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dc.contributor.authorMoser, Maximilian
dc.contributor.authorSavagian, Lisa R.
dc.contributor.authorSavva, Achilleas
dc.contributor.authorMatta, Micaela
dc.contributor.authorPonder, James F.
dc.contributor.authorHidalgo, Tania Cecilia
dc.contributor.authorohayon, David
dc.contributor.authorHallani, Rawad
dc.contributor.authorReisjalali, Maryam
dc.contributor.authorTroisi, Alessandro
dc.contributor.authorWadsworth, Andrew
dc.contributor.authorReynolds, John R.
dc.contributor.authorInal, Sahika
dc.contributor.authorMcCulloch, Iain
dc.date.accessioned2020-07-23T06:56:32Z
dc.date.available2020-07-23T06:56:32Z
dc.date.issued2020-07-22
dc.date.submitted2020-05-14
dc.identifier.citationMoser, M., Savagian, L. R., Savva, A., Matta, M., Ponder, J. F., Hidalgo, T. C., … McCulloch, I. (2020). Ethylene Glycol-Based Side Chain Length Engineering in Polythiophenes and its Impact on Organic Electrochemical Transistor Performance. Chemistry of Materials. doi:10.1021/acs.chemmater.0c02041
dc.identifier.issn0897-4756
dc.identifier.issn1520-5002
dc.identifier.doi10.1021/acs.chemmater.0c02041
dc.identifier.urihttp://hdl.handle.net/10754/664370
dc.description.abstractReplacing the alkyl side chains on conventional semiconducting polymers with ethylene glycol (EG)-based chains is a successful strategy in the molecular design of mixed conduction materials for bioelectronic devices, including organic electrochemical transistors (OECTs). Such polymers have demonstrated the capability to conduct both ionic and electronic charges and can offer superior performance compared to the most commonly used active material, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate). While many research efforts have been dedicated to optimizing OECT performance through the engineering of the semiconducting polymers’ conjugated backbones, variation of the EG chain length has been investigated considerably less. In this work, a series of glycolated polythiophenes with pendant EG chains spanning two to six EG repeat units was synthesized and the electrochemical and structural characteristics of the resulting films were characterized by experimental means and molecular dynamics simulations. OECTs were fabricated and tested, and their performance showed a strong correlation to the the EG side chain length, thereby elucidating important structure−property guidelines for the molecular design of future channel materials. Specifically, a careful balance in the EG length must be struck during the design of EG-functionalized conjugated polymers for OECTs. While minimizing the EG side chain length appears to boost both the capacitive and charge carrier transport properties of the polymers, the chosen EG side chain length must be kept sufficiently long to induce solubility for processing, and allow for the necessary ion interactions with the conjugated polymer backbone.
dc.description.sponsorshipWe acknowledge generous funding from KAUST for financial support. The research reported in this publication was supported by funding from King Abdullah University of Science and Technology Office of Sponsored Research (OSR) under awards nos. OSR-2018-CARF/CCF-3079, OSR-2015-CRG4-2572, and OSR-4106 CPF2019. We acknowledge EC FP7 Project SC2 (610115), EC H2020 (643791), and EPSRC Projects EP/G037515/1, EP/M005143/1, and EP/L016702/1. J.R.R. acknowledges funding of this work from the Office of Naval Research (N00014-18-1-2222) and the Air Force Office of Scientific Research (FA9550-18-1-0184). L.R.S. was supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1650044. M.M.acknowledges financial support of the Royal Society in the form of a Newton International Fellowship (NIF\R1\181379). Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-76SF00515. S.I. acknowledges funding from KAUST Office of Sponsored Research (OSR) under Award No. OSR-2018-CRG7-3709.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acs.chemmater.0c02041
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.chemmater.0c02041.
dc.titleEthylene Glycol-Based Side Chain Length Engineering in Polythiophenes and its Impact on Organic Electrochemical Transistor Performance
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentOrganic Bioelectronics Laboratory, Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
dc.contributor.departmentBioscience Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentChemical Science Program
dc.identifier.journalChemistry of Materials
dc.rights.embargodate2021-07-22
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Chemistry and Centre for Plastic Electronics, Imperial College London, London W12 0BZ, United Kingdom
dc.contributor.institutionSchool of Materials Science & Engineering, School of Chemistry & Biochemistry, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332-0100, United States
dc.contributor.institutionDepartment of Chemistry, University of Liverpool, Liverpool L69 7ZD, United Kingdom
dc.contributor.institutionDepartment of Chemistry, University of Oxford, Oxford OX1 3TA, United Kingdom
kaust.personSavva, Achilleas
kaust.personHidalgo, Tania Cecilia
kaust.personOhayon, David
kaust.personHallani, Rawad
kaust.personInal, Sahika
kaust.personMcCulloch, Iain
kaust.grant.numberOSR-2015-CRG4-2572
kaust.grant.numberOSR-2018-CARF/CCF-3079
dc.date.accepted2020-07-02
kaust.acknowledged.supportUnitCCF
kaust.acknowledged.supportUnitKAUST Office of Sponsored Research (OSR)
kaust.acknowledged.supportUnitOffice of Naval Research


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