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Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction

Tian Du, Weidong Xu, Shengda Xu, Sinclair R. Ratnasingham, Chieh-Ting Lin, Jinhyun Kim, Joe Briscoe, Martyn A. McLachlan, James Durrant Orcid Logo

Journal of Materials Chemistry C, Volume: 8, Issue: 36, Pages: 12648 - 12655

Swansea University Author: James Durrant Orcid Logo

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DOI (Published version): 10.1039/d0tc03390a

Abstract

Photoactive layer thickness is a key parameter for optimization of photovoltaic power conversion efficiency (PCE), yet its impact on charge extraction and recombination hasn’t been fully understood in perovskite solar cells (PSCs). Herein we find that in planar PSCs the perovskite thickness yielding...

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Published in: Journal of Materials Chemistry C
ISSN: 2050-7526 2050-7534
Published: Royal Society of Chemistry (RSC) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa55400
first_indexed 2020-10-12T11:29:15Z
last_indexed 2021-08-30T03:17:25Z
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spelling 2021-08-29T14:45:19.0206363 v2 55400 2020-10-12 Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2020-10-12 EAAS Photoactive layer thickness is a key parameter for optimization of photovoltaic power conversion efficiency (PCE), yet its impact on charge extraction and recombination hasn’t been fully understood in perovskite solar cells (PSCs). Herein we find that in planar PSCs the perovskite thickness yielding maximal PCE is strongly light-intensity dependent. Whilst under 1 sun irradiation the PCE is relatively invariant for perovskite thicknesses between 250 to 750 nm, at lower light intensities (0.1–0.5 sun) the thickest devices yield strongly enhanced PCE, but at higher light intensities (>1 sun) the thinnest devices give optimal PCE. Our results unravel that increased perovskite thickness leads to enhanced light absorption, reduced interfacial recombination at open circuit but greater bimolecular recombination losses at short circuit thus is suitable for devices working under weak illumination, typical of many real-world applications. Reducing perovskite thickness, however, shows the contrast trend and is suitable for PSCs working under concentrated illumination. Journal Article Journal of Materials Chemistry C 8 36 12648 12655 Royal Society of Chemistry (RSC) 2050-7526 2050-7534 28 9 2020 2020-09-28 10.1039/d0tc03390a COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University EPSRC, NRF EP/P032591/1, NRF-2017K1A1A2013153, EP/L016702/1 2021-08-29T14:45:19.0206363 2020-10-12T12:27:01.7555774 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Tian Du 1 Weidong Xu 2 Shengda Xu 3 Sinclair R. Ratnasingham 4 Chieh-Ting Lin 5 Jinhyun Kim 6 Joe Briscoe 7 Martyn A. McLachlan 8 James Durrant 0000-0001-8353-7345 9 55400__18408__99336e3c7f8e4edeacf88597513129c3.pdf 55400.pdf 2020-10-12T12:28:33.5182133 Output 4152550 application/pdf Version of Record true © 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution -NonCommercial 3.0 Unported Licence true eng http://creativecommons.org/licenses/by-nc/3.0/
title Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
spellingShingle Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
James Durrant
title_short Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
title_full Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
title_fullStr Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
title_full_unstemmed Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
title_sort Light-intensity and thickness dependent efficiency of planar perovskite solar cells: charge recombination versus extraction
author_id_str_mv f3dd64bc260e5c07adfa916c27dbd58a
author_id_fullname_str_mv f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
author James Durrant
author2 Tian Du
Weidong Xu
Shengda Xu
Sinclair R. Ratnasingham
Chieh-Ting Lin
Jinhyun Kim
Joe Briscoe
Martyn A. McLachlan
James Durrant
format Journal article
container_title Journal of Materials Chemistry C
container_volume 8
container_issue 36
container_start_page 12648
publishDate 2020
institution Swansea University
issn 2050-7526
2050-7534
doi_str_mv 10.1039/d0tc03390a
publisher Royal Society of Chemistry (RSC)
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 Photoactive layer thickness is a key parameter for optimization of photovoltaic power conversion efficiency (PCE), yet its impact on charge extraction and recombination hasn’t been fully understood in perovskite solar cells (PSCs). Herein we find that in planar PSCs the perovskite thickness yielding maximal PCE is strongly light-intensity dependent. Whilst under 1 sun irradiation the PCE is relatively invariant for perovskite thicknesses between 250 to 750 nm, at lower light intensities (0.1–0.5 sun) the thickest devices yield strongly enhanced PCE, but at higher light intensities (>1 sun) the thinnest devices give optimal PCE. Our results unravel that increased perovskite thickness leads to enhanced light absorption, reduced interfacial recombination at open circuit but greater bimolecular recombination losses at short circuit thus is suitable for devices working under weak illumination, typical of many real-world applications. Reducing perovskite thickness, however, shows the contrast trend and is suitable for PSCs working under concentrated illumination.
published_date 2020-09-28T02:13:05Z
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score 11.04748

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