了解高效非富勒烯受体的光物理(会议报告)

Nathaniel P. Gallop, Xijia Zheng, Flurin D. Eisner, Mohammed Azzouzi, Zhuping Fei, M. Heeney, J. Nelson, A. Bakulin
{"title":"了解高效非富勒烯受体的光物理(会议报告)","authors":"Nathaniel P. Gallop, Xijia Zheng, Flurin D. Eisner, Mohammed Azzouzi, Zhuping Fei, M. Heeney, J. Nelson, A. Bakulin","doi":"10.1117/12.2321235","DOIUrl":null,"url":null,"abstract":"One of the key areas of study in organic photovoltaics is the development of so-called 'non-fullerene acceptors' (NFAs), which enjoy several benefits over older, fullerene-based acceptors, such as low cost, high absorptivity, and tuneability. A recent report Fei et. al. demonstrated conversion efficiencies of 13% in donor-acceptor blends comprising a fluorinated derivative of the common donor PBDB-T and an alkylated derivative of the ITIC (C8-ITIC) acceptor species. Understanding the underlying dynamics of this material is therefore important for the rational design of new NFAs.\n\nIn order to understand the photophysical processes in C8-ITIC, we performed ultrafast transient absorption studies of four donor-acceptor blends, containing various combinations of C8-ITIC, PFBDB-T, and their unmodified predecessors. Long-lived excitons form at the acceptor regardless of the excitation frequency, suggestive of rapid energy transfer from the donor to the acceptor. Exciton decay at early times was more rapid in C8-ITIC compared to non-alkylated ITIC. A distinct change in exciton decay characteristics was observed at longer timescales in tandem with spectral drift in the acceptor’s excitonic peak. We use global analysis and a broader array of ultrafast spectroscopic techniques to elucidate the identity and mechanism behind this feature. Our results will help to shed light on the efficiency of this material and aid the development of more efficient and effective non-fullerene acceptors.","PeriodicalId":445991,"journal":{"name":"Physical Chemistry of Semiconductor Materials and Interfaces XVII","volume":"21 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Understanding the photophysics of efficient non-fullerene acceptors (Conference Presentation)\",\"authors\":\"Nathaniel P. Gallop, Xijia Zheng, Flurin D. Eisner, Mohammed Azzouzi, Zhuping Fei, M. Heeney, J. Nelson, A. Bakulin\",\"doi\":\"10.1117/12.2321235\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"One of the key areas of study in organic photovoltaics is the development of so-called 'non-fullerene acceptors' (NFAs), which enjoy several benefits over older, fullerene-based acceptors, such as low cost, high absorptivity, and tuneability. A recent report Fei et. al. demonstrated conversion efficiencies of 13% in donor-acceptor blends comprising a fluorinated derivative of the common donor PBDB-T and an alkylated derivative of the ITIC (C8-ITIC) acceptor species. Understanding the underlying dynamics of this material is therefore important for the rational design of new NFAs.\\n\\nIn order to understand the photophysical processes in C8-ITIC, we performed ultrafast transient absorption studies of four donor-acceptor blends, containing various combinations of C8-ITIC, PFBDB-T, and their unmodified predecessors. Long-lived excitons form at the acceptor regardless of the excitation frequency, suggestive of rapid energy transfer from the donor to the acceptor. Exciton decay at early times was more rapid in C8-ITIC compared to non-alkylated ITIC. A distinct change in exciton decay characteristics was observed at longer timescales in tandem with spectral drift in the acceptor’s excitonic peak. We use global analysis and a broader array of ultrafast spectroscopic techniques to elucidate the identity and mechanism behind this feature. Our results will help to shed light on the efficiency of this material and aid the development of more efficient and effective non-fullerene acceptors.\",\"PeriodicalId\":445991,\"journal\":{\"name\":\"Physical Chemistry of Semiconductor Materials and Interfaces XVII\",\"volume\":\"21 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-09-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physical Chemistry of Semiconductor Materials and Interfaces XVII\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1117/12.2321235\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Chemistry of Semiconductor Materials and Interfaces XVII","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1117/12.2321235","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

有机光伏研究的关键领域之一是所谓的“非富勒烯受体”(nfa)的发展,它比旧的富勒烯受体具有几个优点,如低成本、高吸收率和可调性。Fei等人最近的一份报告表明,在由普通供体PBDB-T的氟化衍生物和ITIC (C8-ITIC)受体物种的烷基化衍生物组成的供体-受体混合物中,转化效率为13%。因此,了解这种材料的潜在动力学对于合理设计新的nfa非常重要。为了了解C8-ITIC的光物理过程,我们进行了四种供体-受体共混物的超快瞬态吸收研究,这些共混物含有C8-ITIC, PFBDB-T及其未修饰的前身的不同组合。无论激发频率如何,长寿命激子都在受体处形成,这表明能量从供体迅速转移到受体。与未烷基化的ITIC相比,C8-ITIC的早期激子衰变更快。在较长的时间尺度上,随着受体激子峰的光谱漂移,激子衰减特性发生了明显的变化。我们使用全局分析和更广泛的超快光谱技术阵列来阐明这一特征背后的身份和机制。我们的结果将有助于揭示这种材料的效率,并有助于开发更高效和有效的非富勒烯受体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Understanding the photophysics of efficient non-fullerene acceptors (Conference Presentation)
One of the key areas of study in organic photovoltaics is the development of so-called 'non-fullerene acceptors' (NFAs), which enjoy several benefits over older, fullerene-based acceptors, such as low cost, high absorptivity, and tuneability. A recent report Fei et. al. demonstrated conversion efficiencies of 13% in donor-acceptor blends comprising a fluorinated derivative of the common donor PBDB-T and an alkylated derivative of the ITIC (C8-ITIC) acceptor species. Understanding the underlying dynamics of this material is therefore important for the rational design of new NFAs. In order to understand the photophysical processes in C8-ITIC, we performed ultrafast transient absorption studies of four donor-acceptor blends, containing various combinations of C8-ITIC, PFBDB-T, and their unmodified predecessors. Long-lived excitons form at the acceptor regardless of the excitation frequency, suggestive of rapid energy transfer from the donor to the acceptor. Exciton decay at early times was more rapid in C8-ITIC compared to non-alkylated ITIC. A distinct change in exciton decay characteristics was observed at longer timescales in tandem with spectral drift in the acceptor’s excitonic peak. We use global analysis and a broader array of ultrafast spectroscopic techniques to elucidate the identity and mechanism behind this feature. Our results will help to shed light on the efficiency of this material and aid the development of more efficient and effective non-fullerene acceptors.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Front Matter: Volume 10724 Carrier dynamics in optically excited Fermi degenerate states in atomically thin TMDC semiconductors (Conference Presentation) Charge losses in bulk-heterojunction organic solar cells on nanosecond timescale and the role of charge transfer states (Conference Presentation) Recombination and charge transfer states in organic photovoltaics: from small molecules to ultra-low band gap polymers (Conference Presentation) Ion migration in methylammonium lead halide perovskites (Conference Presentation)
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1