High Thermoelectric Power Factor of Poly(3-hexylthiophene) through In-Plane Alignment and Doping with a Molybdenum Dithiolene Complex
Journal article, 2020

We report a record thermoelectric power factor of up to 160 μW m-1 K-2 for the conjugated polymer poly(3-hexylthiophene) (P3HT). This result is achieved through the combination of high-temperature rubbing of thin films together with the use of a large molybdenum dithiolene p-dopant with a high electron affinity. Comparison of the UV-vis-NIR spectra of the chemically doped samples to electrochemically oxidized material reveals an oxidation level of 10%, i.e., one polaron for every 10 repeat units. The high power factor arises due to an increase in the charge-carrier mobility and hence electrical conductivity along the rubbing direction. We conclude that P3HT, with its facile synthesis and outstanding processability, should not be ruled out as a potential thermoelectric material. ©

Author

Viktoriia Untilova

University of Strasbourg

Jonna Hynynen

Chemical Engineering Design

Anna Hofmann

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

Dorothea Scheunemann

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

Yadong Zhang

Georgia Institute of Technology

Stephen Barlow

Georgia Institute of Technology

M. Kemerink

Heidelberg University

Seth R. Marder

Georgia Institute of Technology

Laure Biniek

University of Strasbourg

Christian Müller

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

Martin Brinkmann

University of Strasbourg

Macromolecules

00249297 (ISSN) 15205835 (eISSN)

Vol. 53 15 6314-6321

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Subject Categories

Inorganic Chemistry

Textile, Rubber and Polymeric Materials

Materials Chemistry

DOI

10.1021/acs.macromol.0c01223

More information

Latest update

3/9/2021 7