Molecular Cross-Linking Enhances Stability of Non-Fullerene Acceptor Organic PhotovoltaicsClick to copy article linkArticle link copied!
- Sangcheol YoonSangcheol YoonCenter for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, California 93106, United StatesMore by Sangcheol Yoon
- Braulio Reyes-SuárezBraulio Reyes-SuárezUniversity of Lille, CNRS, Centrale Lille Institut, Université d’Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, Lille F-59000, FranceMore by Braulio Reyes-Suárez
- Sang T. PhamSang T. PhamBragg Centre for Materials Research & School of Chemical and Process Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United KingdomMore by Sang T. Pham
- Hervé VezinHervé VezinUniversity of Lille, CNRS UMR 8516 − LASIRE − Laboratoire de Spectroscopie pour les Interactions la Réactivité et l’Environnement, Lille 59000, FranceMore by Hervé Vezin
- Yeny A. TobonYeny A. TobonUniversity of Lille, CNRS UMR 8516 − LASIRE − Laboratoire de Spectroscopie pour les Interactions la Réactivité et l’Environnement, Lille 59000, FranceMore by Yeny A. Tobon
- Myeongjae LeeMyeongjae LeeDepartment of Chemistry,Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of KoreaMore by Myeongjae Lee
- Sam MugiranezaSam MugiranezaCenter for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, California 93106, United StatesMore by Sam Mugiraneza
- Brian Minki KimBrian Minki KimCenter for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, California 93106, United StatesMore by Brian Minki Kim
- Mariane Yuka Tsubaki OideMariane Yuka Tsubaki OideCenter for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, California 93106, United StatesDepartment of Metallurgical and Materials Engineering, University of São Paulo, São Paulo 05508-030, BrazilMore by Mariane Yuka Tsubaki Oide
- Seongju YooSeongju YooGraduate School of Carbon Neutrality,Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of KoreaMore by Seongju Yoo
- Seunggu LeeSeunggu LeeDepartment of Physics, Department of Information Display, Research Institute of Basic Sciences, Kyung Hee University, Seoul 02447, Republic of KoreaMore by Seunggu Lee
- Shu Hui WangShu Hui WangDepartment of Metallurgical and Materials Engineering, University of São Paulo, São Paulo 05508-030, BrazilMore by Shu Hui Wang
- Sean M. CollinsSean M. CollinsBragg Centre for Materials Research & School of Chemical and Process Engineering, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United KingdomSchool of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United KingdomMore by Sean M. Collins
- Christopher M. BatesChristopher M. BatesDepartment of Materials, Department of Chemistry and Biochemistry, Department of Chemical Engineering, University of California Santa Barbara (UCSB), Santa Barbara, California 93106, United StatesMore by Christopher M. Bates
- Yongsup ParkYongsup ParkDepartment of Physics, Department of Information Display, Research Institute of Basic Sciences, Kyung Hee University, Seoul 02447, Republic of KoreaMore by Yongsup Park
- BongSoo Kim*BongSoo Kim*Email: [email protected]Department of Chemistry, Graduate School of Semiconductor Materials and Device Engineering and Graduate School of Carbon Neutrality,Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of KoreaMore by BongSoo Kim
- G. N. Manjunatha Reddy*G. N. Manjunatha Reddy*Email: [email protected]University of Lille, CNRS, Centrale Lille Institut, Université d’Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, Lille F-59000, FranceMore by G. N. Manjunatha Reddy
- Thuc-Quyen Nguyen*Thuc-Quyen Nguyen*Email: [email protected]Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, California 93106, United StatesMore by Thuc-Quyen Nguyen
Abstract
Understanding efficiency–durability relationships and related mitigation strategies is an important step toward the commercialization of organic photovoltaics (OPVs). Here, we report that a photoactivated 6-bridged azide cross-linker (6Bx) improves the morphological stability by suppressing the thermally activated diffusion of (Y6) acceptor molecules in PM6:Y6 bulk-heterojunction (BHJ)-based OPVs. Cross-linked PM6:Y6 (0.05 wt % 6Bx) BHJ OPVs retain 93.4% of the initial power conversion efficiency upon thermal aging at 85 °C for 1680 h (T80 = 3290 h). Molecular origins of enhanced thermal stability are corroborated by optical spectroscopy, surface imaging, 2D solid-state nuclear magnetic resonance (ssNMR), Raman spectroscopy, scanning electron diffraction (SED) measurements, and analysis of the BHJ thin films. The facile single-step cross-linking strategy in conjugation with advanced characterization methods presented in the study paves the way toward developing durable OPVs based on non-fullerene acceptors (NFAs).
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