Giant Photo-Magneto-Thermoelectric Effect of End-On Oriented PEDOT Grown from Self-Assembled 3D Tectons

Byeonggwan Kim, Cheolhyun Cho, Minsu Han, André Jean Attias, Eunkyoung Kim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Conductive polymers (CPs) are arranged in the end-on direction on graphene surfaces using 3D tectons of ZnPc assemblies, to control carrier transport from hot to cold via external magnetic fields. Poly(3,4-ethylenedioxythiophene)s doped with tosylate are synthesized using monomer seeds that are complexed through pyridine units to 3D tectons on graphene via surface-confined host-guest chemistry, to provide an end-on-oriented polymer film on graphene with a high degree of crystallinity. The film shows free-electron-like charge transport properties, with an enhanced Hall mobility, and an increased Seebeck coefficient compared to the CP on graphene that is prepared without 3D tectons. A magneto-thermoelectric (MTE) effect is reproducibly observed for the film device. Taking advantage of a large photothermal effect of the polymer film, a photon-mode MTE effect is demonstrated for the first time. Both dark and photo-MTE effects correlate well to the generated Lorentz force. These results provide a unique tool to program carrier transport in thin-film via external magnetic stimuli with a temperature gradient.

Original languageEnglish
Article number2105297
JournalAdvanced Functional Materials
Volume31
Issue number45
DOIs
Publication statusPublished - 2021 Nov 3

Bibliographical note

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • General Chemistry
  • General Materials Science
  • Electrochemistry
  • Biomaterials

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