High thermoelectric performance of spray-coated Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) films enabled by two-step post-treatment process

Yen Ting Lin, Chia Yu Lee, Chih Yao Wu, Jhih Min Lin, Tai Chou Lee, Shih Huang Tung, Cheng Liang Liu

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)

摘要

Herein, poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) films with improved thermoelectric properties are fabricated via spray coating followed by a sequential, two-step post-treatment process with ethylene glycol (EG) and a methylammonium iodide (MAI) solution. The EG treatment greatly increases the electrical conductivity of the PEDOT-PSS film up to 1752.1 S cm−1, with an unchanged Seebeck coefficient of 15–17 μV K−1, while the optimal use of 0.05 M MAI in DMSO/DI water for the second step provides a high power factor of 122.3 μW m−1 K−2, along with an increased conductivity of 2226.8 S cm−1 and Seebeck coefficient of 22.8 μV K−1. Notably, the obtained power factor is among the highest reported for spray-coated polymer-based thermoelectric devices. The performance enhancement is attributed to phase separation of the non-conductive PSS from the PEDOT, the change in chain conformation, the preferential orientation of the PEDOT crystallites, and the manipulation of energy levels. High thermoelectric performance of the as-fabricated PEDOT:PSS on a plastic substrate is established by using a facile proof-of-concept thermoelectric generator to generate a maximum power density of 12.1 nW cm−2. The fabrication approach developed herein provides an essential paradigm for the production of polymer thermoelectric materials with great potential for application in wearable thermoelectric devices.

原文???core.languages.en_GB???
文章編號232516
期刊Journal of Power Sources
556
DOIs
出版狀態已出版 - 1 2月 2023

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