Achieving High Thermoelectric Performance and Metallic Transport in Solvent‐Sheared PEDOT:PSS. (27th January 2021)

• Record Type: Journal Article
• Authors: Hinckley, Allison C.; Andrews, Sean C.; Dunham, Marc T.; Sood, Aditya; Barako, Michael T.; Schneider, Sebastian; Toney, Michael F.; Goodson, Kenneth E.; Bao, Zhenan
• Is Part Of: Advanced Electronic Materials. Volume 7:Number 3(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-27
• Subjects: energy harvesting -- organic electronic -- PEDOT -- PEDOT:PSS -- power factor -- thermoelectrics; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.202001190
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Polymer‐based materials hold great potential for use in thermoelectric applications but are limited by their poor electrical properties. Through a combination of solution‐shearing deposition and directionally applied solvent treatments, poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films with metallic‐like conductivities can be obtained with high power factors in excess of 800 µW m −1 K −2 . X‐ray scattering and absorption data indicate that structural alignment of PEDOT chains and larger‐sized domains are responsible for the enhanced electrical conductivity. It is expected that further enhancements to the power factor can be obtained through device geometry and postdeposition solvent shearing optimization. Abstract : New performance benchmarks for the electrical conductivity and power factor of poly(3, 4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) are established for sheared films via postdeposition solvent integration through a shearing motif. X‐ray scattering and absorption measurements indicate that this intrinsically scalable deposition and processing technique increases alignment of PEDOT chains, and the concentration and alignment of PEDOT domains relative to isotropic techniques such as drop‐ and spin‐casting.