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Green Synthesis of Lactone-Based Conjugated Polymers for n-Type Organic Electrochemical Transistors
KTH, School of Electrical Engineering and Computer Science (EECS), Intelligent systems, Micro and Nanosystems.ORCID iD: 0000-0002-6428-0633
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2022 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 32, no 16, article id 2111439Article in journal (Refereed) Published
Abstract [en]

As new and better materials are implemented for organic electrochemical transistors (OECTs), it becomes increasingly important to adopt more economic and environmentally friendly synthesis pathways with respect to conventional transition-metal-catalyzed polymerizations. Herein, a series of novel n-type donor–acceptor-conjugated polymers based on glycolated lactone and bis-isatin units are reported. All the polymers are synthesized via green and metal-free aldol polymerization. The strong electron-deficient lactone-building blocks provide low-lying lowest unoccupied molecular orbital (LUMO) and the rigid backbone needed for efficient electron mobility up to 0.07 cm2 V−1 s−1. Instead, polar atoms in the backbone and ethylene glycol side chains contribute to the ionic conductivity. The resulting OECTs exhibit a normalized maximum transconductance gm,norm of 0.8 S cm−1 and a μC* of 6.7 F cm−1 V−1 s−1. Data on the microstructure show that such device performance originates from a unique porous morphology together with a highly disordered amorphous microstructure, leading to efficient ion-to-electron coupling. Overall, the design strategy provides an inexpensive and metal-free polymerization route for high-performing n-type OECTs. 

Place, publisher, year, edition, pages
Wiley , 2022. Vol. 32, no 16, article id 2111439
Keywords [en]
conjugated polymer, green chemistry, n-type organic semiconductor, organic electrochemical transistor, sustainable design, Conjugated polymers, Ethylene, Ethylene glycol, Functional materials, Ketones, Microstructure, Molecular orbitals, Morphology, Polymerization, Transition metals, Based conjugated polymers, Catalyzed polymerization, Conventional transitions, Donor-acceptor conjugated polymers, Environmentally friendly synthesis, Green synthesis, Metal free, Metal-catalyzed, Organic electrochemical transistors, Synthesis pathways, Esters
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Other Physics Topics Energy Engineering Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-317506DOI: 10.1002/adfm.202111439ISI: 000737074000001Scopus ID: 2-s2.0-85122159843OAI: oai:DiVA.org:kth-317506DiVA, id: diva2:1696739
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QC 20220919

Available from: 2022-09-19 Created: 2022-09-19 Last updated: 2022-09-19Bibliographically approved

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Zeglio, EricaHerland, Anna

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