Charge transport and contact resistance in coplanar devices based on colloidal polyaniline dispersion

Appan Merari Masillamani, Nikola Peřinka, Milena Hajná, Jaroslav Stejskal, Denis Tondelier, Yvan Bonnassieux, Jean Charles Vanel, Bernard Geffroy, Denis Mencaraglia

Research output: Contribution to journalArticlepeer-review

Abstract

The charge transport properties of thin films prepared from colloidal dispersion of polyaniline stabilized by poly(N-vinylpyrrolidone) (PANI/PVP) have been investigated. The electrical characterization of coplanar device comprising of gold electrodes and PANI/PVP film deposited by spin coating served to gain insights into the contact and bulk resistance. The films prepared from PANI/PVP colloidal dispersion show high stability over a large temperature range. Temperature dependent measurements in the range from 90 to 350 K reveal that the charge transport can be described by a three-dimensional variable-range hopping mechanism as the dominant mode in the films. The stability of the films cast from dispersion within a large temperature range opens the possibility of the application as a polymer semiconductor layer in sensors and charge-transport interlayer in organic solar cells.

Original languageEnglish
Pages (from-to)1710-1716
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume54
Issue number17
DOIs
Publication statusPublished - 1 Sept 2016

Keywords

  • charge transport
  • colloidal dispersion
  • colloids
  • conductivity
  • conjugated polymers
  • polyaniline
  • thin films
  • thin layers

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