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Role of aggregates ...
Role of aggregates and microstructure of mixed-ionic-electronic-conductors on charge transport in electrochemical transistors
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- LeCroy, Garrett (author)
- Stanford University
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- Cendra, Camila (author)
- Stanford University
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- Quill, Tyler J. (author)
- Stanford University
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- Moser, Maximilian (author)
- University Of Oxford
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- Hallani, Rawad (author)
- King Abdullah University of Science and Technology (KAUST)
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- Ponder Jr, James F. (author)
- UES Inc.,Air Force Research Laboratory
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- Stone, Kevin (author)
- Stanford University
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- Kang, Stephen D. (author)
- Stanford University
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- Liang, Allen Yu-Lun (author)
- Stanford University
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- Thiburce, Quentin (author)
- Stanford University
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- McCulloch, Iain (author)
- King Abdullah University of Science and Technology (KAUST),University Of Oxford
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- Spano, Frank C. (author)
- Temple University
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- Giovannitti, Alexander, 1987 (author)
- Stanford University,Chalmers tekniska högskola,Chalmers University of Technology
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- Salleo, Alberto (author)
- Stanford University
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Materials Horizons. - 2051-6355 .- 2051-6347. ; 10:7, s. 2568-2578
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https://doi.org/10.1...
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Abstract
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- Synthetic efforts have delivered a library of organic mixed ionic-electronic conductors (OMIECs) with high performance in electrochemical transistors. The most promising materials are redox-active conjugated polymers with hydrophilic side chains that reach high transconductances in aqueous electrolytes due to volumetric electrochemical charging. Current approaches to improve transconductance and device stability focus mostly on materials chemistry including backbone and side chain design. However, other parameters such as the initial microstructure and microstructural rearrangements during electrochemical charging are equally important and are influenced by backbone and side chain chemistry. In this study, we employ a polymer system to investigate the fundamental electrochemical charging mechanisms of OMIECs. We couple in situ electronic charge transport measurements and spectroelectrochemistry with ex situ X-ray scattering electrochemical charging experiments and find that polymer chains planarize during electrochemical charging. Our work shows that the most effective conductivity modulation is related to electrochemical accessibility of well-ordered, interconnected aggregates that host high mobility electronic charge carriers. Electrochemical stress cycling induces microstructural changes, but we find that these aggregates can largely maintain order, providing insights on the structural stability and reversibility of electrochemical charging in these systems. This work shows the importance of material design for creating OMIECs that undergo structural rearrangements to accommodate ions and electronic charge carriers during which percolating networks are formed for efficient electronic charge transport.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Transportteknik och logistik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Transport Systems and Logistics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
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- art (subject category)
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- By the author/editor
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LeCroy, Garrett
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Cendra, Camila
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Quill, Tyler J.
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Moser, Maximilia ...
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Hallani, Rawad
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Ponder Jr, James ...
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show more...
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Stone, Kevin
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Kang, Stephen D.
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Liang, Allen Yu- ...
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Thiburce, Quenti ...
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McCulloch, Iain
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Spano, Frank C.
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Giovannitti, Ale ...
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Salleo, Alberto
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Inorganic Chemis ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Civil Engineerin ...
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and Transport System ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Other Chemistry ...
- Articles in the publication
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Materials Horizo ...
- By the university
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Chalmers University of Technology