Enhanced Thermoelectric Power Factor of Tensile Drawn Poly(3-hexylthiophene)
Journal article, 2019

© 2018 American Chemical Society. The thermoelectric power factor of a broad range of organic semiconductors scales with their electrical conductivity according to a widely obeyed power law, and therefore, strategies that permit this empirical trend to be surpassed are highly sought after. Here, tensile drawing of the conjugated polymer poly(3-hexylthiophene) (P3HT) is employed to create free-standing films with a high degree of uniaxial alignment. Along the direction of orientation, sequential doping with a molybdenum tris(dithiolene) complex leads to a 5-fold enhancement of the power factor beyond the predicted value, reaching up to 16 μW m-1 K-2 for a conductivity of about 13 S cm-1. Neither stretching nor doping affect the glass transition temperature of P3HT, giving rise to robust free-standing materials that are of interest for the design of flexible thermoelectric devices.

Author

Jonna Hynynen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Christian Müller Group

Emmy Järsvall

Renee Kroon

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Christian Müller Group

Yadong Zhang

Georgia Institute of Technology

Stephen Barlow

Georgia Institute of Technology

Seth R. Marder

Georgia Institute of Technology

M. Kemerink

Linköping University

Anja Lund

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Christian Müller Group

Christian Müller

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Christian Müller Group

ACS Macro Letters

2161-1653 (eISSN)

Vol. 8 1 70-76

Subject Categories

Textile, Rubber and Polymeric Materials

Materials Chemistry

Condensed Matter Physics

DOI

10.1021/acsmacrolett.8b00820

More information

Latest update

2/18/2019