Transition from dynamic to static disorder in one-dimensional organic semiconductors

Alessandro Troisi, David Cheung

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

A generic model Hamiltonian is proposed for the study of the transport in a quasi-one-dimensional semiconductor in the charge transport regime intermediate between dynamic localization and static localization due to structural disorder. This intermediate regime may be appropriate for many organic semiconductors, including polymers, discotic liquid crystals, and DNA. The dynamics of the charge carrier is coupled to classical Langevin oscillators whose spectral density can be adjusted to model experimental systems of interest. In the proposed model, the density of states is constant (at constant temperature) and the transition from dynamic to static disorder is controlled by a single parameter. This paper further clarifies that the density of states may not contain all the information needed to describe the charge transport in some materials.
Original languageEnglish
Article number014703
Number of pages8
JournalJournal of Chemical Physics
Volume131
Issue number1
Early online date6 Jul 2009
DOIs
Publication statusPublished - 7 Jul 2009

Keywords

  • electronic density of states
  • one dimensional conductivity
  • organic semiconductors
  • polymers

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