Journal
ADVANCED ELECTRONIC MATERIALS
Volume 4, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/aelm.201700496
Keywords
free-standing PEDOT:PSS film; output power density; p-type; thermoelectric generators
Funding
- Vinnova Marie Curie incoming project [2016-04112]
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [200900971]
- Recruitment Program of Global Youth Experts
- National Natural Science Foundation of China [21474035]
- United States National Science Foundation [DMR-1262261]
- Open Fund of the State Key Laboratory of Luminescent Materials and Devices [2016-skllmd-03]
- European Research Council [ERC 307596]
- Division Of Materials Research [1262261] Funding Source: National Science Foundation
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A 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.
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