High-Performance PEDOT: PSS Flexible Thermoelectric Materials and Their Devices by Triple Post-Treatments
Article
Article Title | High-Performance PEDOT: PSS Flexible Thermoelectric Materials and Their Devices by Triple Post-Treatments |
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ERA Journal ID | 1423 |
Article Category | Article |
Authors | Xu, Shengduo (Author), Hong, Min (Author), Shi, Xiao-Lei (Author), Wang, Yuan (Author), Ge, Lei (Author), Bai, Yang (Author), Wang, Lianzhou (Author), Dargusch, Matthew (Author), Zou, Jin (Author) and Chen, Zhi-Gang (Author) |
Journal Title | Chemisty of Materials |
Chemistry of Materials | |
Journal Citation | 31 (14), pp. 5238-5244 |
Number of Pages | 7 |
Year | 2019 |
Place of Publication | United States |
ISSN | 0897-4756 |
1520-5002 | |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acs.chemmater.9b01500 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acs.chemmater.9b01500 |
Abstract | Searching an effective method to enhance the thermoelectric properties of flexible organic films can significantly widen the application of flexible thermoelectric devices. Tuning the microstacking structure and oxidation level can effectively optimize the thermoelectric properties of poly(3,4 ethylenedioxithiophene):poly(styrenesulfonate)(PEDOT:PSS) organic films. Here, we adopt triple post-treatments with formamide (CH3NO), concentrated sulfuric acid (H2SO4), and sodium borohydride in sequence to engineer flexible PEDOT:PSS thermoelectric films. A high power factor of 141 μWm−1 K−2 at 25 °C has been obtained for the PEDOT:PSS film. Such a high power factor stems from the high σ (1786 Scm−1) and S (28.1 μVK−1) after posttreatment with CH3NO, H2SO4, and NaBH4 in order. The increased carrier mobility resulting from both the selective removal of excess insulating PSS within the films and the conformation transition after CH3NO and H2SO4 treatments is responsible for the enhancement of σ, while the subsequent NaBH4 treatment optimize the electrical properties (σ and S) by modulating the oxidation level. A homemade thermoelectric device has also been fabricated using the as-prepared flexible PEDOT:PSS films and had a high output power density of ∼1 μWcm−2 with human arm as a heating source. This study indicates that flexible thermoelectric devices based on cheap conducting polymers have great potential in wearable electronics. |
Keywords | Physical and chemical processes; Plastics; Power; Conjugated polymers; Polymers |
ANZSRC Field of Research 2020 | 340399. Macromolecular and materials chemistry not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Queensland |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5595/high-performance-pedot-pss-flexible-thermoelectric-materials-and-their-devices-by-triple-post-treatments
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