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Ionic Influences on Recombination in Perovskite Solar Cells

Adam Pockett, Matt Carnie Orcid Logo

ACS Energy Letters, Volume: 2, Issue: 7, Pages: 1683 - 1689

Swansea University Authors: Adam Pockett, Matt Carnie Orcid Logo

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DOI (Published version): 10.1021/acsenergylett.7b00490

Abstract

The origins of recombination processes, particularly those that relate to IV hysteresis, are still unclear in perovskite solar cells. Of particular interest, is the impact different contact materials have on the level of hysteresis observed. This work shows that there is a clear link between ionic m...

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Published in: ACS Energy Letters
ISSN: 2380-8195 2380-8195
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa34445
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spelling 2021-01-14T13:06:26.2718480 v2 34445 2017-06-23 Ionic Influences on Recombination in Perovskite Solar Cells de06433fccc0514dcf45aa9d1fc5c60f Adam Pockett Adam Pockett true false 73b367694366a646b90bb15db32bb8c0 0000-0002-4232-1967 Matt Carnie Matt Carnie true false 2017-06-23 FGSEN The origins of recombination processes, particularly those that relate to IV hysteresis, are still unclear in perovskite solar cells. Of particular interest, is the impact different contact materials have on the level of hysteresis observed. This work shows that there is a clear link between ionic movement and interfacial recombination, which have both been shown to be responsible for hysteresis. By performing low temperature transient photovoltage (TPV) measurements over a period in which ions redistribute within the perovskite layer, the dominant recombination mechanism, responsible for hysteresis and other slow dynamic processes, is found to occur at the TiO2/perovskite interface. We observe an anomalous negative transient upon firing the laser pulse which we attribute to interfacial recombination at the TiO2/perovskite interface. The impact of recombination at the perovskite/HTL interface is shown to be negligible by performing TPV measurements using different laser wavelengths to probe different depths into the perovskite layer, as well as by changing the type of HTL used. Journal Article ACS Energy Letters 2 7 1683 1689 2380-8195 2380-8195 14 7 2017 2017-07-14 10.1021/acsenergylett.7b00490 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University RCUK, EP/N020863/1 2021-01-14T13:06:26.2718480 2017-06-23T10:33:35.3290247 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Adam Pockett 1 Matt Carnie 0000-0002-4232-1967 2 0034445-03072017095439.pdf acsenergylett.7b00490.pdf 2017-07-03T09:54:39.9170000 Output 1253262 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution (CC-BY) License. true eng http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html
title Ionic Influences on Recombination in Perovskite Solar Cells
spellingShingle Ionic Influences on Recombination in Perovskite Solar Cells
Adam Pockett
Matt Carnie
title_short Ionic Influences on Recombination in Perovskite Solar Cells
title_full Ionic Influences on Recombination in Perovskite Solar Cells
title_fullStr Ionic Influences on Recombination in Perovskite Solar Cells
title_full_unstemmed Ionic Influences on Recombination in Perovskite Solar Cells
title_sort Ionic Influences on Recombination in Perovskite Solar Cells
author_id_str_mv de06433fccc0514dcf45aa9d1fc5c60f
73b367694366a646b90bb15db32bb8c0
author_id_fullname_str_mv de06433fccc0514dcf45aa9d1fc5c60f_***_Adam Pockett
73b367694366a646b90bb15db32bb8c0_***_Matt Carnie
author Adam Pockett
Matt Carnie
author2 Adam Pockett
Matt Carnie
format Journal article
container_title ACS Energy Letters
container_volume 2
container_issue 7
container_start_page 1683
publishDate 2017
institution Swansea University
issn 2380-8195
2380-8195
doi_str_mv 10.1021/acsenergylett.7b00490
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 The origins of recombination processes, particularly those that relate to IV hysteresis, are still unclear in perovskite solar cells. Of particular interest, is the impact different contact materials have on the level of hysteresis observed. This work shows that there is a clear link between ionic movement and interfacial recombination, which have both been shown to be responsible for hysteresis. By performing low temperature transient photovoltage (TPV) measurements over a period in which ions redistribute within the perovskite layer, the dominant recombination mechanism, responsible for hysteresis and other slow dynamic processes, is found to occur at the TiO2/perovskite interface. We observe an anomalous negative transient upon firing the laser pulse which we attribute to interfacial recombination at the TiO2/perovskite interface. The impact of recombination at the perovskite/HTL interface is shown to be negligible by performing TPV measurements using different laser wavelengths to probe different depths into the perovskite layer, as well as by changing the type of HTL used.
published_date 2017-07-14T03:42:44Z
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score 10.997979

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