A Free-Standing High-Output Power Density Thermoelectric Device Based on Structure-Ordered PEDOT:PSS

Zaifang Li, Hengda Sun, Ching Lien Hsiao, Yulong Yao, Yiqun Xiao, Maryam Shahi, Yingzhi Jin, Alex Cruce, Xianjie Liu, Youyu Jiang, Wei Meng, Fei Qin, Thomas Ederth, Simone Fabiano, Weimin M. Chen, Xinhui Lu, Jens Birch, Joseph W. Brill, Yinhua Zhou, Xavier CrispinFengling Zhang

Research output: Contribution to journalArticlepeer-review

75 Scopus citations

Abstract

A free-standing high-output power density polymeric thermoelectric (TE) device is realized based on a highly conductive (≈2500 S cm−1) structure-ordered poly(3,4-ethylenedioxythiophene):polystyrene sulfonate film (denoted as FS-PEDOT:PSS) with a Seebeck coefficient of 20.6 µV K−1, an in-plane thermal conductivity of 0.64 W m−1 K−1, and a peak power factor of 107 µW K−2 m−1 at room temperature. Under a small temperature gradient of 29 K, the TE device demonstrates a maximum output power density of 99 ± 18.7 µW cm−2, which is the highest value achieved in pristine PEDOT:PSS based TE devices. In addition, a fivefold output power is demonstrated by series connecting five devices into a flexible thermoelectric module. The simplicity of assembling the films into flexible thermoelectric modules, the low out-of-plane thermal conductivity of 0.27 W m−1 K−1, and free-standing feature indicates the potential to integrate the FS-PEDOT:PSS TE modules with textiles to power wearable electronics by harvesting human body's heat. In addition to the high power factor, the high thermal stability of the FS-PEDOT:PSS films up to 250 °C is confirmed by in situ temperature-dependent X-ray diffraction and grazing incident wide angle X-ray scattering, which makes the FS-PEDOT:PSS films promising candidates for thermoelectric applications.

Original languageEnglish
Article number1700496
JournalAdvanced Electronic Materials
Volume4
Issue number2
DOIs
StatePublished - Feb 2018

Bibliographical note

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • free-standing PEDOT:PSS film
  • output power density
  • p-type
  • thermoelectric generators

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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