Chemical and electronic aspects of metal/conjugated polymer interfaces. Implications for electronic devices

R. Lazzaroni*, M. Lögdlund, A. Calderone, Jean-Luc Bredas, P. Dannetun, C. Fauquet, C. Fredriksson, S. Stafström, W. R. Salaneck

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The chemical nature and the electronic structure of metal/conjugated polymer interfaces are investigated in the context of polymer-based light-emitting diodes. We consider the interaction of low-workfunction metals (Al, Ca) with the surface of conjugated polymers or model oligomer molecules with a combined experimental and theoretical approach. The early stages of the interface formation are followed with X-ray and ultraviolet photoelectron spectroscopies and the experimental data are compared to the results of quantum chemical calculations. The reactions of Al and Ca with the organic surface are found to be fundamentally different: while the former forms new covalent bonds onto the polymer backbone, the latter tends to dope the conjugated system. Both types of reaction are expected to modify drastically the electronic properties of the polymer semiconductor.

Original languageEnglish (US)
Pages (from-to)2159-2162
Number of pages4
JournalSynthetic Metals
Volume71
Issue number1-3
DOIs
StatePublished - Apr 1 1995

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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