Doping-induced realignment of molecular levels at organic-organic heterojunctions

Antoine Kahn, Wei Zhao, Weiying Gao, Hector Vázquez, Fernando Flores

Research output: Contribution to journalArticle

80 Scopus citations

Abstract

This article examines how the concept of alignment of charge neutrality levels (CNL) can be used to explain and predict interface dipole and molecular level offset at organic-organic (OO) heterojunctions. The application of the model of CNL alignment to interfaces between undoped materials is reviewed first. The model is then extended to explain the shift of the CNL upon electrical doping of an organic material, and the resulting change in interface dipole and molecular level alignment. This approach provides, at this point, the first comprehensive prediction of energetics at OO heterojunctions.

Original languageEnglish (US)
Pages (from-to)129-137
Number of pages9
JournalChemical Physics
Volume325
Issue number1
DOIs
StatePublished - Jun 9 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Keywords

  • Charge neutrality level
  • Heterojunctions
  • Molecular level alignment
  • Organic semiconductors

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