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 originale | Anglais |
|---|---|
| Numéro d'article | 1700225 |
| journal | Advanced Electronic Materials |
| Volume | 3 |
| Numéro de publication | 11 |
| Les DOIs | |
| Etat de la publication | Publié - 1 nov. 2017 |
| Modification externe | Oui |
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 fonds | Numéro 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 - FNRS | 2.5020.11 |
| Belgian Science Policy Office | PAI 7/05 |
| Seventh Framework Programme | 610115 |
| Deutsche Forschungsgemeinschaft | ZUK63, BR 4869/1-1 |
| Horizon 2020 Framework Programme | 646176 |
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