Universal Scaling of the Charge Transport in Large-Area Molecular Junctions

✍ Scribed by Auke J. Kronemeijer; Ilias Katsouras; Eek H. Huisman; Paul A. van Hal; Tom C. T. Geuns; Paul W. M. Blom; Dago M. de Leeuw

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 674 KB
• Volume: 7
• Category: Article
• ISSN: 1613-6810
• DOI: 10.1002/smll.201100155

✦ Synopsis

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.