Spectroelectrochemistry and Nature of Charge Carriers in Self-Doped Conducting Polymer

Volkov, Anton (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Singh, Sandeep Kumar (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Stavrinidou, Eleni (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Gabrielsson, Roger (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Franco Gonzalez, Felipe (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Cruce, Alex (author): Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten,Funktionella elektroniska material

Chen, Weimin (author): Linköpings universitet,Ytors Fysik och Kemi,Tekniska fakulteten,Funktionella elektroniska material

Simon, Daniel (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Berggren, Magnus (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

Zozoulenko, Igor (author): Linköpings universitet,Fysik och elektroteknik,Tekniska fakulteten

(creator_code:org_t)

2017-06-06
2017
English.
In: Advanced Electronic Materials. - : Wiley-VCH Verlagsgesellschaft. - 2199-160X. ; 3:8

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Abstract Subject headings

A recently developed water-soluble self-doped sodium salt of bis[3,4-ethylenedioxythiophene] 3thiophene butyric acid (ETE-S) is electropolymerized and characterized by means of spectroelectrochemistry, electron paramagnetic resonance spectroscopy, and cyclic voltammetry, combined with the density functional theory (DFT) and time-dependent DFT calculations. The focus of the studies is to underline the nature of the charge carriers when the electrochemically polymerized ETE-S films undergo a reversible transition from reduced to electrically conductive oxidized states. Spectroelectrochemistry shows clear distinctions between absorption features from reduced and charged species. In the reduced state, the absorption spectrum of ETE-S electropolymerized film shows a peak that is attributed to HOMO. LUMO transition. As the oxidation level increases, this peak diminishes and the absorption of the film is dominated by spinless bipolaronic states with some admixture of polaronic states possessing a magnetic momentum. For fully oxidized samples, the bipolaronic states fully dominate, and the features in the absorption spectra are related to the drastic changes of the band structure, exhibiting a strong decrease of the band gap when a polymeric film undergoes oxidation.

By the author/editor: Volkov, Anton; Singh, Sandeep K ...; Stavrinidou, Ele ...; Gabrielsson, Rog ...; Franco Gonzalez, ...; Cruce, Alex; show more...; Chen, Weimin; Simon, Daniel; Berggren, Magnus; Zozoulenko, Igor; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Other Materials ...

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