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Improved thermoelectric performance of PEDOT:PSS film treated with camphorsulfonic acid

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Abstract

Thermoelectric (TE) properties of free-standing poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT:PSS) films treated with camphorsulfonic acid (CSA) and left hand camphorsulfonic acid (L-CSA) have been systematically investigated utilizing two different methods: addition of CSA/L-CSA into the PEDOT:PSS solution; or post treatment of free-standing PEDOT:PSS films with different concentration of CSA/L-CSA solution. It is verified that the post-treatment method is much more effective than the direct addition of CSA/L-CSA into the PEDOT:PSS solution. Using post-treatment method, the highest electrical conductivity can increase up to 644.7 S/cm, which is much higher than that of the direct addition method, ~206.2 S/cm at room temperature. In both cases, there is trivial change in the Seebeck coefficient. The maximum value of ZT is 0.017 at room temperature for the PEDOT:PSS film post-treated by 0.08 M CSA solution. These results demonstrate that post treatment is a promising approach to enhance the TE properties of PEDOT:PSS thin films. The difference in optical activity between CSA and L-CSA also has an effect on the electrical conductivity of PEDOT:PSS.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51203070 & 51073074) and Jiangxi Provincial Department of Education (GJJ12595 & GJJ11590 & GJJ13565).

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Authors and Affiliations

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

    Haijun Song, Fangfang Kong, Congcong Liu, Jingkun Xu, Qinglin Jiang & Hui Shi

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  1. Haijun Song
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  2. Fangfang Kong
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  3. Congcong Liu
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  4. Jingkun Xu
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  5. Qinglin Jiang
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  6. Hui Shi
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Correspondence to Congcong Liu or Jingkun Xu.

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Song, H., Kong, F., Liu, C. et al. Improved thermoelectric performance of PEDOT:PSS film treated with camphorsulfonic acid. J Polym Res 20, 316 (2013). https://doi.org/10.1007/s10965-013-0316-0

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  • DOI: https://doi.org/10.1007/s10965-013-0316-0

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