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On the Origin of Se...
On the Origin of Seebeck Coefficient Inversion in Highly Doped Conducting Polymers
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- Xu, Kai (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Yanshan Univ, Peoples R China
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- Ruoko, Tero-Petri (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Tampere Univ, Finland
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- Shokrani, Morteza (author)
- Heidelberg Univ, Germany
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- Scheunemann, Dorothea (author)
- Heidelberg Univ, Germany
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- Abdalla, Hassan, 1987- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Sun, Hengda (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Donghua Univ, Peoples R China
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- Yang, Chiyuan (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten
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- Puttisong, Yuttapoom, 1984- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Kolhe, Nagesh B. (author)
- Univ Washington, WA 98195 USA; Univ Washington, WA 98195 USA
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- Mendoza Figueroa, Silvestre (author)
- Linköpings universitet,Biofysik och bioteknik,Tekniska fakulteten
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- Oshaug Pedersen, Jonas (author)
- Linköpings universitet,Biofysik och bioteknik,Tekniska fakulteten
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- Ederth, Thomas, 1969- (author)
- Linköpings universitet,Biofysik och bioteknik,Tekniska fakulteten
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- Chen, Weimin, 1959- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Berggren, Magnus, Professor, 1968- (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,N Ink AB, Teknikringen 7, SE-58330 Linkoping, Sweden
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- Jenekhe, Samson A. (author)
- Univ Washington, WA 98195 USA; Univ Washington, WA 98195 USA
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- Fazzi, Daniele (author)
- Univ Bologna, Italy; Univ Cologne, Germany
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- Kemerink, Martijn, 1970- (author)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Heidelberg Univ, Germany
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- Fabiano, Simone, 1985- (author)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,N Ink AB, Teknikringen 7, SE-58330 Linkoping, Sweden
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(creator_code:org_t)
- 2022-02-05
- 2022
- English.
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In: Advanced Functional Materials. - : Wiley-V C H Verlag GMBH. - 1616-301X .- 1616-3028. ; 32:20
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Abstract
Subject headings
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- A common way of determining the majority charge carriers of pristine and doped semiconducting polymers is to measure the sign of the Seebeck coefficient. However, a polarity change of the Seebeck coefficient has recently been observed to occur in highly doped polymers. Here, it is shown that the Seebeck coefficient inversion is the result of the density of states filling and opening of a hard Coulomb gap around the Fermi energy at high doping levels. Electrochemical n-doping is used to induce high carrier density (>1 charge/monomer) in the model system poly(benzimidazobenzophenanthroline) (BBL). By combining conductivity and Seebeck coefficient measurements with in situ electron paramagnetic resonance, UV-vis-NIR, Raman spectroelectrochemistry, density functional theory calculations, and kinetic Monte Carlo simulations, the formation of multiply charged species and the opening of a hard Coulomb gap in the density of states, which is responsible for the Seebeck coefficient inversion and drop in electrical conductivity, are uncovered. The findings provide a simple picture that clarifies the roles of energetic disorder and Coulomb interactions in highly doped polymers and have implications for the molecular design of next-generation conjugated polymers.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- conducting polymers; organic electrochemical transistor; Seebeck coefficient; thermoelectric application
Publication and Content Type
- ref (subject category)
- art (subject category)
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Xu, Kai
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Ruoko, Tero-Petr ...
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Shokrani, Mortez ...
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Scheunemann, Dor ...
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Abdalla, Hassan, ...
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Sun, Hengda
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Yang, Chiyuan
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Puttisong, Yutta ...
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Kolhe, Nagesh B.
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Mendoza Figueroa ...
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Oshaug Pedersen, ...
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Ederth, Thomas, ...
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Chen, Weimin, 19 ...
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Berggren, Magnus ...
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Jenekhe, Samson ...
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Fazzi, Daniele
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Kemerink, Martij ...
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Fabiano, Simone, ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Linköping University