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Ultrafast Laser-induced excellent thermoelectric performance of PEDOT:PSS Films
  • +6
  • Xuewen Wang,
  • Yuzhe Feng,
  • Kaili Sun,
  • Nianyao Chai,
  • Bo Mai,
  • Sheng Li,
  • Xiangyu Chen,
  • Wenyu Zhao,
  • Qingjie Zhang
Xuewen Wang
Wuhan University of Technology

Corresponding Author:xwwang@whut.edu.cn

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Yuzhe Feng
Wuhan University of Technology
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Kaili Sun
Wuhan University of Technology
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Nianyao Chai
Wuhan University of Technology
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Bo Mai
Wuhan University of Technology
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Sheng Li
Wuhan University of Technology
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Xiangyu Chen
Wuhan University of Technology
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Wenyu Zhao
Wuhan University of Technology
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Qingjie Zhang
Wuhan University of Technology
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Abstract

Due to poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) is water-processable, thermally stable and highly conductive, PEDOT:PSS and its composites have been considered to be one of the most promising flexible thermoelectric materials. However, the PEDOT:PSS film prepared from its commercial aqueous dispersion usually has quite low conductivity, thus cannot be directly utilized for thermoelectric applications. Here, a simple environmentally friendly strategy via femtosecond laser irradiation without any chemical dopants and treatments was demonstrated. Under optimal conditions, the electrical conductivity of the treated film is increased to 803.1 S/cm from 1.2 S/cm around three order of magnitude higher, and the power factor is improved to 19.0 μW·m-1·K-2, which is enhanced more than 200 times. The mechanism for such remarkable enhancement was attributed to the transition of the PEDOT chains from a coil to a linear or expanded coil conformation, reduction of the interplanar stacking distance, and the removal of insulating PSS with increasing the oxidation level of PEDOT, facilitating the charge transportation. This work presents an effective route for fabricating high-performance flexible conductive polymer films and wearable thermoelectric devices.
01 Mar 2023Submitted to Energy & Environmental Materials
03 Mar 2023Submission Checks Completed
03 Mar 2023Assigned to Editor
04 Mar 2023Review(s) Completed, Editorial Evaluation Pending
07 Mar 2023Reviewer(s) Assigned
15 Apr 2023Editorial Decision: Revise Major
27 Apr 20231st Revision Received
27 Apr 2023Submission Checks Completed
27 Apr 2023Assigned to Editor
27 Apr 2023Review(s) Completed, Editorial Evaluation Pending
04 May 2023Editorial Decision: Accept