Electronic properties of metal-organic interfaces with application to electroluminescent devices

Aparna Rajagopal, Ian Hill, Antoine Kahn

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The electronic structure of metal-organic molecular semiconductor interfaces is investigated via photoemission spectroscopy. We measured the energy offsets between the organic molecular levels and the metal Fermi level, which correspond to the charge injection barriers. Chemical reaction and interdiffusion dominate the behavior of metal-on-top contacts. Organic-on-top interfaces are found to be more abrupt. The present data demonstrate that the rule of vacuum level alignment breaks down and that the effect of electronic gap states cannot be neglected at these interfaces.

Original languageEnglish (US)
Pages (from-to)245-252
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume322
DOIs
StatePublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Keywords

  • Heterojunctions
  • Interfaces
  • Metal contacts
  • Organic molecular solids

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