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End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells

Andrew Wadsworth, Helen Bristow, Zeinab Hamid, Maxime Babics, Nicola Gasparini, Colm W. Boyle, Weimin Zhang, Yifan Dong, Karl. J. Thorley, Marios Neophytou, Raja Shahid Ashraf, James Durrant Orcid Logo, Derya Baran, Iain McCulloch

Advanced Functional Materials, Start page: 1808429

Swansea University Author: James Durrant Orcid Logo

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DOI (Published version): 10.1002/adfm.201808429

Abstract

High fill factors have only recently become commonplace in nonfullerene‐based organic solar cells, with the balance of charge carrier mobilities often cited as the contributing factor. Here an end‐group modification to a commonly used nonfullerene acceptor (O‐IDTBR) is reported, in which the rhodani...

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Published in: Advanced Functional Materials
ISSN: 1616-301X 1616-3028
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa50978
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spelling 2019-07-01T10:53:57.0978928 v2 50978 2019-07-01 End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2019-07-01 MTLS High fill factors have only recently become commonplace in nonfullerene‐based organic solar cells, with the balance of charge carrier mobilities often cited as the contributing factor. Here an end‐group modification to a commonly used nonfullerene acceptor (O‐IDTBR) is reported, in which the rhodanine end groups are replaced with dicyano moieties, resulting in the acceptor O‐IDTBCN. This new acceptor affords significant improvement in the fill factor (73%) and photocurrent (19.8 mA cm−2) in organic solar cells with the low bandgap polymer PTB7‐Th. A narrowing of the bandgap, as a result of greater push–pull hybridization, allows complementary absorption to the donor and thus improved photon harvesting. Additionally, the measurement of charge carrier mobilities and lifetimes in both systems reveal that the PTB7‐Th:O‐IDTBCN blend possesses more balanced charge carrier mobilities, and longer lifetimes. Morphology studies reveal a slightly greater degree of molecular mixing of the O‐IDTBCN when blended with PTB7‐Th, despite the greater and more balanced charge carrier mobilities in this blend. Journal Article Advanced Functional Materials 1808429 1616-301X 1616-3028 31 12 2019 2019-12-31 10.1002/adfm.201808429 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2019-07-01T10:53:57.0978928 2019-07-01T10:47:30.0123971 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Andrew Wadsworth 1 Helen Bristow 2 Zeinab Hamid 3 Maxime Babics 4 Nicola Gasparini 5 Colm W. Boyle 6 Weimin Zhang 7 Yifan Dong 8 Karl. J. Thorley 9 Marios Neophytou 10 Raja Shahid Ashraf 11 James Durrant 0000-0001-8353-7345 12 Derya Baran 13 Iain McCulloch 14
title End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
spellingShingle End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
James Durrant
title_short End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
title_full End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
title_fullStr End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
title_full_unstemmed End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
title_sort End Group Tuning in Acceptor–Donor–Acceptor Nonfullerene Small Molecules for High Fill Factor Organic Solar Cells
author_id_str_mv f3dd64bc260e5c07adfa916c27dbd58a
author_id_fullname_str_mv f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
author James Durrant
author2 Andrew Wadsworth
Helen Bristow
Zeinab Hamid
Maxime Babics
Nicola Gasparini
Colm W. Boyle
Weimin Zhang
Yifan Dong
Karl. J. Thorley
Marios Neophytou
Raja Shahid Ashraf
James Durrant
Derya Baran
Iain McCulloch
format Journal article
container_title Advanced Functional Materials
container_start_page 1808429
publishDate 2019
institution Swansea University
issn 1616-301X
1616-3028
doi_str_mv 10.1002/adfm.201808429
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 0
active_str 0
description High fill factors have only recently become commonplace in nonfullerene‐based organic solar cells, with the balance of charge carrier mobilities often cited as the contributing factor. Here an end‐group modification to a commonly used nonfullerene acceptor (O‐IDTBR) is reported, in which the rhodanine end groups are replaced with dicyano moieties, resulting in the acceptor O‐IDTBCN. This new acceptor affords significant improvement in the fill factor (73%) and photocurrent (19.8 mA cm−2) in organic solar cells with the low bandgap polymer PTB7‐Th. A narrowing of the bandgap, as a result of greater push–pull hybridization, allows complementary absorption to the donor and thus improved photon harvesting. Additionally, the measurement of charge carrier mobilities and lifetimes in both systems reveal that the PTB7‐Th:O‐IDTBCN blend possesses more balanced charge carrier mobilities, and longer lifetimes. Morphology studies reveal a slightly greater degree of molecular mixing of the O‐IDTBCN when blended with PTB7‐Th, despite the greater and more balanced charge carrier mobilities in this blend.
published_date 2019-12-31T04:02:42Z
_version_ 1763753236678836224
score 11.013731

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