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Enhanced thermoelectric performance of poly(3,4‐ethylenedioxythiophene):poly(4‐styrenesulfonate) (PEDOT:PSS) with long‐term humidity stability via sequential treatment with trifluoroacetic acid
Author(s) -
Yemata Temesgen Atnafu,
Kyaw Aung Ko Ko,
Zheng Yun,
Wang Xizu,
Zhu Qiang,
Chin Wee Shong,
Xu Jianwei
Publication year - 2020
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5921
Subject(s) - pedot:pss , trifluoroacetic acid , seebeck coefficient , thermoelectric effect , materials science , poly(3,4 ethylenedioxythiophene) , electrical resistivity and conductivity , styrene , conductive polymer , thermoelectric materials , chemical engineering , sulfonate , polymer chemistry , thermal conductivity , composite material , polymer , organic chemistry , chemistry , copolymer , electrical engineering , thermodynamics , physics , engineering , sodium , metallurgy
This paper reports a range of effective sequential chemical processes to enhance the thermoelectric performance of conducting poly(3,4‐ethylenedioxythiophene) films doped with poly(styrene sulfonate) anions (PEDOT:PSS). The electrical conductivity of the PEDOT:PSS films was significantly increased from 0.33 to 3748 S cm −1 after a series of sequential treatments with trifluoroacetic acid (TFA) while the Seebeck coefficient and thermal conductivity were slightly reduced from 17.5 ± 1.2 to 16.0 ± 1.1 μV K −1 and 0.537 to 0.415 W m –1 K −1 for the pristine film and treated film, respectively, leading to a significant improvement in power factor up to 97.1 ± 5.4 μW m –1 K −2 . More importantly, around 80% of the electrical conductivity and Seebeck coefficient was retained after 20 days for these TFA‐treated PEDOT:PSS films, revealing the potential for real thermoelectric applications. © 2019 Society of Chemical Industry