Optical characterization of pristine poly(3-hexyl thiophene) films

Anthony J. Morfa, Teresa M. Barnes, Andrew J. Ferguson, Dean H. Levi, Garry Rumbles, Kathy L. Rowlen, Jao Van De Lagemaat

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


We describe a comprehensive model for the optical properties of pristine films of poly-(3-hexylthiophene) (P3HT). The presented model is anisotropic with the optical axis normal to the substrate plane, which is consistent with previous x-ray diffraction studies that show preferential edge-on packing of the polymer chains on the substrate. Peak locations and spacings are defined using a Huang-Rhys vibronic progression consistent with known phonon energies. We demonstrate that the model fits variable-angle spectroscopic ellipsometry and normal-incidence transmission data well, and accurately predicts angle- and polarization-dependent transmission and reflection data. The spectral features of the optical constants used in the model are in excellent agreement with published spectroscopic data on P3HT.

Original languageEnglish
Pages (from-to)186-194
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Issue number3
Publication statusPublished - Feb 1 2011


  • conducting polymers
  • conjugated polymers
  • dielectric properties
  • flexible electronics
  • modeling
  • optics
  • organic electronics
  • photophysics
  • polyaromatics
  • refractive index
  • solar cells

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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