https://scholars.lib.ntu.edu.tw/handle/123456789/632958
標題: | High thermoelectric performance of spray-coated Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) films enabled y two-step post-treatment process | 作者: | YEN-TING LIN Lee, Chia Yu Wu, Chih Yao Lin, Jhih Min Lee, Tai Chou SHIH-HUANG TUNG CHENG-LIANG LIU |
關鍵字: | Doping | PEDOT:PSS | Spray-coating | Thermoelectric | Thermoelectric generator | 公開日期: | 1-二月-2023 | 出版社: | ELSEVIER | 卷: | 556 | 來源出版物: | Journal of Power Sources | 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. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/632958 | ISSN: | 03787753 | DOI: | 10.1016/j.jpowsour.2022.232516 |
顯示於: | 材料科學與工程學系 |
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