From p- to n-Type Mixed Conduction in Isoindigo-Based Polymers through Molecular Design

Parr, Zachary S.; Borges‐González, Jorge; Rashid, Reem B.; Thorley, Karl J.; Meli, Dilara; Paulsen, Bryan D.; Strzalka, Joseph; Rivnay, Jonathan; Nielsen, Christian B.

doi:10.1002/adma.202107829

Title: From p- to n-Type Mixed Conduction in Isoindigo-Based Polymers through Molecular Design

Journal Article · 23 February 2022 · Advanced Materials

DOI: https://doi.org/10.1002/adma.202107829 · OSTI ID:1869171

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Queen Mary Univ. of London (United Kingdom)
Northwestern Univ., Evanston, IL (United States)
Univ. of Kentucky, Lexington, KY (United States)
Argonne National Lab. (ANL), Lemont, IL (United States)

Organic mixed ionic and electronic conductors are of significant interest for bioelectronic applications. Here, we use three different isoindigoid building blocks to obtain polymeric mixed conductors with vastly different structural and electronic properties which can be further fine-tuned through the choice of comonomer unit. We show how careful design of the isoindigoid scaffold can afford highly planar polymer structures with high degrees of electronic delocalization, while subtle structural modifications can control the dominant charge carrier (hole or electron) when probed in organic electrochemical transistors. We employ a combination of experimental and computational techniques to probe electrochemical, structural and mixed ionic and electronic properties of the polymer series which in turn allows us to derive important structure-property relations for this promising class of materials in the context of organic bioelectronics. Ultimately, we use these findings to outline robust molecular design strategies for isoindigo-based mixed conductors that can support efficient p-type, n-type and ambipolar transistor operation in an aqueous environment.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: Academy of Medical Sciences & Wellcome Trust; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1869171

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 14 Vol. 34; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
donor-acceptor polymers
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Title: From p- to n-Type Mixed Conduction in Isoindigo-Based Polymers through Molecular Design

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