Facile fabrication of highly flexible,porous PEDOT: PSS/SWCNTs films for thermoelectric applications |
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| Authors: | Fu-Wei Liu Fei Zhong Shi-Chao Wang Wen-He Xie Xue Chen Ya-Ge Hu Yu-Ying Ge Yuan Gao Lei Wang Zi-Qi Liang |
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| Affiliation: | 1.College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China;2.Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China;3.Department of Materials Science, Fudan University, Shanghai 200433, China |
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| Abstract: | High-performance organic composite thermoelectric (TE) materials are considered as a promising alternative for harvesting heat energy. Herein, composite films of poly (3,4-ethyienedioxythiophene):poly(styrene sulfonate)/single-walled carbon nanotubes (PEDOT:PSS/SWCNTs) were fabricated by utilizing a convenient solution mixing method. Thereafter, the as-prepared hybrid films were treated using sulfuric acid (H2SO4) to further optimize the TE performance. Film morphological studies revealed that the sulfuric acid treated PEDOT:PSS/SWCNTs composite samples all possessed porous structures. Due to the successful fabrication of highly conductive networks, the porous nano-architecture also exhibited much more excellent TE properties when compared with the dense structure of the pristine samples. For the post-treated sample, a high power factor of 156.43 μW· m-1· K-2 can be achieved by adjusting the content of CNTs, which is approximately 3 orders of magnitude higher than that of the corresponding untreated samples (0.23 μW· m-1· K-2). Besides, the obtained films also showed excellent mechanical flexibility, owing to the porous nanostructure and the strong π-π interactions between the two components. This work indicates that the H2SO4 treatment could be a promising strategy for fabricating highly-flexible and porous PEDOT:PSS/SWCNTs films with high TE performances. |
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| Keywords: | porous film thermoelectric properties flexibility |
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