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On the Conformation of Dimeric Acceptors and Their Polymer Solar Cells with Efficiency over 18 %
Chalmers University of Technology, Sweden; Aalborg University, Denmark.
King Abdullah University of Science & Technology, Saudi Arabia.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013).ORCID iD: 0000-0002-8692-3396
Korea University, South Korea.
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2023 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed) Published
Abstract [en]

The determination of molecular conformations of oligomeric acceptors (OAs) and their impact on molecular packing are crucial for understanding the photovoltaic performance of their resulting polymer solar cells (PSCs) but have not been well studied yet. Herein, we synthesized two dimeric acceptor materials, DIBP3F-Se and DIBP3F-S, which bridged two segments of Y6-derivatives by selenophene and thiophene, respectively. Theoretical simulation and experimental 1D and 2D NMR spectroscopic studies prove that both dimers exhibit O-shaped conformations other than S- or U-shaped counter-ones. Notably, this O-shaped conformation is likely governed by a distinctive "conformational lock" mechanism, arising from the intensified intramolecular & pi;-& pi; interactions among their two terminal groups within the dimers. PSCs based on DIBP3F-Se deliver a maximum efficiency of 18.09 %, outperforming DIBP3F-S-based cells (16.11 %) and ranking among the highest efficiencies for OA-based PSCs. This work demonstrates a facile method to obtain OA conformations and highlights the potential of dimeric acceptors for high-performance PSCs.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023.
Keywords [en]
Acceptor, Molecular Conformation, Oligomer, Selenophene, Solar Cells
National Category
Organic Chemistry Biophysics
Research subject
Physics
Identifiers
URN: urn:nbn:se:kau:diva-96239DOI: 10.1002/anie.202302888ISI: 001030527700001PubMedID: 37380618Scopus ID: 2-s2.0-85165198230OAI: oai:DiVA.org:kau-96239DiVA, id: diva2:1786290
Funder
Swedish Research Council, 2016-06146; 2019-04683; 2020-05233Swedish Research Council Formas, 2017.0186Knut and Alice Wallenberg Foundation, 2016.0059Swedish Energy Agency, P2021-90067Available from: 2023-08-08 Created: 2023-08-08 Last updated: 2023-08-09Bibliographically approved

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Franco, Leandro R.Araujo, MoysesMarchiori, Cleber

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Franco, Leandro R.Chen, SiChen, CailingAraujo, MoysesMarchiori, CleberIsikgor, Furkan H. H.Han, YuLaquai, FredericAnthopoulos, Thomas D. D.
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Department of Engineering and Physics (from 2013)
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CiteExportLink to record
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