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Article: Enhance the performance of polymer solar cells via extension of the flanking end groups of fused ring acceptors

TitleEnhance the performance of polymer solar cells via extension of the flanking end groups of fused ring acceptors
Authors
Keywordsnon-fullerene
high charge mobility
extended end groups
polymer solar cells
Issue Date2018
Citation
Science China Chemistry, 2018, v. 61, n. 10, p. 1320-1327 How to Cite?
Abstract© 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. Two new fused ring electron acceptors (FREAs) IDT-IC-T and IDT-IC-B with thienyl or phenyl substituents at the terminal INCN unit are synthesized. Theoretical calculations indicate that the two acceptors dominantly favor an intermolecular π-π stacking between the flanking terminal groups. The twist angle between the aryl substituent and INCN unit has a significant influence on the π-π stacking distance of terminal unit. IDT-IC-T with a smaller twist angle has a shorter π-π stacking distance than that of IDT-IC-B with a larger twist angle. In addition, extending the conjugation also affects the blend film morphology. IDT-IC-T and IDT-IC-B based photoactive films show appropriate nanoscale phase separations; whereas, blend films based on the parent compound IDT-IC show large-size acceptor domains. As expected, PBDB-T:IDT-IC-T blend films show higher and more balanced electron and hole mobilities. Moreover, these two acceptors present a good charge-transport connectivity arising from the extended conjugation and the increased intermolecular overlapping. Ultimately, IDT-IC-T demonstrates the highest electron mobility (1.47×10−4 cm2 V−1 s−1) and the best power conversion efficiency (PCE) of 9.43%. As for IDT-IC, which only shows an electron mobility of 7.33×10−5 cm2 V−1 s−1 and a PCE of 5.82%. These findings provide a facile and effective way to improve the photovoltaic performance.
Persistent Identifierhttp://hdl.handle.net/10722/288578
ISSN
2019 Impact Factor: 6.356
2015 SCImago Journal Rankings: 0.567

 

DC FieldValueLanguage
dc.contributor.authorFeng, Shiyu-
dc.contributor.authorMa, Danyang-
dc.contributor.authorWu, Liangliang-
dc.contributor.authorLiu, Yahui-
dc.contributor.authorZhang, Cai’e-
dc.contributor.authorXu, Xinjun-
dc.contributor.authorChen, Xuebo-
dc.contributor.authorYan, Shouke-
dc.contributor.authorBo, Zhishan-
dc.date.accessioned2020-10-12T08:05:19Z-
dc.date.available2020-10-12T08:05:19Z-
dc.date.issued2018-
dc.identifier.citationScience China Chemistry, 2018, v. 61, n. 10, p. 1320-1327-
dc.identifier.issn1674-7291-
dc.identifier.urihttp://hdl.handle.net/10722/288578-
dc.description.abstract© 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature. Two new fused ring electron acceptors (FREAs) IDT-IC-T and IDT-IC-B with thienyl or phenyl substituents at the terminal INCN unit are synthesized. Theoretical calculations indicate that the two acceptors dominantly favor an intermolecular π-π stacking between the flanking terminal groups. The twist angle between the aryl substituent and INCN unit has a significant influence on the π-π stacking distance of terminal unit. IDT-IC-T with a smaller twist angle has a shorter π-π stacking distance than that of IDT-IC-B with a larger twist angle. In addition, extending the conjugation also affects the blend film morphology. IDT-IC-T and IDT-IC-B based photoactive films show appropriate nanoscale phase separations; whereas, blend films based on the parent compound IDT-IC show large-size acceptor domains. As expected, PBDB-T:IDT-IC-T blend films show higher and more balanced electron and hole mobilities. Moreover, these two acceptors present a good charge-transport connectivity arising from the extended conjugation and the increased intermolecular overlapping. Ultimately, IDT-IC-T demonstrates the highest electron mobility (1.47×10−4 cm2 V−1 s−1) and the best power conversion efficiency (PCE) of 9.43%. As for IDT-IC, which only shows an electron mobility of 7.33×10−5 cm2 V−1 s−1 and a PCE of 5.82%. These findings provide a facile and effective way to improve the photovoltaic performance.-
dc.languageeng-
dc.relation.ispartofScience China Chemistry-
dc.subjectnon-fullerene-
dc.subjecthigh charge mobility-
dc.subjectextended end groups-
dc.subjectpolymer solar cells-
dc.titleEnhance the performance of polymer solar cells via extension of the flanking end groups of fused ring acceptors-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11426-018-9252-9-
dc.identifier.scopuseid_2-s2.0-85049565303-
dc.identifier.volume61-
dc.identifier.issue10-
dc.identifier.spage1320-
dc.identifier.epage1327-
dc.identifier.eissn1869-1870-

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