Sequential doping of solid chunks of a conjugated polymer for body-heat-powered thermoelectric modules
Artikel i vetenskaplig tidskrift, 2021

Sequential doping of 1 mm3 sized cubes of regio-regular poly(3-hexylthiophene) (P3HT) with 2,3,5,6-tetrafluoro-tetracyanoquinodimethane is found to result in a doping gradient. The dopant ingresses into the solid material and after two weeks of sequential doping yields a 250 μm thick doped surface layer, while the interior of the cubes remains undoped. The doping gradient is mapped with energy dispersive x-ray spectroscopy (EDX), which is used to estimate a diffusion coefficient of 1 × 10-10 cm2 s-1 at room temperature. The cubes, prepared by pressing at 150 °C, feature alignment of polymer chains along the flow direction, which yields an electrical conductivity of 2.2 S cm-1 in the same direction. A 4-leg thermoelectric module was fabricated with slabs of pressed and doped P3HT, which generated a power of 0.22 μW for a temperature gradient of 10.2 °C generated by body heat.

Författare

Liyang Yu

Sichuan University

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Dorothea Scheunemann

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Anja Lund

Chalmers, Kemi och kemiteknik, Tillämpad kemi

David Kiefer

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 119 18 181902

Hybrid Thermoelectrics: From Model to Device (HyThermEl)

Europeiska kommissionen (EU) (EC/H2020/799477), 2020-02-01 -- 2021-01-14.

Ämneskategorier

Keramteknik

Materialkemi

Den kondenserade materiens fysik

DOI

10.1063/5.0075789

Mer information

Senast uppdaterat

2021-11-24