Impact of Oligoether Side-Chain Length on the Thermoelectric Properties of a Polar Polythiophene
Reviewartikel, 2024

Conjugated polymers with oligoether side chains make up a promising class of thermoelectric materials. In this work, the impact of the side-chain length on the thermoelectric and mechanical properties of polythiophenes is investigated. Polymers with tri-, tetra-, or hexaethylene glycol side chains are compared, and the shortest length is found to result in thin films with the highest degree of order upon doping with the p-dopant 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F(4)TCNQ). As a result, a stiff material with an electrical conductivity of up to 830 +/- 15 S cm(-1) is obtained, resulting in a thermoelectric power factor of about 21 mu W m(-1) K-2 in the case of as-cast films. Aging at ambient conditions results in an initial decrease in thermoelectric properties but then yields a highly stable performance for at least 3 months, with values of about 200 S cm(-1) and 5 mu W m(-1) K-2. Evidently, identification of the optimal side-chain length is an important criterion for the design of conjugated polymers for organic thermoelectrics.

conjugated polymer

chemical doping

organicthermoelectrics

side-chain length

electrical conductivity

Författare

Mariavittoria Craighero

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Jiali Guo

Consejo Superior de Investigaciones Científicas (CSIC)

Sepideh Zokaei

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Sophie Griggs

University of Oxford

Junfu Tian

University of Oxford

Jesika Asatryan

Universidade da Coruña

Joost Kimpel

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Renee Kroon

Linköpings universitet

Kai Xu

Consejo Superior de Investigaciones Científicas (CSIC)

Juan Sebastian Reparaz

Consejo Superior de Investigaciones Científicas (CSIC)

Jaime Martin

POLYMAT

Universidade da Coruña

Iain Mcculloch

University of Oxford

Mariano Campoy-Quiles

Consejo Superior de Investigaciones Científicas (CSIC)

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi

ACS Applied Electronic Materials

26376113 (eISSN)

Vol. 6 5 2909-2916

Hybrid and Organic Thermoelectric Systems (HORATES)

Europeiska kommissionen (EU) (EC/H2020/955837), 2021-03-01 -- 2025-02-28.

Ämneskategorier

Polymerkemi

Oorganisk kemi

Annan materialteknik

DOI

10.1021/acsaelm.3c00936

Mer information

Senast uppdaterat

2024-06-18