Polaron formation dynamics in conducting polymers

Xiaojing Liu, Kun Gao, Yuan Li, Jiyong Fu, Jianhua Wei, Shijie Xie*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

In the framework of the extended Su-Schrieffer-Heeger model, the formation mechanism of a polaron is studied by calculating the interaction force between a hot electron and the lattice in a conducting polymer. It is found that the formation of a polaron depends upon the energy of the hot electron. Regardless of whether an electron comes from an injection, doping or a dissociated state of a polaron, it will be trapped by the lattice to form a polaron only when its energy is lower than a critical value. The force field between the lattice and the hot electron with a lower energy has a localized characteristic, which causes polaron formation in a conducting polymer. For a hot electron with much higher energy, the force field is extended over the whole polymer chain, which cannot trap the electron and therefore a polaron does not form in this case.

Original languageEnglish (US)
Pages (from-to)380-385
Number of pages6
JournalSynthetic Metals
Volume157
Issue number8-9
DOIs
StatePublished - May 1 2007

Keywords

  • Organic polymer
  • Polaron

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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