The chemical and electronic structure of the interface between aluminum and conjugated polymers or molecules

P. Dannetun*, M. Lögdlund, M. Fahlman, M. Boman, S. Stafström, W. R. Salaneck, R. Lazzaroni, C. Fredriksson, Jean-Luc Bredas, S. Graham, R. H. Friend, A. B. Holmes, R. Zamboni, C. Taliani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

The interaction between aluminum and α-ω-diphenyltetradecaheptaenee (DP7), α-sexithienyl (6T), and poly(p-phenylenevinylene) (PPV), respectively have been studied using both X-ray Photoelectron Spectroscopy (XPS) and Ultraviolet Photoelectron Spectroscopy (UPS). The UPS valence band spectra, are interpreted with the help of quantum chemical calculations based upon Modified Neglect of Diatomic Overlap (MNDO), Valence Effective Hamitonian (VEH) and ab initio Hartree-Fock methods. DP7 is a model molecule for polyacetylene, while 6T is a model molecule (an oligomer) of polythiophene. The results indicate that aluminum reacts strongly with the surfaces of all of the materials studied. The π-electronic structure of each material was strongly modified. Furthermore, aluminum reacts preferentially with the polyene partof DP7, with the vinylene part of PPV, and with the α-carbons of the thiophene nits of 6T.

Original languageEnglish (US)
Pages (from-to)212-217
Number of pages6
JournalSynthetic Metals
Volume55
Issue number1
DOIs
StatePublished - Mar 15 1993

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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