficiency of 4.54% as compared to the other wt% rGO loaded HTNs composite and bare HTNs photoanodes in DSSCs. This is due to optimal loading of rGO facilitating formation of a better charge transport channel within HTNs matrix and reducing charge transport resistance (Rtr), which resulted in a higher charge collection of HTNs-rGO composite. Besides, the solar cell current-voltage (J-V) and electrochemical impedance characterizations confirmed the superior light scattering and dye loading capabilities of HTNs, together with a low charge transport resistance and improved charge carrier lifetime in HTNs-rGO composites contributed to the photovoltaic performance enhancement of their DSSCs. Reduced graphene oxide incorporated hierarchical TiO2 nanorods based nanocomposites for improving the charge collection efficiency and photovoltaic performance in dye sensitized solar cells are introduced. Journal Article Applied Surface Science 428 439 447 0169-4332 Hierarchical TiO2 nanorods; reduced graphene oxide; hydrothermal; charge collection efficiency; dye-sensitized solar cells 15 1 2018 2018-01-15 10.1016/j.apsusc.2017.09.142 COLLEGE NANME COLLEGE CODE Swansea University 2020-06-02T15:24:18.6213010 2017-09-25T09:39:17.1019935 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Mohan Raj Subramaniam 1 Duraisamy Kumaresan 2 Sathiskumar Jothi 0000-0001-7328-1112 3 James D. McGettrick 4 Trystan Watson 0000-0002-8015-1436 5 0035621-25092017094130.pdf subramaniam2017.pdf 2017-09-25T09:41:30.3270000 Output 1424932 application/pdf Accepted Manuscript true 2018-09-21T00:00:00.0000000 true eng
title Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
spellingShingle Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
Sathiskumar Jothi
Trystan Watson
title_short Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
title_full Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
title_fullStr Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
title_full_unstemmed Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
title_sort Reduced graphene oxide wrapped hierarchical TiO 2 nanorod composites for improved charge collection efficiency and carrier lifetime in dye sensitized solar cells
author_id_str_mv 6cd28300413d3e63178f0bf7e2130569
a210327b52472cfe8df9b8108d661457
author_id_fullname_str_mv 6cd28300413d3e63178f0bf7e2130569_***_Sathiskumar Jothi
a210327b52472cfe8df9b8108d661457_***_Trystan Watson
author Sathiskumar Jothi
Trystan Watson
author2 Mohan Raj Subramaniam
Duraisamy Kumaresan
Sathiskumar Jothi
James D. McGettrick
Trystan Watson
format Journal article
container_title Applied Surface Science
container_volume 428
container_start_page 439
publishDate 2018
institution Swansea University
issn 0169-4332
doi_str_mv 10.1016/j.apsusc.2017.09.142
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Three dimensional hierarchical TiO2 nanorods-reduced graphene oxide (HTNs-rGO) composites with different rGO wt% were directly grown on conducting glass substrate by an in situ hydrothermal process for improved charge separation and collection in dye sensitized solar cells (DSSCs). The crystal structure and chemical composition of as grown composites were confirmed by X-ray diffraction and optical studies. Electron microscopic studies on the composites surface morphologies revealed the formation of rGO wrapped or intertwined HTNs architectures onto the FTO substrates with thicknesses ranging from 14.33 to 15.70 μm. 2 wt% rGO loaded HTNs composite photoanode showed a superior power conversion efficiency of 4.54% as compared to the other wt% rGO loaded HTNs composite and bare HTNs photoanodes in DSSCs. This is due to optimal loading of rGO facilitating formation of a better charge transport channel within HTNs matrix and reducing charge transport resistance (Rtr), which resulted in a higher charge collection of HTNs-rGO composite. Besides, the solar cell current-voltage (J-V) and electrochemical impedance characterizations confirmed the superior light scattering and dye loading capabilities of HTNs, together with a low charge transport resistance and improved charge carrier lifetime in HTNs-rGO composites contributed to the photovoltaic performance enhancement of their DSSCs. Reduced graphene oxide incorporated hierarchical TiO2 nanorods based nanocomposites for improving the charge collection efficiency and photovoltaic performance in dye sensitized solar cells are introduced.
published_date 2018-01-15T19:12:53Z
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