Intrinsically stretchable organic photovoltaics by redistributing strain to PEDOT:PSS with enhanced stretchability and interfacial adhesion

Jiachen Wang, Yuto Ochiai, Niannian Wu, Kiyohiro Adachi, Daishi Inoue, Daisuke Hashizume, Desheng Kong, Naoji Matsuhisa, Tomoyuki Yokota, Qiang Wu, Wei Ma, Lulu Sun, Sixing Xiong, Baocai Du, Wenqing Wang, Chih-Jen Shih, Keisuke Tajima, Takuzo Aida, Kenjiro Fukuda () and Takao Someya ()
Additional contact information
Jiachen Wang: The University of Tokyo
Yuto Ochiai: RIKEN Center for Emergent Matter Science (CEMS)
Niannian Wu: RIKEN Center for Emergent Matter Science (CEMS)
Kiyohiro Adachi: RIKEN Center for Emergent Matter Science (CEMS)
Daishi Inoue: RIKEN Center for Emergent Matter Science (CEMS)
Daisuke Hashizume: RIKEN Center for Emergent Matter Science (CEMS)
Desheng Kong: Nanjing University
Naoji Matsuhisa: The University of Tokyo
Tomoyuki Yokota: The University of Tokyo
Qiang Wu: Xi’an Jiaotong University
Wei Ma: Xi’an Jiaotong University
Lulu Sun: RIKEN
Sixing Xiong: RIKEN Center for Emergent Matter Science (CEMS)
Baocai Du: The University of Tokyo
Wenqing Wang: The University of Tokyo
Chih-Jen Shih: ETH Zurich
Keisuke Tajima: RIKEN Center for Emergent Matter Science (CEMS)
Takuzo Aida: RIKEN Center for Emergent Matter Science (CEMS)
Kenjiro Fukuda: RIKEN Center for Emergent Matter Science (CEMS)
Takao Someya: The University of Tokyo

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Intrinsically stretchable organic photovoltaics have emerged as a prominent candidate for the next-generation wearable power generators regarding their structural design flexibility, omnidirectional stretchability, and in-plane deformability. However, formulating strategies to fabricate intrinsically stretchable organic photovoltaics that exhibit mechanical robustness under both repetitive strain cycles and high tensile strains remains challenging. Herein, we demonstrate high-performance intrinsically stretchable organic photovoltaics with an initial power conversion efficiency of 14.2%, exceptional stretchability (80% of the initial power conversion efficiency maintained at 52% tensile strain), and cyclic mechanical durability (95% of the initial power conversion efficiency retained after 100 strain cycles at 10%). The stretchability is primarily realised by delocalising and redistributing the strain in the active layer to a highly stretchable PEDOT:PSS electrode developed with a straightforward incorporation of ION E, which simultaneously enhances the stretchability of PEDOT:PSS itself and meanwhile reinforces the interfacial adhesion with the polyurethane substrate. Both enhancements are pivotal factors ensuring the excellent mechanical durability of the PEDOT:PSS electrode, which further effectively delays the crack initiation and propagation in the top active layer, and enables the limited performance degradation under high tensile strains and repetitive strain cycles.

Date: 2024
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DOI: 10.1038/s41467-024-49352-4

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