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Unusual Dielectric Properties of Electrochromic Polydipyridinium Triflate Composites with Carbon Nanotubes

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Abstract

The dielectric properties of electrochromic composite material based on poly[4,4’-(1,4-phenylene)bis(2,6-diphenylpyridinium)triflate] (PV) and multi-wall carbon nanotubes (MWCNTs) have been studied. Negative permittivity was registered at low frequencies of the alternating electric field (\(10^{-1}{-}10^{3}\) Hz) in the PV/MWCNT nanocomposites of different composition. The frequency of transition from negative to positive permittivity, as well as the values of conductivity, increased in the case of application of direct-current (dc) voltage. The physical mechanism responsible for the unusual properties appears to be related to the delocalized charges located at the multiple insulator–conductor interfaces.

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Funding

This work was supported by the Russian Foundation for Basic Research, project no. 18-03-01019a.

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Authors and Affiliations

  1. Department of Physics, Moscow State University, 119991, Moscow, Russia

    I. A. Malyshkina, E. E. Makhaeva & R. D. Pichugov

Authors
  1. I. A. Malyshkina
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  2. E. E. Makhaeva
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  3. R. D. Pichugov
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Corresponding author

Correspondence to I. A. Malyshkina.

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Translated by E. Smirnova

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Malyshkina, I.A., Makhaeva, E.E. & Pichugov, R.D. Unusual Dielectric Properties of Electrochromic Polydipyridinium Triflate Composites with Carbon Nanotubes. Moscow Univ. Phys. 75, 153–157 (2020). https://doi.org/10.3103/S0027134920020071

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  • DOI: https://doi.org/10.3103/S0027134920020071

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