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Solving the Interdependence Between Electrical Conductivity and Seebeck Coefficient: A Case Study of PEDOT:PSS
Yannan Lu1,2, Sheik Md Kazi Nazrul Islam1, Al Jumlat Ahmed1
1Manufacturing Research Unit, CSIRO, Research Way, Victoria, Clayton, 0810, Australia.
Chemistry, an Asian Journal
|April 28, 2025
Summary
Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) (PEDOT:PSS) shows promise for flexible thermoelectric generators. This review explores strategies to improve thermoelectric performance by understanding structure-property relationships and optimizing conductivity and Seebeck coefficient.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Polymer Science
Background:
- Poly(3,4-ethylenedioxythiophene):polystyrene sulfonate) (PEDOT:PSS) is a biocompatible thermoelectric material with potential for flexible electronics.
- Current thermoelectric performance is limited by parameter trade-offs and insufficient understanding of structure-property relationships.
- Applications in wearable devices, IoT, and biomedical sensors require enhanced thermoelectric efficiency.
Purpose of the Study:
- To review structure-physical property relationships in PEDOT:PSS.
- To introduce strategies for decoupling electrical conductivity and Seebeck coefficient.
- To provide insights into processing and post-treatment effects on thermoelectric properties.
Main Methods:
- Review of existing literature on PEDOT:PSS.
- Analysis of strategies including thermal treatment, doping optimization, hybridization, and crystal engineering.
- Discussion of secondary and tertiary structure influences on Seebeck coefficient.
Main Results:
- Various strategies can improve PEDOT:PSS thermoelectric performance by optimizing conductivity and Seebeck coefficient.
- Understanding molecular structure is key to enhancing thermoelectric properties.
- Processing and post-treatment significantly influence charge transport and thermoelectric output.
Conclusions:
- Further research into secondary and tertiary structures is needed to fully optimize PEDOT:PSS.
- Decoupling conductivity and Seebeck coefficient is achievable through advanced processing.
- PEDOT:PSS holds significant potential for commercial thermoelectric applications.
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