Improved photovoltaic performance of a nonfullerene acceptor based on a benzo[b]thiophene fused end group with extended pi-conjugation
DC Field | Value | Language |
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dc.contributor.author | Yang, Kun | - |
dc.contributor.author | Liao, Qiaogan | - |
dc.contributor.author | Koh, Chang Woo | - |
dc.contributor.author | Chen, Jianhua | - |
dc.contributor.author | Su, Mengyao | - |
dc.contributor.author | Zhou, Xin | - |
dc.contributor.author | Tang, Yumin | - |
dc.contributor.author | Wang, Yang | - |
dc.contributor.author | Zhang, Youming | - |
dc.contributor.author | Woo, Han Young | - |
dc.contributor.author | Guo, Xugang | - |
dc.date.accessioned | 2021-09-01T15:58:49Z | - |
dc.date.available | 2021-09-01T15:58:49Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2019-04-28 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/65962 | - |
dc.description.abstract | A new indacenodithiophene-based acceptor-donor-acceptor (A-D-A) type nonfullerene acceptor material ITBTC, featuring a conjugation-extended benzo[b]thiophene-fused end group, was designed and synthesized. Compared to the well known phenyl-fused ITIC acceptor containing a 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC) end group, incorporation of an additional electron-rich thiophene into the IC moiety decreased the electron-accepting strength of the end group and increased the intermolecular interactions of ITBTC molecules. As a result, ITBTC exhibited an elevated lowest unoccupied molecular orbital, an improved electron mobility, and a more favorable blend film morphology. Despite its slightly blue-shifted absorption, the photocurrent of ITBTC-based devices was well-maintained due to the extra absorption band in the short wavelength range, which is induced by its conjugation-extended end group. Benefitting from these characteristics, the ITBTC-based solar cells achieved an enhanced power conversion efficiency (PCE) of 10.99% with a simultaneously improved open-circuit voltage (V-oc, 0.94 V) and fill factor (FF, 71.3%) and well-maintained short-circuit current density (J(sc), 16.37 mA cm(-2)), compared to those of the ITIC-based devices (PCE of 9.53%). These results suggest that extending the -conjugation of end group through thiophene incorporation is an efficient approach for optimizing both the energy level alignment and intermolecular interaction of the acceptor materials while maintaining their efficient light-harvesting ability. Our study also demonstrates the great potential of the new benzo[b]thiophene-fused end group for constructing high-performance nonfullerene acceptors and provided insight into overcoming the trade-off between J(sc) and V-oc to realize simultaneously enhanced photovoltaic parameters. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | ORGANIC SOLAR-CELLS | - |
dc.subject | SMALL-MOLECULE ACCEPTORS | - |
dc.subject | NON-FULLERENE ACCEPTOR | - |
dc.subject | ELECTRON-ACCEPTOR | - |
dc.subject | SIDE-CHAINS | - |
dc.subject | EFFICIENCY | - |
dc.subject | ACHIEVE | - |
dc.subject | DESIGN | - |
dc.subject | J(SC) | - |
dc.subject | UNIT | - |
dc.title | Improved photovoltaic performance of a nonfullerene acceptor based on a benzo[b]thiophene fused end group with extended pi-conjugation | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Woo, Han Young | - |
dc.identifier.doi | 10.1039/c9ta01111k | - |
dc.identifier.scopusid | 2-s2.0-85064431219 | - |
dc.identifier.wosid | 000467249200041 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.16, pp.9822 - 9830 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY A | - |
dc.citation.volume | 7 | - |
dc.citation.number | 16 | - |
dc.citation.startPage | 9822 | - |
dc.citation.endPage | 9830 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | ORGANIC SOLAR-CELLS | - |
dc.subject.keywordPlus | SMALL-MOLECULE ACCEPTORS | - |
dc.subject.keywordPlus | NON-FULLERENE ACCEPTOR | - |
dc.subject.keywordPlus | ELECTRON-ACCEPTOR | - |
dc.subject.keywordPlus | SIDE-CHAINS | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordPlus | ACHIEVE | - |
dc.subject.keywordPlus | DESIGN | - |
dc.subject.keywordPlus | J(SC) | - |
dc.subject.keywordPlus | UNIT | - |
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