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Measurements of Ambipolar Seebeck Coefficients in High-Mobility Diketopyrrolopyrrole Donor–Acceptor Copolymers

  • Katharina Broch
  • , Deepak Venkateshvaran
  • , Vincent Lemaur
  • , Yoann Olivier
  • , David Beljonne
  • , Mateusz Zelazny
  • , Iyad Nasrallah
  • , David J. Harkin
  • , Martin Statz
  • , Riccardo Di Pietro
  • , Auke Jisk Kronemeijer
  • , Henning Sirringhaus

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

The Seebeck coefficient of both electrons and holes in a family of ambipolar diketopyrrolopyrrole copolymers is investigated using field-effect gated measurements. It is found that at high carrier concentrations the magnitude of the Seebeck coefficients is not strongly dependent on the molecular structure of the backbone within this family of polymers. Additionally, the Seebeck coefficients of electrons and holes have very similar magnitudes showing that electrons and holes experience a similar energetic landscape. Subtle differences in the carrier concentration dependence between the polymers are observed, which are interpreted in terms of different degrees of energetic disorder on the basis of molecular dynamics and electronic structure simulations.

langue originaleAnglais
Numéro d'article1700225
journalAdvanced Electronic Materials
Volume3
Numéro de publication11
Les DOIs
Etat de la publicationPublié - 1 nov. 2017
Modification externeOui

Financement

The authors gratefully acknowledge financial support from the European Research Council (ERC) through a synergy grant (No. 610115) and the Engineering and Physical Sciences Research Council (EPSRC). The work in the Laboratory for Chemistry of Novel Materials was supported by the European Commission/R\u00E9gion Wallonne (FEDER \u2013 BIORGEL project), the Interuniversity Attraction Pole program of the Belgian Federal Science Policy Office (PAI 7/05), the Programme d\u2019Excellence de la R\u00E9gion Wallonne (OPTI2MAT project), the Consortium des \u00C9quipements de Calcul Intensif (C\u00C9CI), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11, and FRS-FNRS, the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 646176 (EXTMOS project). D.B. is an FNRS Research Director. K.B. gratefully acknowledges financial support from the German Research Foundation (BR 4869/1-1) and the Institutional Strategy of the University of Tuebingen (Deutsche Forschungsgemeinschaft ZUK63).

Bailleurs de fondsNuméro du bailleur de fonds
European Commission/Région Wallonne
European commission
Consortium des Équipements de Calcul Intensif
University of Tuebingen
Engineering and Physical Sciences Research Council
European Research Council
European Regional Development Fund
Horizon 2020
Fonds De La Recherche Scientifique - FNRS2.5020.11
Belgian Science Policy OfficePAI 7/05
Seventh Framework Programme610115
Deutsche ForschungsgemeinschaftZUK63, BR 4869/1-1
Horizon 2020 Framework Programme646176

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