Universal scaling of the charge transport in large-area molecular junctions

Small. 2011 Jun 6;7(11):1593-8. doi: 10.1002/smll.201100155. Epub 2011 Apr 28.

Abstract

Charge transport through alkanes and para-phenylene oligomers is investigated in large-area molecular junctions. The molecules are self-assembled in a monolayer and contacted with a top electrode consisting of poly(3,4-ethylenedioxythiophene)-poly(4-styrenesulfonic acid) (PEDOT:PSS). The complete set of J(V,T) characteristics of both saturated and π-conjugated molecules can be described quantitatively by a single equation with only two fit parameters. The derived parameters, in combination with a variation of the bulk conductivity of PEDOT:PSS, demonstrate that the absolute junction resistance is factorized with that of PEDOT:PSS.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alkanes / chemistry
  • Bridged Bicyclo Compounds, Heterocyclic / chemistry*
  • Electric Conductivity*
  • Electrons*
  • Polymers / chemistry*
  • Sulfhydryl Compounds / chemistry
  • Sulfonic Acids / chemistry*
  • Temperature

Substances

  • Alkanes
  • Bridged Bicyclo Compounds, Heterocyclic
  • Polymers
  • Sulfhydryl Compounds
  • Sulfonic Acids
  • poly(3,4-ethylene dioxythiophene)
  • docosane
  • styrenesulfonic acid polymer