A Free-Standing High-Output Power Density Thermoelectric Device Based on Structure-Ordered PEDOT:PSS
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AbstractA free-standing high-output power density polymeric thermoelectric (TE) device is realized based on a highly conductive (approximate to 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 mu V K-1, an in-plane thermal conductivity of 0.64 W m(-1) K-1, and a peak power factor of 107 mu W 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 mu W 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 degrees 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.
All Author(s) ListLi ZF, Sun HD, Hsiao CL, Yao YL, Xiao YQ, Shahi M, Jin YZ, Cruce A, Liu XJ, Jiang YY, Meng W, Qin F, Ederth T, Fabiano S, Chen WMM, Lu XH, Birch J, Brill JW, Zhou YH, Crispin X, Zhang FL
Journal nameAdvanced Electronic Materials
Volume Number4
Issue Number2
Article number1700496
LanguagesEnglish-United Kingdom
Keywordsfree-standing PEDOT:PSS film,output power density,p-type,thermoelectric generators
Web of Science Subject CategoriesNanoscience & Nanotechnology;Materials Science, Multidisciplinary;Physics, Applied;Science & Technology - Other Topics;Materials Science;Physics

Last updated on 2020-27-03 at 04:17