Abstract
Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) nanofilms were prepared by a simple spin-coating method. The thermoelectric properties of PEDOT:PSS nanofilms were improved by treatment with different concentrations of oxalic acid at 140°C. The electrical conductivity of PEDOT:PSS nanofilms can be improved from 0.48 to over 800 S cm−1, that is, by a factor of more than 1600 higher than for untreated PEDOT:PSS films. The Seebeck coefficient of the PEDOT:PSS nanofilms decreases slightly and the electrical conductivity increases. The maximum power factor of PEDOT:PSS nanofilms is up to 6.96 μW m−1 K−2. Atomic force microscopy and x-ray photoelectron spectroscopy were conducted to characterize the PEDOT:PSS nanofilms.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (51463008, 51303073, 51203070), the Science and Technology Landing Plan of Universities in Jiangxi province (KJLD 12081), the Jiangxi Provincial Department of Education (YC2013-S270, GJJ13565), the Jiangxi Provincial Department of Science and Technology (20142BAB216032), and the Science and Technology Project of Jiangxi Science and Technology Normal University (2013XJYB001).
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Congcong Liu and Hui Shi contributed equally to this work.
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Liu, C., Shi, H., Xu, J. et al. Improved Thermoelectric Properties of PEDOT:PSS Nanofilms Treated with Oxalic Acid. J. Electron. Mater. 44, 1791–1795 (2015). https://doi.org/10.1007/s11664-014-3557-8
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DOI: https://doi.org/10.1007/s11664-014-3557-8