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Article: Asymmetric Alkoxy and Alkyl Substitution on Nonfullerene Acceptors Enabling High‐Performance Organic Solar Cells

TitleAsymmetric Alkoxy and Alkyl Substitution on Nonfullerene Acceptors Enabling High‐Performance Organic Solar Cells
Authors
Keywordsasymmetric alkoxy substitution
morphology
organic solar cells
solubility
Y-series acceptors
Issue Date2021
PublisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1614-6840
Citation
Advanced Energy Materials, 2021, v. 11 n. 3, p. article no. 2003141 How to Cite?
AbstractIn this paper, a strategy of asymmetric alkyl and alkoxy substitution is applied to state-of-the-art Y-series nonfullerene acceptors (NFAs), and it achieves great performance in organic solar cell (OSC) devices. Since alkoxy groups can have a significant influence on the material properties of NFAs, alkoxy substitution is applied to the Y6 molecule in a symmetric manner. The resulting molecule (named Y6-2O), despite showing improved open-circuit voltage (Voc), yields extremely poor performance due to low solubility and excessive aggregation properties, a change that is due to the conformational locking effect of alkoxy groups. In contrast, asymmetric alkyl and alkoxy substitution on Y6, yields a molecule named Y6-1O that can maintain the positive effect of Voc improvement and obtain reasonably good solubility. The resulting molecule Y6-1O enables highly efficient nonfullerene OSCs with 17.6% efficiency and the asymmetric side-chain strategy has the potential to be applied to other NFA-material systems to further improve their performance.
Persistent Identifierhttp://hdl.handle.net/10722/301946
ISSN
2020 Impact Factor: 29.368
2020 SCImago Journal Rankings: 10.080

 

DC FieldValueLanguage
dc.contributor.authorChen, Y-
dc.contributor.authorBai, F-
dc.contributor.authorPeng, Z-
dc.contributor.authorZhu, L-
dc.contributor.authorZhang, J-
dc.contributor.authorZou, X-
dc.contributor.authorQin, Y-
dc.contributor.authorKim, HK-
dc.contributor.authorYuan, J-
dc.contributor.authorMa, LK-
dc.contributor.authorZhang, J-
dc.contributor.authorYu, H-
dc.contributor.authorChow, PCY-
dc.contributor.authorHuang, F-
dc.contributor.authorZou, Y-
dc.contributor.authorAde, H-
dc.contributor.authorLiu, F-
dc.contributor.authorYan, H-
dc.date.accessioned2021-08-21T03:29:18Z-
dc.date.available2021-08-21T03:29:18Z-
dc.date.issued2021-
dc.identifier.citationAdvanced Energy Materials, 2021, v. 11 n. 3, p. article no. 2003141-
dc.identifier.issn1614-6832-
dc.identifier.urihttp://hdl.handle.net/10722/301946-
dc.description.abstractIn this paper, a strategy of asymmetric alkyl and alkoxy substitution is applied to state-of-the-art Y-series nonfullerene acceptors (NFAs), and it achieves great performance in organic solar cell (OSC) devices. Since alkoxy groups can have a significant influence on the material properties of NFAs, alkoxy substitution is applied to the Y6 molecule in a symmetric manner. The resulting molecule (named Y6-2O), despite showing improved open-circuit voltage (Voc), yields extremely poor performance due to low solubility and excessive aggregation properties, a change that is due to the conformational locking effect of alkoxy groups. In contrast, asymmetric alkyl and alkoxy substitution on Y6, yields a molecule named Y6-1O that can maintain the positive effect of Voc improvement and obtain reasonably good solubility. The resulting molecule Y6-1O enables highly efficient nonfullerene OSCs with 17.6% efficiency and the asymmetric side-chain strategy has the potential to be applied to other NFA-material systems to further improve their performance.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1614-6840-
dc.relation.ispartofAdvanced Energy Materials-
dc.rightsSubmitted (preprint) Version This is the pre-peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Accepted (peer-reviewed) Version This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectasymmetric alkoxy substitution-
dc.subjectmorphology-
dc.subjectorganic solar cells-
dc.subjectsolubility-
dc.subjectY-series acceptors-
dc.titleAsymmetric Alkoxy and Alkyl Substitution on Nonfullerene Acceptors Enabling High‐Performance Organic Solar Cells-
dc.typeArticle-
dc.identifier.emailChow, PCY: pcyc@hku.hk-
dc.identifier.authorityChow, PCY=rp02699-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/aenm.202003141-
dc.identifier.scopuseid_2-s2.0-85096882589-
dc.identifier.hkuros324166-
dc.identifier.volume11-
dc.identifier.issue3-
dc.identifier.spagearticle no. 2003141-
dc.identifier.epagearticle no. 2003141-
dc.publisher.placeGermany-

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