Photocapacitive CdS/WOx nanostructures for solar energy storage

Jones, Daniel; Phillips, Robert; F., William J.; Rome, Bertrand; Warwick, Michael; Dunnill, Charlie

doi:10.1038/s41598-019-48069-5

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Photocapacitive CdS/WOx nanostructures for solar energy storage

Daniel Jones, Robert Phillips, William J. F. Gannon, Bertrand Rome, Michael Warwick

, Charlie Dunnill

Scientific Reports, Volume: 9, Issue: 1

Swansea University Authors: Daniel Jones, Michael Warwick , Charlie Dunnill

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DOI (Published version): 10.1038/s41598-019-48069-5

Abstract

Through a facile solvothermal procedure, a CdS/WOx nanocomposite has been synthesised which exhibits photocapacitive behaviour under white light illumination at a radiant flux density of 99.3 mW cm−2. Photoelectrochemical experiments were undertaken to examine the self-charging properties of the mat...

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Published in:	Scientific Reports
ISSN:	2045-2322
Published:	Springer Science and Business Media LLC 2019
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URI:	https://cronfa.swan.ac.uk/Record/cronfa51463
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first_indexed	2019-08-19T15:29:38Z
last_indexed	2023-01-11T14:28:14Z
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spelling	2022-12-06T16:50:14.4199721 v2 51463 2019-08-19 Photocapacitive CdS/WOx nanostructures for solar energy storage 88aaf2ee4c51d4405ef7f81e2e8f7bdb Daniel Jones Daniel Jones true false 9fdabb7283ffccc5898cc543305475cf 0000-0002-9028-1250 Michael Warwick Michael Warwick true false 0c4af8958eda0d2e914a5edc3210cd9e 0000-0003-4052-6931 Charlie Dunnill Charlie Dunnill true false 2019-08-19 MECH Through a facile solvothermal procedure, a CdS/WOx nanocomposite has been synthesised which exhibits photocapacitive behaviour under white light illumination at a radiant flux density of 99.3 mW cm−2. Photoelectrochemical experiments were undertaken to examine the self-charging properties of the material and to develop an understanding of the underlying electronic band structure responsible for the phenomenon. By employing XPS, UPS and UV-Vis diffuse reflectance spectroscopy for further characterisation, the ability of the composite to generate current following the removal of incident light was related to the trapping of photoexcited electrons by the WOx component. The presence of WOx yielded an order of magnitude increase in the transient photocurrent response relative to CdS alone, an effect attributed to the suppression of electron-hole recombination in CdS due to hole transfer across the CdS/WOx interface. Moreover, current discharge from the material persisted for more than twenty minutes after final illumination, an order of magnitude improvement over many existing binary composites. As a seminal investigation into the photocapacitive characteristics of CdS/WOx composites, the work offers insight into how the constituent materials might be utilised as part of a future self-charging solar device. Journal Article Scientific Reports 9 1 Springer Science and Business Media LLC 2045-2322 9 8 2019 2019-08-09 10.1038/s41598-019-48069-5 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2022-12-06T16:50:14.4199721 2019-08-19T09:41:02.8030955 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering Daniel Jones 1 Robert Phillips 2 William J. F. Gannon 3 Bertrand Rome 4 Michael Warwick 0000-0002-9028-1250 5 Charlie Dunnill 0000-0003-4052-6931 6 0051463-19082019094414.pdf jones2019(7)v2.pdf 2019-08-19T09:44:14.7770000 Output 2796145 application/pdf Version of Record true This article is licensed under a Creative Commons Attribution 4.0 International License true eng http://creativecommons.org/licenses/by/4.0/
title	Photocapacitive CdS/WOx nanostructures for solar energy storage
spellingShingle	Photocapacitive CdS/WOx nanostructures for solar energy storage Daniel Jones Michael Warwick Charlie Dunnill
title_short	Photocapacitive CdS/WOx nanostructures for solar energy storage
title_full	Photocapacitive CdS/WOx nanostructures for solar energy storage
title_fullStr	Photocapacitive CdS/WOx nanostructures for solar energy storage
title_full_unstemmed	Photocapacitive CdS/WOx nanostructures for solar energy storage
title_sort	Photocapacitive CdS/WOx nanostructures for solar energy storage
author_id_str_mv	88aaf2ee4c51d4405ef7f81e2e8f7bdb 9fdabb7283ffccc5898cc543305475cf 0c4af8958eda0d2e914a5edc3210cd9e
author_id_fullname_str_mv	88aaf2ee4c51d4405ef7f81e2e8f7bdb_*_Daniel Jones 9fdabb7283ffccc5898cc543305475cf__Michael Warwick 0c4af8958eda0d2e914a5edc3210cd9e_**_Charlie Dunnill
author	Daniel Jones Michael Warwick Charlie Dunnill
author2	Daniel Jones Robert Phillips William J. F. Gannon Bertrand Rome Michael Warwick Charlie Dunnill
format	Journal article
container_title	Scientific Reports
container_volume	9
container_issue	1
publishDate	2019
institution	Swansea University
issn	2045-2322
doi_str_mv	10.1038/s41598-019-48069-5
publisher	Springer Science and Business Media LLC
college_str	Faculty of Science and Engineering
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description	Through a facile solvothermal procedure, a CdS/WOx nanocomposite has been synthesised which exhibits photocapacitive behaviour under white light illumination at a radiant flux density of 99.3 mW cm−2. Photoelectrochemical experiments were undertaken to examine the self-charging properties of the material and to develop an understanding of the underlying electronic band structure responsible for the phenomenon. By employing XPS, UPS and UV-Vis diffuse reflectance spectroscopy for further characterisation, the ability of the composite to generate current following the removal of incident light was related to the trapping of photoexcited electrons by the WOx component. The presence of WOx yielded an order of magnitude increase in the transient photocurrent response relative to CdS alone, an effect attributed to the suppression of electron-hole recombination in CdS due to hole transfer across the CdS/WOx interface. Moreover, current discharge from the material persisted for more than twenty minutes after final illumination, an order of magnitude improvement over many existing binary composites. As a seminal investigation into the photocapacitive characteristics of CdS/WOx composites, the work offers insight into how the constituent materials might be utilised as part of a future self-charging solar device.
published_date	2019-08-09T04:03:21Z
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Photocapacitive CdS/WOx nanostructures for solar energy storage

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