Photogeneration of polarons in sexithiophene oligomers

J. Poplawski*, E. Ehrenfreund, J. Cornil, Jean-Luc Bredas, R. Pugh, M. Ibrahim, A. J. Frank

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We present studies of neutral films of sexithiophene (6T) using the photoinduced absorption spectroscopy technique. We find two strong absorption bands very similar in energy (0.80 and 1.54 eV) and shape (both feature shoulders) to those found for the radical cation 6T*+. In addition, there is a weak band (at 1.1 eV) similar in energy to that of the dication related band (1.2 eV for 6T++). Measurements of the modulation frequency and temperature dependence of the photogenerated defects show that the main long lived nonlinear excitations are polarons (radical cations.).

Original languageEnglish (US)
Pages (from-to)401-402
Number of pages2
JournalSynthetic Metals
Volume69
Issue number1-3
DOIs
StatePublished - Mar 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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