UV photocurrent spectroscopy in poly(p-phenylene vinylene) and derivatives

A. Köhler*, D. A. Dos Santos, D. Beljonne, Z. Shuai, Jean-Luc Bredas, R. H. Friend, S. C. Moratti, A. B. Holmes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We present photocurrent measurements of poly(p-phenylene vinylene) (PPV) and derivatives for photon energies up to 5.0 eV. We observe photocurrent peaks related to the first, second and third absorption peaks, which we associate with the dissociation of a succession of increasingly energetic excitons. We have performed INDO/SCI calculations for the five-ring PPV oligomer, which show different distributions of the electronic charge of the exciton wavefunction over the chain at different excitation energies. We discuss the significance of these states for the photoconduction in PPV and question the applicability of a band-based model.

Original languageEnglish (US)
Pages (from-to)675-676
Number of pages2
JournalSynthetic Metals
Volume84
Issue number1-3
StatePublished - Jan 1 1997

Keywords

  • Photoconductivity
  • Poly(phenylene vinylene) and derivatives
  • Semi-empirical models and model calculations

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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