Multimorphism in molecular monolayers: Pentacene on Cu(110)

Kathrin Müller, Abdelkader Kara, Timur K. Kim, Rolf Bertschinger, Andreas Scheybal, Jürg Osterwalder, and Thomas A. Jung
Phys. Rev. B 79, 245421 – Published 18 June 2009

Abstract

The architecture of the contacting interface between organic molecular semiconductors and metallic or insulating substrates determines its cooperative properties such as the charge injection and the charge-carrier mobility of organic thin-film devices. This paper contributes a systematic approach to reveal the evolution of the different structural phases of pentacene on Cu(110) while using the same growth conditions. Complementary measurement techniques such as scanning tunneling microscopy and low-energy electron diffraction together with ab initio calculations are applied to reveal the complex multiphase behavior of this system at room temperature. For coverages between 0.2 and 1 monolayer (ML) a complex multiphase behavior comprising five different phases is observed, which is associated to the interplay of molecule/molecule and molecule/substrate interactions. Multimorphism critically depends on the thermodynamics and kinetics determined by the growth parameters as well as the system itself and arises from shallow energy minima for structural rearrangements. In consequence, the multimorphism affects the interface structure and therefore the interface properties.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 21 January 2009

DOI:https://doi.org/10.1103/PhysRevB.79.245421

©2009 American Physical Society

Authors & Affiliations

Kathrin Müller1, Abdelkader Kara2, Timur K. Kim3, Rolf Bertschinger1, Andreas Scheybal1, Jürg Osterwalder4, and Thomas A. Jung1

  • 1Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 2Department of Physics, University of Central Florida, Orlando, Florida 32816, USA
  • 3Leibniz Institute for Solid State Research, IFW-Dresden, D-01171 Dresden, Germany
  • 4Institute of Physics, University of Zürich, CH-8057 Zürich, Switzerland

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 79, Iss. 24 — 15 June 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×