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Unveiling the Influence of Linkers on Conformations of Oligomeric Acceptors for High-Performance Polymer Solar Cells.
Wu, Jingnan; Sun, Fengbo; Wang, Xunchang; Chen, Qiaonan; Franco, Leandro R; Zheng, Xufan; Araujo, C Moyses; Yang, Renqiang; Yu, Donghong; Wang, Ergang.
Afiliación
  • Wu J; Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.
  • Sun F; Department of Chemistry and Bioscience, Aalborg University, Aalborg, DK-9220, Denmark.
  • Wang X; Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056, China.
  • Chen Q; Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056, China.
  • Franco LR; Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Göteborg, SE-412 96, Sweden.
  • Zheng X; Department of Engineering and Physics, Karlstad University, Karlstad, 65188, Sweden.
  • Araujo CM; Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056, China.
  • Yang R; Department of Engineering and Physics, Karlstad University, Karlstad, 65188, Sweden.
  • Yu D; Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Uppsala, 75120, Sweden.
  • Wang E; Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056, China.
Adv Sci (Weinh) ; 11(40): e2406772, 2024 Oct.
Article en En | MEDLINE | ID: mdl-39206722
ABSTRACT
Conformational isomerism of organic photovoltaic materials has a profound impact on their molecular packing and therefore performance of polymer solar cells (PSCs). However, the conformations of oligomeric acceptors (OAs) are mostly predicted by simulations rather than experimental determinations. Herein, the stereochemical S-shaped structure of two dimeric-type acceptor molecules, V-DYIC and V-DYIC-4F, is first confirmed with different end groups (IC for V-DYIC and IC-2F for V-DYIC-4F), incorporating vinylene linkage for connecting the distinct state-of-the-art small molecule acceptor Y-segments. Through the synthetic control of fluorination sites adjacent to the vinyl-linker, S-shaped the conformation by NMR experiments is validated. Compared to the O-shaped dimer, S-shaped conformation results in enhanced lamellar order and reduced nonradiative recombination losses. The optimal acceptor, V-DYIC-4F, achieved a champion efficiency of 18.10% with the lowest energy loss of 0.556 eV in its devices paired with PM6 due to their efficient carrier transport, and suppressed recombination compared to other devices, being attributed to the synergistic effect of conformation and end group fluorination. The insights gained in this work contribute valuable knowledge of both synthetic control and structural determination of OAs, providing strategic design guidelines for the future development of dimeric acceptors toward high-efficiency PSCs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2024 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2024 Tipo del documento: Article País de afiliación: Suecia Pais de publicación: Alemania