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Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation

Emily M. Speller, Andrew J. Clarke, Nicholas Aristidou, Mark F. Wyatt, Laia Francàs, George Fish, Hyojung Cha, Harrison Ka Hin Lee, Joel Luke, Andrew Wadsworth, Alex D. Evans, Iain McCulloch, Ji-Seon Kim, Saif A. Haque, James Durrant Orcid Logo, Stoichko Dimitrov Orcid Logo, Wing C. Tsoi, Zhe Li, Wing Chung Tsoi Orcid Logo

ACS Energy Letters, Pages: 846 - 852

Swansea University Authors: James Durrant Orcid Logo, Stoichko Dimitrov Orcid Logo, Wing Chung Tsoi Orcid Logo

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DOI (Published version): 10.1021/acsenergylett.9b00109

Abstract

With the emergence of nonfullerene electron acceptors resulting in further breakthroughs in the performance of organic solar cells, there is now an urgent need to understand their degradation mechanisms in order to improve their intrinsic stability through better material design. In this study, we p...

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Published in: ACS Energy Letters
ISSN: 2380-8195 2380-8195
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49621
first_indexed 2019-03-19T13:59:06Z
last_indexed 2019-04-15T09:28:27Z
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spelling 2019-04-11T15:14:51.9136768 v2 49621 2019-03-19 Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 9fc26ec1b8655cd0d66f7196a924fe14 0000-0002-1564-7080 Stoichko Dimitrov Stoichko Dimitrov true false 7e5f541df6635a9a8e1a579ff2de5d56 0000-0003-3836-5139 Wing Chung Tsoi Wing Chung Tsoi true false 2019-03-19 EAAS With the emergence of nonfullerene electron acceptors resulting in further breakthroughs in the performance of organic solar cells, there is now an urgent need to understand their degradation mechanisms in order to improve their intrinsic stability through better material design. In this study, we present quantitative evidence for a common root cause of light-induced degradation of polymer:nonfullerene and polymer:fullerene organic solar cells in air, namely, a fast photo-oxidation process of the photoactive materials mediated by the formation of superoxide radical ions, whose yield is found to be strongly controlled by the lowest unoccupied molecular orbital (LUMO) levels of the electron acceptors used. Our results elucidate the general relevance of this degradation mechanism to both polymer:fullerene and polymer:nonfullerene blends and highlight the necessity of designing electron acceptor materials with sufficient electron affinities to overcome this challenge, thereby paving the way toward achieving long-term solar cell stability with minimal device encapsulation. Journal Article ACS Energy Letters 846 852 2380-8195 2380-8195 31 12 2019 2019-12-31 10.1021/acsenergylett.9b00109 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University 2019-04-11T15:14:51.9136768 2019-03-19T11:50:54.9207616 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Emily M. Speller 1 Andrew J. Clarke 2 Nicholas Aristidou 3 Mark F. Wyatt 4 Laia Francàs 5 George Fish 6 Hyojung Cha 7 Harrison Ka Hin Lee 8 Joel Luke 9 Andrew Wadsworth 10 Alex D. Evans 11 Iain McCulloch 12 Ji-Seon Kim 13 Saif A. Haque 14 James Durrant 0000-0001-8353-7345 15 Stoichko Dimitrov 0000-0002-1564-7080 16 Wing C. Tsoi 17 Zhe Li 18 Wing Chung Tsoi 0000-0003-3836-5139 19 0049621-19032019115241.pdf speller2019.pdf 2019-03-19T11:52:41.3300000 Output 585937 application/pdf Accepted Manuscript true 2020-03-12T00:00:00.0000000 true eng
title Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
spellingShingle Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
James Durrant
Stoichko Dimitrov
Wing Chung Tsoi
title_short Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
title_full Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
title_fullStr Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
title_full_unstemmed Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
title_sort Toward Improved Environmental Stability of Polymer:Fullerene and Polymer:Nonfullerene Organic Solar Cells: A Common Energetic Origin of Light- and Oxygen-Induced Degradation
author_id_str_mv f3dd64bc260e5c07adfa916c27dbd58a
9fc26ec1b8655cd0d66f7196a924fe14
7e5f541df6635a9a8e1a579ff2de5d56
author_id_fullname_str_mv f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
9fc26ec1b8655cd0d66f7196a924fe14_***_Stoichko Dimitrov
7e5f541df6635a9a8e1a579ff2de5d56_***_Wing Chung Tsoi
author James Durrant
Stoichko Dimitrov
Wing Chung Tsoi
author2 Emily M. Speller
Andrew J. Clarke
Nicholas Aristidou
Mark F. Wyatt
Laia Francàs
George Fish
Hyojung Cha
Harrison Ka Hin Lee
Joel Luke
Andrew Wadsworth
Alex D. Evans
Iain McCulloch
Ji-Seon Kim
Saif A. Haque
James Durrant
Stoichko Dimitrov
Wing C. Tsoi
Zhe Li
Wing Chung Tsoi
format Journal article
container_title ACS Energy Letters
container_start_page 846
publishDate 2019
institution Swansea University
issn 2380-8195
2380-8195
doi_str_mv 10.1021/acsenergylett.9b00109
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 With the emergence of nonfullerene electron acceptors resulting in further breakthroughs in the performance of organic solar cells, there is now an urgent need to understand their degradation mechanisms in order to improve their intrinsic stability through better material design. In this study, we present quantitative evidence for a common root cause of light-induced degradation of polymer:nonfullerene and polymer:fullerene organic solar cells in air, namely, a fast photo-oxidation process of the photoactive materials mediated by the formation of superoxide radical ions, whose yield is found to be strongly controlled by the lowest unoccupied molecular orbital (LUMO) levels of the electron acceptors used. Our results elucidate the general relevance of this degradation mechanism to both polymer:fullerene and polymer:nonfullerene blends and highlight the necessity of designing electron acceptor materials with sufficient electron affinities to overcome this challenge, thereby paving the way toward achieving long-term solar cell stability with minimal device encapsulation.
published_date 2019-12-31T19:42:14Z
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score 11.04748

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