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

Alessandro Troisi, David Cheung

Research output: Contribution to journalArticle

32 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.
LanguageEnglish
Article number014703
Number of pages8
JournalJournal of Chemical Physics
Volume131
Issue number1
Early online date6 Jul 2009
DOIs
Publication statusPublished - 7 Jul 2009

Fingerprint

Semiconducting organic compounds
organic semiconductors
disorders
Charge transfer
Hamiltonians
Spectral density
Charge carriers
charge carriers
deoxyribonucleic acid
liquid crystals
oscillators
Semiconductor materials
DNA
polymers
Temperature
temperature

Keywords

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

Cite this

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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.",
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Transition from dynamic to static disorder in one-dimensional organic semiconductors. / Troisi, Alessandro; Cheung, David.

In: Journal of Chemical Physics , Vol. 131, No. 1, 014703, 07.07.2009.

Research output: Contribution to journalArticle

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AU - Troisi, Alessandro

AU - Cheung, David

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KW - electronic density of states

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KW - polymers

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