Charge transport in self-assembled semiconducting organic layers

role of dynamic and static disorder

Thorsten Vehoff, Yeon Sook Chung, Karen Johnston, Alessandro Troisi, Do Y. Yoon, Denis Andrienko

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Partial disorder is an inherent property of self-assembled organic semiconductors that complicates their rational design, because electronic structure, self-assembling properties, and stability all have to be accounted for simultaneously. Therefore, the understanding of charge transport mechanisms in these systems is still in its infancy. A theoretical study of charge transport in organic semiconductors was performed on self-assembled layers of [1]benzothieno[3,2-b]benzothiophene functionalized with alkyl side chains. Analysis showed that semiclassical dynamics misses static (on time scales of charge transport) disorder while the solution of the master equation combined with the high-temperature limit Marcus theory for charge transfer rates does not take into account molecular dynamic modes relaxing on a time scale of charge hopping. A comparison between predictions based on a perfectly ordered and a realistic crystal structure reveals the strong influence of static and dynamic disorder. The advantage of two-dimensional charge transporting materials over one-dimensional ones is clearly shown. The Marcus theory-based prediction of 0.1 cm(2) V(-1) s(-1) is in good agreement with our FET mobility of 0.22 cm(2) V(-1) s(-1), which is an order of magnitude lower than that reported in the literature [Ebata, H.; et al. J. Ant. Chem. Soc. 2007, 129, 15732].

Original languageEnglish
Pages (from-to)10592-10597
Number of pages6
JournalJournal of Physical Chemistry C
Volume114
Issue number23
DOIs
Publication statusPublished - 17 Jun 2010

Fingerprint

Charge transfer
organic semiconductors
disorders
Semiconducting organic compounds
assembling
predictions
field effect transistors
Field effect transistors
charge transfer
molecular dynamics
electronic structure
Electronic structure
Molecular dynamics
crystal structure
Crystal structure
Temperature

Keywords

  • band-structure
  • molecular-crystals
  • perylene tetracarboxdiimides
  • mobility
  • derivatives
  • field-effect transistors
  • electronic transport
  • pentacene
  • morphology
  • high-performance

Cite this

Vehoff, Thorsten ; Chung, Yeon Sook ; Johnston, Karen ; Troisi, Alessandro ; Yoon, Do Y. ; Andrienko, Denis. / Charge transport in self-assembled semiconducting organic layers : role of dynamic and static disorder. In: Journal of Physical Chemistry C. 2010 ; Vol. 114, No. 23. pp. 10592-10597.
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Charge transport in self-assembled semiconducting organic layers : role of dynamic and static disorder. / Vehoff, Thorsten; Chung, Yeon Sook; Johnston, Karen; Troisi, Alessandro; Yoon, Do Y.; Andrienko, Denis.

In: Journal of Physical Chemistry C, Vol. 114, No. 23, 17.06.2010, p. 10592-10597.

Research output: Contribution to journalArticle

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AU - Andrienko, Denis

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