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A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells

Furong Shi, Pengzhi Guo, Xianfeng Qiao, Guo Yao, Tao Zhang, Qi Lu, Qian Wang, Xiaofeng Wang, Jasurbek Rikhsibaev, Ergang Wang Orcid Logo, Chunfeng Zhang, Young‐Wan Kwon, Han Young Woo, Hongbin Wu, Jianhui Hou, Dongge Ma, Ardalan Armin Orcid Logo, Yuguang Ma, Yangjun Xia Orcid Logo

Advanced Materials, Volume: 35, Issue: 23

Swansea University Author: Ardalan Armin Orcid Logo

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DOI (Published version): 10.1002/adma.202212084

Abstract

Nonfullerene-acceptor-based organic solar cells (NFA-OSCs) are now set off to the 20% power conversion efficiency milestone. To achieve this, minimizing all loss channels, including nonradiative photovoltage losses, seems a necessity. Nonradiative recombination, to a great extent, is known to be an...

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Published in: Advanced Materials
ISSN: 0935-9648 1521-4095
Published: Wiley 2023
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Nonradiative recombination, to a great extent, is known to be an inherent material property due to vibrationally induced decay of charge-transfer (CT) states or their back electron transfer to the triplet excitons. Herein, it is shown that the use of a new conjugated nitroxide radical polymer with 2,2,6,6-tetramethyl piperidine-1-oxyl side groups (GDTA) as an additive results in an improvement of the photovoltaic performance of NFA-OSCs based on different active layer materials. Upon the addition of GDTA, the open-circuit voltage (VOC), fill factor (FF), and short-circuit current density (JSC) improve simultaneously. This approach is applied to several material systems including state-of-the-art donor/acceptor pairs showing improvement from 15.8% to 17.6% (in the case of PM6:Y6) and from 17.5% to 18.3% (for PM6:BTP-eC9). Then, the possible reasons behind the observed improvements are discussed. The results point toward the suppression of the CT state to triplet excitons loss channel. 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spelling v2 63936 2023-07-25 A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2023-07-25 SPH Nonfullerene-acceptor-based organic solar cells (NFA-OSCs) are now set off to the 20% power conversion efficiency milestone. To achieve this, minimizing all loss channels, including nonradiative photovoltage losses, seems a necessity. Nonradiative recombination, to a great extent, is known to be an inherent material property due to vibrationally induced decay of charge-transfer (CT) states or their back electron transfer to the triplet excitons. Herein, it is shown that the use of a new conjugated nitroxide radical polymer with 2,2,6,6-tetramethyl piperidine-1-oxyl side groups (GDTA) as an additive results in an improvement of the photovoltaic performance of NFA-OSCs based on different active layer materials. Upon the addition of GDTA, the open-circuit voltage (VOC), fill factor (FF), and short-circuit current density (JSC) improve simultaneously. This approach is applied to several material systems including state-of-the-art donor/acceptor pairs showing improvement from 15.8% to 17.6% (in the case of PM6:Y6) and from 17.5% to 18.3% (for PM6:BTP-eC9). Then, the possible reasons behind the observed improvements are discussed. The results point toward the suppression of the CT state to triplet excitons loss channel. This work presents a facile, promising, and generic approach to further improve the performance of NFA-OSCs. Journal Article Advanced Materials 35 23 Wiley 0935-9648 1521-4095 Low-lying triplets, nitroxide radical conjugated polymers, nonradiative energy loss, organic solar cells, solid additives 1 6 2023 2023-06-01 10.1002/adma.202212084 http://dx.doi.org/10.1002/adma.202212084 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University Another institution paid the OA fee Industrial Guidance Project for Colleges and Universities of Gansu Province. Grant Number: 2020C-07 National Nature Science Foundation of China. Grant Numbers: 62164007, 51903112 National Research Foundation of Korea. Grant Numbers: 2019R1A2C2085290, 2019R1A6A1A11044070 K&A Wallenberg Foundation. Grant Numbers: 2017.0186, 2016.0059 the Swedish Energy Agency. Grant Number: P2021-90067 the Swedish Research Council. Grant Numbers: 2016-06146, 2019-04683 Open Project Program of Wuhan National Laboratory for Optoelectronics. Grant Number: 2019WNLOKF016 Sêr Cymru II Rising Star Fellow and acknowledges EPSRC Program Grant. Grant Number: EP/T028511/1 2023-09-06T15:53:47.7653394 2023-07-25T00:28:28.4723015 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Furong Shi 1 Pengzhi Guo 2 Xianfeng Qiao 3 Guo Yao 4 Tao Zhang 5 Qi Lu 6 Qian Wang 7 Xiaofeng Wang 8 Jasurbek Rikhsibaev 9 Ergang Wang 0000-0002-4942-3771 10 Chunfeng Zhang 11 Young‐Wan Kwon 12 Han Young Woo 13 Hongbin Wu 14 Jianhui Hou 15 Dongge Ma 16 Ardalan Armin 0000-0002-6129-5354 17 Yuguang Ma 18 Yangjun Xia 0000-0001-8496-4680 19 63936__28173__1c76425be9ae41fdb4da37d9e7210a7b.pdf 63936.pdf 2023-07-25T14:33:56.0064715 Output 2478458 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 (CC-BY-NC-ND) Licence. true eng https://creativecommons.org/licenses/by-nc-nd/4.0/
title A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
spellingShingle A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
Ardalan Armin
title_short A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
title_full A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
title_fullStr A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
title_full_unstemmed A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
title_sort A Nitroxide Radical Conjugated Polymer as an Additive to Reduce Nonradiative Energy Loss in Organic Solar Cells
author_id_str_mv 22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv 22b270622d739d81e131bec7a819e2fd_***_Ardalan Armin
author Ardalan Armin
author2 Furong Shi
Pengzhi Guo
Xianfeng Qiao
Guo Yao
Tao Zhang
Qi Lu
Qian Wang
Xiaofeng Wang
Jasurbek Rikhsibaev
Ergang Wang
Chunfeng Zhang
Young‐Wan Kwon
Han Young Woo
Hongbin Wu
Jianhui Hou
Dongge Ma
Ardalan Armin
Yuguang Ma
Yangjun Xia
format Journal article
container_title Advanced Materials
container_volume 35
container_issue 23
publishDate 2023
institution Swansea University
issn 0935-9648
1521-4095
doi_str_mv 10.1002/adma.202212084
publisher Wiley
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 Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://dx.doi.org/10.1002/adma.202212084
document_store_str 1
active_str 0
description Nonfullerene-acceptor-based organic solar cells (NFA-OSCs) are now set off to the 20% power conversion efficiency milestone. To achieve this, minimizing all loss channels, including nonradiative photovoltage losses, seems a necessity. Nonradiative recombination, to a great extent, is known to be an inherent material property due to vibrationally induced decay of charge-transfer (CT) states or their back electron transfer to the triplet excitons. Herein, it is shown that the use of a new conjugated nitroxide radical polymer with 2,2,6,6-tetramethyl piperidine-1-oxyl side groups (GDTA) as an additive results in an improvement of the photovoltaic performance of NFA-OSCs based on different active layer materials. Upon the addition of GDTA, the open-circuit voltage (VOC), fill factor (FF), and short-circuit current density (JSC) improve simultaneously. This approach is applied to several material systems including state-of-the-art donor/acceptor pairs showing improvement from 15.8% to 17.6% (in the case of PM6:Y6) and from 17.5% to 18.3% (for PM6:BTP-eC9). Then, the possible reasons behind the observed improvements are discussed. The results point toward the suppression of the CT state to triplet excitons loss channel. This work presents a facile, promising, and generic approach to further improve the performance of NFA-OSCs.
published_date 2023-06-01T15:53:49Z
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score 11.016235

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