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  • Xu, KaiLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Yanshan Univ, Peoples R China (author)

On the Origin of Seebeck Coefficient Inversion in Highly Doped Conducting Polymers

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-02-05
  • Wiley-V C H Verlag GMBH,2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-182954
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-182954URI
  • https://doi.org/10.1002/adfm.202112276DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Funding Agencies|Swedish Research CouncilSwedish Research CouncilEuropean Commission [2020-03243]; Olle Engkvists Stiftelse [204-0256]; European CommissionEuropean CommissionEuropean Commission Joint Research Centre [GA-955837, GA-799477]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [SFO-Mat-LiU 2009-00971]; Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germanys Excellence Strategy via the Excellence Cluster 3D Matter Made to OrderGerman Research Foundation (DFG) [EXC-2082/1-390761711]; Carl Zeiss Foundation; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [FA 1502/1-1]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [52173156]; Swedish Foundation for Strategic ResearchSwedish Foundation for Strategic Research [ITM17-0316]
  • 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 and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Ruoko, Tero-PetriLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Tampere Univ, Finland(Swepub:liu)terru30 (author)
  • Shokrani, MortezaHeidelberg Univ, Germany (author)
  • Scheunemann, DorotheaHeidelberg Univ, Germany (author)
  • Abdalla, Hassan,1987-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)hasab54 (author)
  • Sun, HengdaLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Donghua Univ, Peoples R China(Swepub:liu)hensu35 (author)
  • Yang, ChiyuanLinköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten(Swepub:liu)chiya01 (author)
  • Puttisong, Yuttapoom,1984-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)yutpu33 (author)
  • Kolhe, Nagesh B.Univ Washington, WA 98195 USA; Univ Washington, WA 98195 USA (author)
  • Mendoza Figueroa, SilvestreLinköpings universitet,Biofysik och bioteknik,Tekniska fakulteten(Swepub:liu)josme81 (author)
  • Oshaug Pedersen, JonasLinköpings universitet,Biofysik och bioteknik,Tekniska fakulteten(Swepub:liu)jonpe02 (author)
  • Ederth, Thomas,1969-Linköpings universitet,Biofysik och bioteknik,Tekniska fakulteten(Swepub:liu)thoed88 (author)
  • Chen, Weimin,1959-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten(Swepub:liu)weich55 (author)
  • Berggren, Magnus,Professor,1968-Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,N Ink AB, Teknikringen 7, SE-58330 Linkoping, Sweden(Swepub:liu)magbe98 (author)
  • Jenekhe, Samson A.Univ Washington, WA 98195 USA; Univ Washington, WA 98195 USA (author)
  • Fazzi, DanieleUniv Bologna, Italy; Univ Cologne, Germany (author)
  • Kemerink, Martijn,1970-Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten,Heidelberg Univ, Germany(Swepub:liu)marke89 (author)
  • Fabiano, Simone,1985-Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,N Ink AB, Teknikringen 7, SE-58330 Linkoping, Sweden(Swepub:liu)simfa84 (author)
  • Linköpings universitetLaboratoriet för organisk elektronik (creator_code:org_t)

Related titles

  • In:Advanced Functional Materials: Wiley-V C H Verlag GMBH32:201616-301X1616-3028

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