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Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging

George Koutsourakis Orcid Logo, Carys Worsley, Michael Spence, James C Blakesley, Trystan Watson Orcid Logo, Matt Carnie Orcid Logo, Fernando A Castro Orcid Logo

Journal of Physics: Energy, Volume: 5, Issue: 2, Start page: 025008

Swansea University Authors: Carys Worsley, Michael Spence, Trystan Watson Orcid Logo, Matt Carnie Orcid Logo

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DOI (Published version): 10.1088/2515-7655/acc892

Abstract

Metastability is a characteristic feature of perovskite solar cell (PSC) devices that affects powerrating measurements and general electrical behaviour. In this work the metastability of differenttypes of PSC devices is investigated through current–voltage (I–V) testing and voltage dependentphotolum...

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Published in: Journal of Physics: Energy
ISSN: 2515-7655
Published: IOP Publishing 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa66403
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In this work the metastability of differenttypes of PSC devices is investigated through current&#x2013;voltage (I&#x2013;V) testing and voltage dependentphotoluminescence (PL-V) imaging. We show that advanced I&#x2013;V parameter acquisition methodsneed to be applied for accurate PSC performance evaluation, and that misleading results can beobtained when using simple fast I&#x2013;V curves, which can lead to incorrect estimation of cellefficiency. The method, as applied in this work, can also distinguish between metastability anddegradation, which is a crucial step towards reporting stabilised efficiencies of PSC devices. PL-V isthen used to investigate temporal and spatial PL response at different voltage steps. In addition tothe impact on current response, metastability effects are clearly observed in the spatial PL responseof different types of PSCs. The results imply that a high density of local defects andnon-uniformities leads to increased lateral metastability visible in PL-V measurements, which isdirectly linked to electrical metastability. 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spelling 2024-06-19T15:40:39.7439147 v2 66403 2024-05-13 Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging e74e27838a54d9df1fe7c5ee2cb8a126 Carys Worsley Carys Worsley true false 801454eb7d42eeb5165b73fb362381ee Michael Spence Michael Spence true false a210327b52472cfe8df9b8108d661457 0000-0002-8015-1436 Trystan Watson Trystan Watson true false 73b367694366a646b90bb15db32bb8c0 0000-0002-4232-1967 Matt Carnie Matt Carnie true false 2024-05-13 EAAS Metastability is a characteristic feature of perovskite solar cell (PSC) devices that affects powerrating measurements and general electrical behaviour. In this work the metastability of differenttypes of PSC devices is investigated through current–voltage (I–V) testing and voltage dependentphotoluminescence (PL-V) imaging. We show that advanced I–V parameter acquisition methodsneed to be applied for accurate PSC performance evaluation, and that misleading results can beobtained when using simple fast I–V curves, which can lead to incorrect estimation of cellefficiency. The method, as applied in this work, can also distinguish between metastability anddegradation, which is a crucial step towards reporting stabilised efficiencies of PSC devices. PL-V isthen used to investigate temporal and spatial PL response at different voltage steps. In addition tothe impact on current response, metastability effects are clearly observed in the spatial PL responseof different types of PSCs. The results imply that a high density of local defects andnon-uniformities leads to increased lateral metastability visible in PL-V measurements, which isdirectly linked to electrical metastability. This work indicates that existing quantitative PL imagingmethods and point-based PL measurements of PSC devices may need to be revisited, asassumptions such as the absence of lateral currents or uniform voltage bias across a cell area maynot be valid. Journal Article Journal of Physics: Energy 5 2 025008 IOP Publishing 2515-7655 perovskite solar cells, measurements, photoluminescence imaging, metastability 11 4 2023 2023-04-11 10.1088/2515-7655/acc892 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University Other The work was co-funded by the UK Engineering and Physical Sciences Research Council (EPSRC) funded project ‘Application Targeted and Integrated Photovoltaics (ATIP)’ (Grant No. EP/T028513/1) and by the Department for Science, Innovation & Technology (UK) through the National Measurement System. 2024-06-19T15:40:39.7439147 2024-05-13T16:46:21.7467486 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering George Koutsourakis 0000-0002-5552-1749 1 Carys Worsley 2 Michael Spence 3 James C Blakesley 4 Trystan Watson 0000-0002-8015-1436 5 Matt Carnie 0000-0002-4232-1967 6 Fernando A Castro 0000-0002-2409-8300 7 66403__30341__acfe73842a7b4eb1b510f0610211a21d.pdf 66403.VOR.pdf 2024-05-13T16:52:28.1552709 Output 11892081 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution CC-BY 4.0 licence. true eng http://creativecommons.org/licenses/by/4.0/
title Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
spellingShingle Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
Carys Worsley
Michael Spence
Trystan Watson
Matt Carnie
title_short Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
title_full Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
title_fullStr Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
title_full_unstemmed Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
title_sort Investigating spatial macroscopic metastability of perovskite solar cells with voltage dependent photoluminescence imaging
author_id_str_mv e74e27838a54d9df1fe7c5ee2cb8a126
801454eb7d42eeb5165b73fb362381ee
a210327b52472cfe8df9b8108d661457
73b367694366a646b90bb15db32bb8c0
author_id_fullname_str_mv e74e27838a54d9df1fe7c5ee2cb8a126_***_Carys Worsley
801454eb7d42eeb5165b73fb362381ee_***_Michael Spence
a210327b52472cfe8df9b8108d661457_***_Trystan Watson
73b367694366a646b90bb15db32bb8c0_***_Matt Carnie
author Carys Worsley
Michael Spence
Trystan Watson
Matt Carnie
author2 George Koutsourakis
Carys Worsley
Michael Spence
James C Blakesley
Trystan Watson
Matt Carnie
Fernando A Castro
format Journal article
container_title Journal of Physics: Energy
container_volume 5
container_issue 2
container_start_page 025008
publishDate 2023
institution Swansea University
issn 2515-7655
doi_str_mv 10.1088/2515-7655/acc892
publisher IOP Publishing
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 Metastability is a characteristic feature of perovskite solar cell (PSC) devices that affects powerrating measurements and general electrical behaviour. In this work the metastability of differenttypes of PSC devices is investigated through current–voltage (I–V) testing and voltage dependentphotoluminescence (PL-V) imaging. We show that advanced I–V parameter acquisition methodsneed to be applied for accurate PSC performance evaluation, and that misleading results can beobtained when using simple fast I–V curves, which can lead to incorrect estimation of cellefficiency. The method, as applied in this work, can also distinguish between metastability anddegradation, which is a crucial step towards reporting stabilised efficiencies of PSC devices. PL-V isthen used to investigate temporal and spatial PL response at different voltage steps. In addition tothe impact on current response, metastability effects are clearly observed in the spatial PL responseof different types of PSCs. The results imply that a high density of local defects andnon-uniformities leads to increased lateral metastability visible in PL-V measurements, which isdirectly linked to electrical metastability. This work indicates that existing quantitative PL imagingmethods and point-based PL measurements of PSC devices may need to be revisited, asassumptions such as the absence of lateral currents or uniform voltage bias across a cell area maynot be valid.
published_date 2023-04-11T05:29:35Z
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score 11.048994

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