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A Free‐Standing High‐Output Power Density Thermoelectric Device Based on Structure‐Ordered PEDOT:PSS
Author(s) -
Li Zaifang,
Sun Hengda,
Hsiao ChingLien,
Yao Yulong,
Xiao Yiqun,
Shahi Maryam,
Jin Yingzhi,
Cruce Alex,
Liu Xianjie,
Jiang Youyu,
Meng Wei,
Qin Fei,
Ederth Thomas,
Fabiano Simone,
Chen Weimin M.,
Lu Xinhui,
Birch Jens,
Brill Joseph W.,
Zhou Yinhua,
Crispin Xavier,
Zhang Fengling
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201700496
Subject(s) - pedot:pss , materials science , thermoelectric effect , polystyrene sulfonate , seebeck coefficient , optoelectronics , thermal conductivity , thermoelectric materials , power density , thermoelectric generator , composite material , power (physics) , layer (electronics) , thermodynamics , physics
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.