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Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction

Stefan Zeiske, Oskar Sandberg Orcid Logo, Jona Kurpiers, Safa Shoaee Orcid Logo, Paul Meredith Orcid Logo, Ardalan Armin Orcid Logo

ACS Photonics, Volume: 9, Issue: 4, Pages: 1188 - 1195

Swansea University Authors: Stefan Zeiske, Oskar Sandberg Orcid Logo, Paul Meredith Orcid Logo, Ardalan Armin Orcid Logo

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Abstract

The photogeneration of free charges in light-harvesting devices is a multistep process, which can be challenging to probe due to the complexity of contributing energetic states and the competitive character of different driving mechanisms. In this contribution, we advance a technique, integral-mode...

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Published in: ACS Photonics
ISSN: 2330-4022 2330-4022
Published: American Chemical Society (ACS) 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa59906
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spelling 2022-06-06T17:45:01.6263163 v2 59906 2022-04-25 Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction 0c9c5b89df9ac882c3e09dd1a9f28fc5 Stefan Zeiske Stefan Zeiske true false 9e91512a54d5aee66cd77851a96ba747 0000-0003-3778-8746 Oskar Sandberg Oskar Sandberg true false 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2022-04-25 SPH The photogeneration of free charges in light-harvesting devices is a multistep process, which can be challenging to probe due to the complexity of contributing energetic states and the competitive character of different driving mechanisms. In this contribution, we advance a technique, integral-mode transient charge extraction (ITCE), to probe these processes in thin-film solar cells. ITCE combines capacitance measurements with the integral-mode time-of-flight method in the low intensity regime of sandwich-type thin-film devices and allows for the sensitive determination of photogenerated charge-carrier densities. We verify the theoretical framework of our method by drift-diffusion simulations and demonstrate the applicability of ITCE to organic and perovskite semiconductor-based thin-film solar cells. Furthermore, we examine the field dependence of charge generation efficiency and find our ITCE results to be in excellent agreement with those obtained via time-delayed collection field measurements conducted on the same devices. Journal Article ACS Photonics 9 4 1188 1195 American Chemical Society (ACS) 2330-4022 2330-4022 charge generation, thin-film solar cells, organic semiconductors, perovskite semiconductors, external generation efficiency 20 4 2022 2022-04-20 10.1021/acsphotonics.1c01532 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University SU Library paid the OA fee (TA Institutional Deal) Swansea University Alexander von Humboldt-Stiftung UK Research and Innovation - EP/T028511/1; Engineering Research Network Wales European Regional Development Fund 2022-06-06T17:45:01.6263163 2022-04-25T12:49:50.5254477 College of Science Physics Stefan Zeiske 1 Oskar Sandberg 0000-0003-3778-8746 2 Jona Kurpiers 3 Safa Shoaee 0000-0001-5754-834x 4 Paul Meredith 0000-0002-9049-7414 5 Ardalan Armin 0000-0002-6129-5354 6 59906__24239__912bbe3e04a84040bc75493cd07e8dbb.pdf 59906.pdf 2022-06-06T17:43:08.5648347 Output 9461829 application/pdf Version of Record true Released under the terms of a Creative Commons Attribution 4.0 International (CC BY 4.0) License true eng https://creativecommons.org/licenses/by/4.0/
title Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
spellingShingle Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
Stefan Zeiske
Oskar Sandberg
Paul Meredith
Ardalan Armin
title_short Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
title_full Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
title_fullStr Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
title_full_unstemmed Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
title_sort Probing Charge Generation Efficiency in Thin-Film Solar Cells by Integral-Mode Transient Charge Extraction
author_id_str_mv 0c9c5b89df9ac882c3e09dd1a9f28fc5
9e91512a54d5aee66cd77851a96ba747
31e8fe57fa180d418afd48c3af280c2e
22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv 0c9c5b89df9ac882c3e09dd1a9f28fc5_***_Stefan Zeiske
9e91512a54d5aee66cd77851a96ba747_***_Oskar Sandberg
31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
22b270622d739d81e131bec7a819e2fd_***_Ardalan Armin
author Stefan Zeiske
Oskar Sandberg
Paul Meredith
Ardalan Armin
author2 Stefan Zeiske
Oskar Sandberg
Jona Kurpiers
Safa Shoaee
Paul Meredith
Ardalan Armin
format Journal article
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container_volume 9
container_issue 4
container_start_page 1188
publishDate 2022
institution Swansea University
issn 2330-4022
2330-4022
doi_str_mv 10.1021/acsphotonics.1c01532
publisher American Chemical Society (ACS)
college_str College of Science
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description The photogeneration of free charges in light-harvesting devices is a multistep process, which can be challenging to probe due to the complexity of contributing energetic states and the competitive character of different driving mechanisms. In this contribution, we advance a technique, integral-mode transient charge extraction (ITCE), to probe these processes in thin-film solar cells. ITCE combines capacitance measurements with the integral-mode time-of-flight method in the low intensity regime of sandwich-type thin-film devices and allows for the sensitive determination of photogenerated charge-carrier densities. We verify the theoretical framework of our method by drift-diffusion simulations and demonstrate the applicability of ITCE to organic and perovskite semiconductor-based thin-film solar cells. Furthermore, we examine the field dependence of charge generation efficiency and find our ITCE results to be in excellent agreement with those obtained via time-delayed collection field measurements conducted on the same devices.
published_date 2022-04-20T04:17:24Z
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