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Thermoelectric Properties of Polymeric Mixed Conductors
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-2930-676X
Linköping University, Department of Physics, Chemistry and Biology, Molecular Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-3899-4891
Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Molecular Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-1639-5735
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2016 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 26, no 34, 6288-6296 p.Article in journal (Refereed) Published
Abstract [en]

The thermoelectric (TE) phenomena are intensively explored by the scientific community due to the rather inefficient way energy resources are used with a large fraction of energy wasted in the form of heat. Among various materials, mixed ion-electron conductors (MIEC) are recently being explored as potential thermoelectrics, primarily due to their low thermal conductivity. The combination of electronic and ionic charge carriers in those inorganic or organic materials leads to complex evolution of the thermovoltage (Voc) with time, temperature, and/or humidity. One of the most promising organic thermoelectric materials, poly(3,4-ethyelenedioxythiophene)-polystyrene sulfonate (PEDOT-PSS), is an MIEC. A previous study reveals that at high humidity, PEDOT-PSS undergoes an ionic Seebeck effect due to mobile protons. Yet, this phenomenon is not well understood. In this work, the time dependence of the Voc is studied and its behavior from the contribution of both charge carriers (holes and protons) is explained. The presence of a complex reorganization of the charge carriers promoting an internal electrochemical reaction within the polymer film is identified. Interestingly, it is demonstrated that the time dependence behavior of Voc is a way to distinguish between three classes of polymeric materials: electronic conductor, ionic conductor, and mixed ionic–electronic conductor

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 26, no 34, 6288-6296 p.
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-133171DOI: 10.1002/adfm.201601106ISI: 000383609300015Scopus ID: 2-s2.0-84978042566OAI: oai:DiVA.org:liu-133171DiVA: diva2:1055411
Funder
EU, European Research Council, 307596
Note

Funding agencies: European Research Council (ERC) [307596]

Available from: 2016-12-12 Created: 2016-12-12 Last updated: 2017-02-03Bibliographically approved

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Ail, UjwalaJafari, Mohammad JavadWang, HuiEderth, ThomasBerggren, MagnusCrispin, Xavier
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