Conduction behavior of doped polyaniline films at high current density regime

Hai Sheng Xu, Z. Y. Cheng, Qiming Zhang, Pen Cheng Wang, Alan G. Macdiarmid

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17 Scopus citations


The conduction behavior at high current density at room temperature and above of polyaniline (PANI) films doped with HCl and camphor sulfonic acid (HCSA), respectively, is reported. It is found that the current density deviates strongly from the linear relation with the electric field in high current density region, and a saturation of the current density is observed. The maximum current density Jm seems to be proportional to the conductivity of the sample and hence, for PANI doped with HCl, Jm is about 200 A/cm2, whereas for HCSA doped samples, Jm can reach more than 1,200 A/cm2. The saturation of current density is interpreted as being caused by space charge accumulation at the insulating barrier regions and a dedoping effect in the conduction domains due to the detraping of the ions under high fields.

Original languageEnglish (US)
Pages (from-to)2845-2850
Number of pages6
JournalJournal of Polymer Science, Part B: Polymer Physics
Issue number20
StatePublished - Oct 15 1999

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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