| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Giovannitti, Alexander
Chalmers University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Role of aggregates and microstructure of mixed-ionic-electronic-conductors on charge transport in electrochemical transistors.citations
- 2023An ordered, self-assembled nanocomposite with efficient electronic and ionic transport.citations
- 2023Controlling swelling in mixed transport polymers through alkyl side-chain physical cross-linking.citations
- 2022Efficient Electronic Tunneling Governs Transport in Conducting Polymer-Insulator Blends.citations
- 2022Tuning Organic Electrochemical Transistor Threshold Voltage using Chemically Doped Polymer Gates.citations
- 2020Side Chain Redistribution as a Strategy to Boost Organic Electrochemical Transistor Performance and Stabilitycitations
- 2020Side Chain Redistribution as a Strategy to Boost Organic Electrochemical Transistor Performance and Stability.citations
- 2019Reversible Electronic Solid-Gel Switching of a Conjugated Polymercitations
- 2018The Role of the Side Chain on the Performance of N-type Conjugated Polymers in Aqueous Electrolytes
- 2018The Role of the Side Chain on the Performance of N-type Conjugated Polymers in Aqueous Electrolytes.
- 2018Enhanced n-Doping Efficiency of a Naphthalenediimide-Based Copolymer through Polar Side Chains for Organic Thermoelectricscitations
Places of action
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article
Role of aggregates and microstructure of mixed-ionic-electronic-conductors on charge transport in electrochemical transistors.
Abstract
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.