Full metadata record
DC Field | Value | Language |
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dc.citation.endPage | 143 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 119 | - |
dc.citation.title | JOURNAL OF FLEXIBLE AND PRINTED ELECTRONICS | - |
dc.citation.volume | 2 | - |
dc.contributor.author | Kim, Kwangmin | - |
dc.contributor.author | Kim, BongSoo | - |
dc.date.accessioned | 2023-12-28T17:05:10Z | - |
dc.date.available | 2023-12-28T17:05:10Z | - |
dc.date.created | 2023-12-28 | - |
dc.date.issued | 2023-06 | - |
dc.description.abstract | To overcome the intrinsic limitations of fullerene-based organic photovoltaic (OPV) devices, research on OPV devices based on non-fullerene acceptors (NFAs) has been actively conducted in recent years. It is important to understand the relationship between the structure of the NFAs and photovoltaic properties to create high-performance OPV devices. In this study, we have designed and synthesized a series of NFAs (DFDO-RC2 and DFDE-RC2) based on electron-rich dithienosilole (D) and electron-deficient difluorobenzodiathiazole (F), benzodiathiazole-connected 3-ethylrhodanine (RC2) units, and alkyl chains of 2-ethylhexyl (E) and octyl (O) groups. The PTB7-Th:DFD-RC2 devices showed low PCEs mainly due to the highly located highest occupied molecular orbital (HOMO) energy levels of the DFD-RC2 acceptors compared to the PTB7-Th polymer donor. To lower the HOMO levels of the DFD-RC2 NFAs, the backbone structures were modified by replacing difluorobenzodiathiazole core moiety with difluorobenzene (FBz) to obtain DFBz-RC2 molecules (DFBzO-RC2 and DFBzE-RC2). PTB7-Th:DFBz-RC2 devices exhibited significantly improved PCEs compared to PTB7-Th:DFD-RC2 devices. The DFBzO-RC2 and DFBzE-RC2 molecule-based OPVs exhibited remarkably high Vocs of 1.03 and 1.07 V, respectively, which characteristic is associated with the very low energy loss (Eloss) of 0.51 eV in both PTB7-Th:DFBzO-RC2 and PTB7-Th:DFBzE-RC2 devices. Overall, our investigation of the various synthesized molecules reveals the structure-to-photovoltaic properties, which guide the design of new high-performance NFAs to advance in the field of organic solar cells. | - |
dc.identifier.bibliographicCitation | JOURNAL OF FLEXIBLE AND PRINTED ELECTRONICS, v.2, no.1, pp.119 - 143 | - |
dc.identifier.doi | 10.56767/jfpe.2023.2.1.119 | - |
dc.identifier.issn | 2951-2174 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/67185 | - |
dc.language | 영어 | - |
dc.publisher | Korea Flexible & Printed Electronics Society | - |
dc.title | Rhodanine-Based Non-Fullerene Acceptors for Organic Solar Cells with a High Open-Circuit Voltage of 1.07 V | - |
dc.type | Article | - |
dc.description.isOpenAccess | TRUE | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | domestic | - |
dc.subject.keywordAuthor | Organic solar cells | - |
dc.subject.keywordAuthor | Non-fullerene acceptors | - |
dc.subject.keywordAuthor | Power conversion efficiency | - |
dc.subject.keywordAuthor | Alkyl chain engineering | - |
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