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Hybrid Alkyl-Ethylene Glycol Side Chains Enhance Substrate Adhesion and Operational Stability in Accumulation Mode Organic Electrochemical Transistors
Sun Yat Sen Univ, Key Lab Polymer Composite & Funct Mat, Minist Educ, Sch Mat Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China..
KTH, School of Electrical Engineering and Computer Science (EECS), Intelligent systems, Micro and Nanosystems. UNSW, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia ; UNSW, Ctr Adv Macromol Design, Sydney, NSW 2052, Australia.ORCID iD: 0000-0002-6428-0633
Sun Yat Sen Univ, Key Lab Polymer Composite & Funct Mat, Minist Educ, Sch Mat Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China..
Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China..
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2019 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 31, no 23, p. 9797-9806Article in journal (Refereed) Published
Abstract [en]

Donor-acceptor copolymers featuring electron-deficient isoindigo units and electron-rich 3,4-ethyl-E enedioxy (EDOT) groups are presented as new materials for accumulation mode organic electrochemical transistors (OECTs). Grafting hybrid alkyl-ethylene glycol side chains on the isoindigo units of the copolymer leads to OECTs with outstanding substrate adhesion and operational stability in contact with an aqueous electrolyte, as demonstrated by their preserved performance after extensive ultrasonication (1.5 h) or after continuous on-off switching for over 6 h. Hybrid side chains outperform copolymers with alkyl only or ethylene glycol only side chains, which retain only 27% and 10% of the on currents after 40 min of on-off switching, respectively, under the same biasing conditions. These devices are promising candidates for in vitro and in vivo bioelectronics, applications where stability as well as robust adhesion of the conjugated polymer to the substrate are essential.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2019. Vol. 31, no 23, p. 9797-9806
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Materials Chemistry
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URN: urn:nbn:se:kth:diva-266438DOI: 10.1021/acs.chemmater.9b03798ISI: 000502418000023Scopus ID: 2-s2.0-85075701496OAI: oai:DiVA.org:kth-266438DiVA, id: diva2:1385660
Note

QC 20200115

Available from: 2020-01-15 Created: 2020-01-15 Last updated: 2020-02-04Bibliographically approved

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Zeglio, EricaHerland, Anna

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