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Charge transport and structure in semimetallic polymers
University of South Australia, Australia.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
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2018 (English)In: Journal of Polymer Science Part B: Polymer Physics, ISSN 0887-6266, E-ISSN 1099-0488, Vol. 56, no 1, p. 97-104Article in journal (Refereed) Published
Abstract [en]

Owing to changes in their chemistry and structure, polymers can be fabricated to demonstrate vastly different electrical conductivities over many orders of magnitude. At the high end of conductivity is the class of conducting polymers, which are ideal candidates for many applications in low-cost electronics. Here, we report the influence of the nature of the doping anion at high doping levels within the semi-metallic conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) on its electronic transport properties. Hall effect measurements on a variety of PEDOT samples show that the choice of doping anion can lead to an order of magnitude enhancement in the charge carrier mobilityamp;gt;3 cm(2)/Vs at conductivities approaching 3000 S/cm under ambient conditions. Grazing Incidence Wide Angle X-ray Scattering, Density Functional Theory calculations, and Molecular Dynamics simulations indicate that the chosen doping anion modifies the way PEDOT chains stack together. This link between structure and specific anion doping at high doping levels has ramifications for the fabrication of conducting polymer-based devices. (c) 2017 The Authors. Journal of Polymer Science Part B: Polymer Physics Published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018, 56, 97-104

Place, publisher, year, edition, pages
WILEY , 2018. Vol. 56, no 1, p. 97-104
Keywords [en]
charge transport; conducting polymers; DFT; DFT calculations; GIWAXS; MD simulations; molecular dynamics; WAXS
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-143605DOI: 10.1002/polb.24530ISI: 000416013700009OAI: oai:DiVA.org:liu-143605DiVA, id: diva2:1165646
Note

Funding Agencies|European Research Council (ERC-starting-grant) [307596]; Swedish foundation for strategic research; Knut and Alice Wallenberg foundation; Swedish Energy Agency [38332 - 1]; Swedish Research Council [2016 - 05990]; Advanced Functional Materials Center at Linkoping University; Australian Research Council through the Future Fellowship scheme [FT160100300]; European Research Council (ERC-consolidator-grant) [681881]

Available from: 2017-12-13 Created: 2017-12-13 Last updated: 2018-01-05

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Franco Gonzalez, FelipeSingh, Sandeep KumarUllah Khan, ZiaCrispin, XavierZozoulenko, Igor
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