Quinoxaline-Based Wide Band Gap Polymers for Efficient Nonfullerene Organic Solar Cells with Large Open-Circuit Voltages
DC Field | Value | Language |
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dc.contributor.author | Yang, Jie | - |
dc.contributor.author | Uddin, Mohammad Afsar | - |
dc.contributor.author | Tang, Yumin | - |
dc.contributor.author | Wang, Yulun | - |
dc.contributor.author | Wang, Yang | - |
dc.contributor.author | Su, Huimin | - |
dc.contributor.author | Gao, Rutian | - |
dc.contributor.author | Chen, Zhi-Kuan | - |
dc.contributor.author | Dai, Junfeng | - |
dc.contributor.author | Woo, Han Young | - |
dc.contributor.author | Guo, Xugang | - |
dc.date.accessioned | 2021-09-02T09:00:22Z | - |
dc.date.available | 2021-09-02T09:00:22Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2018-07-11 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/74354 | - |
dc.description.abstract | We present here a series of wide-band-gap (E-g: >1.8 eV) polymer donors by incorporating thiophene-flanked phenylene as an electron-donating unit and quinoxaline as an electron-accepting co-unit to attain large open-circuit voltages (V(oc)s) and short-circuit currents (J(sc)s) in nonfullerene organic solar cells (OSCs). Fluorination was utilized to fine-tailor the energetics of polymer frontier molecular orbitals (FMOs) by replacing a variable number of H atoms on the phenylene moiety with F. It was found that fluorination can effectively modulate the polymer backbone planarity through intramolecular noncovalent S...F and/or H...F interactions. Polymers (P2-P4) show an improved molecular packing with a favorable face-on orientation compared to their nonfluorinated analogue (P1), which is critical to charge carrier transport and collection. When mixed with IDIC, a nonfullerene acceptor, P3 with two F atoms, achieves a remarkable V-oc of 1.00 V and a large J(sc) of 15.99 mA/cm(2), simultaneously, yielding a power-conversion efficiency (PCE) of 9.7%. Notably, the 1.00 V V-oc is among the largest values in the IDIC-based OSCs, leading to a small energy loss (E-loss: 0.62 eV) while maintaining a large PCE. The P3:IDIC blend shows an efficient exciton dissociation through hole transfer even under a small energy offset of 0.16 eV. Further fluorination leads to the polymer P4 with increased chain-twisting and mismatched FMO levels with IDIC, showing the lowest PCE of 2.93%. The results demonstrate that quinoxaline-based copolymers are promising donors for efficient OSCs and the fluorination needs to be fine-adjusted to optimize the interchain packing and physicochemical properties of polymers. Additionally, the structure property correlations from this work provide useful insights for developing wide-band-gap polymers with low-lying highest occupied molecular orbitals to minimize E-loss, and maximize V-oc in nonfullerene OSCs for efficient power conversion. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | RING ELECTRON-ACCEPTOR | - |
dc.subject | TO-HEAD LINKAGE | - |
dc.subject | CONJUGATED POLYMERS | - |
dc.subject | MOLECULAR DESIGN | - |
dc.subject | PHOTOVOLTAIC PERFORMANCE | - |
dc.subject | DONOR | - |
dc.subject | FLUORINATION | - |
dc.subject | RECOMBINATION | - |
dc.subject | BITHIOPHENE | - |
dc.subject | MORPHOLOGY | - |
dc.title | Quinoxaline-Based Wide Band Gap Polymers for Efficient Nonfullerene Organic Solar Cells with Large Open-Circuit Voltages | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Woo, Han Young | - |
dc.identifier.doi | 10.1021/acsami.8b04432 | - |
dc.identifier.scopusid | 2-s2.0-85048810124 | - |
dc.identifier.wosid | 000439007700039 | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.10, no.27, pp.23235 - 23246 | - |
dc.relation.isPartOf | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 10 | - |
dc.citation.number | 27 | - |
dc.citation.startPage | 23235 | - |
dc.citation.endPage | 23246 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | RING ELECTRON-ACCEPTOR | - |
dc.subject.keywordPlus | TO-HEAD LINKAGE | - |
dc.subject.keywordPlus | CONJUGATED POLYMERS | - |
dc.subject.keywordPlus | MOLECULAR DESIGN | - |
dc.subject.keywordPlus | PHOTOVOLTAIC PERFORMANCE | - |
dc.subject.keywordPlus | DONOR | - |
dc.subject.keywordPlus | FLUORINATION | - |
dc.subject.keywordPlus | RECOMBINATION | - |
dc.subject.keywordPlus | BITHIOPHENE | - |
dc.subject.keywordPlus | MORPHOLOGY | - |
dc.subject.keywordAuthor | polymer semiconductors | - |
dc.subject.keywordAuthor | fluorination | - |
dc.subject.keywordAuthor | nonfullerene organic solar cells | - |
dc.subject.keywordAuthor | energy losses | - |
dc.subject.keywordAuthor | open-circuit voltages | - |
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