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Ferroelectric polarization induces electronic nonlinearity in ion-doped conducting polymers
Linköping University, Sweden.
Linköping University, Sweden.
RISE - Research Institutes of Sweden, ICT, Acreo. LINTEC Corporation, Japan.
Linköping University, Sweden; Aix-Marseille University, France.
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2017 (English)In: Science Advances, E-ISSN 2375-2548, Vol. 3, no 6, article id e1700345Article in journal (Refereed) Published
Abstract [en]

Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) is an organic mixed ion-electron conducting polymer. The PEDOT phase transports holes and is redox-active, whereas the PSS phase transports ions. When PEDOT is redox-switched between its semiconducting and conducting state, the electronic and optical properties of its bulk are controlled. Therefore, it is appealing to use this transition in electrochemical devices and to integrate those into large-scale circuits, such as display or memory matrices. Addressability and memory functionality of individual devices, within these matrices, are typically achieved by nonlinear current-voltage characteristics and bistability—functions that can potentially be offered by the semiconductor-conductor transition of redox polymers. However, low conductivity of the semiconducting state and poor bistability, due to self-discharge, make fast operation and memory retention impossible. We report that a ferroelectric polymer layer, coated along the counter electrode, can control the redox state of PEDOT. The polarization switching characteristics of the ferroelectric polymer, which take place as the coercive field is overcome, introduce desired nonlinearity and bistability in devices that maintain PEDOT in its highly conducting and fast-operating regime. Memory functionality and addressability are demonstrated in ferro-electrochromic display pixels and ferro-electrochemical transistors. 

Place, publisher, year, edition, pages
American Association for the Advancement of Science , 2017. Vol. 3, no 6, article id e1700345
Keywords [en]
Current voltage characteristics, Display devices, Electric discharges, Ferroelectricity, Ions, Optical properties, Polarization, Redox reactions, Semiconductor devices, Electrochemical devices, Electrochemical transistors, Electrochromic displays, Electron-conducting polymers, Electronic and optical properties, Ferroelectric polarization, Non-linear current-voltage characteristics, Poly-3, 4-ethylenedioxythiophene, Conducting polymers
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Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-38075DOI: 10.1126/sciadv.1700345Scopus ID: 2-s2.0-85040951990OAI: oai:DiVA.org:ri-38075DiVA, id: diva2:1296452
Available from: 2019-03-15 Created: 2019-03-15 Last updated: 2019-03-19Bibliographically approved

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