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Significant conductivity enhancement of PEDOT:PSS films treated with lithium salt solutions

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Abstract

An effective method to significantly enhance the electrical conductivity of PEDOT:PSS films through a treatment with various aqueous solutions of lithium salts such as LiClO4, Li2SO4 and LiNO3 etc., is presented in this paper. The maximum electrical conductivity of PEDOT:PSS film treated with LiClO4 could be up to 522 S cm−1, which was enhanced by a factor of 2,610 compared to that of pure PEDOT:PSS film (0.2 S cm−1). The FTIR spectra characterization was performed and suggested that the chemical structure of PEDOT:PSS didn’t change after the treatment. Remarkable improvement in carrier mobility was a key reason for the increase in the electrical conductivity. The highest carrier mobility of the PEDOT:PSS film by LiClO4 treatment could reach 3.8 cm2/Vs, approximately 15 times higher than that of pure PEDOT:PSS film with a value of 0.25 cm2/Vs.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (51203070 & 51303073), Jiangxi Provincial Department of Education (GJJ13565) and Jiangxi Provincial Department of Science and Technology (20142BAB216032).

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Authors and Affiliations

  1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, China

    Zhengyou Zhu, Haijun Song, Jingkun Xu, Congcong Liu, Qinglin Jiang & Hui Shi

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  1. Zhengyou Zhu
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  2. Haijun Song
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  3. Jingkun Xu
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  4. Congcong Liu
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  5. Qinglin Jiang
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Correspondence to Jingkun Xu or Congcong Liu.

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Zhu, Z., Song, H., Xu, J. et al. Significant conductivity enhancement of PEDOT:PSS films treated with lithium salt solutions. J Mater Sci: Mater Electron 26, 429–434 (2015). https://doi.org/10.1007/s10854-014-2417-x

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  • DOI: https://doi.org/10.1007/s10854-014-2417-x

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