Photoinduced Bipolaron Bands and Vibrational Modes in Poly(isothianaphtene)

  • J. Poplawski
  • E. Ehrenfreund
  • T. Danno
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 107)


Photoinduced absorption studies of poly(isothianaphtene) (PITN) in an extended spectral range, including electronic bands as well as vibrational modes, are presented for the first time. The narrow bandgap conjugated polymer PITN, which is derived from polythiophene by fusing a benzene ring to the thiophene ring in the monomer, exhibits photoinduced absorption spectra which are characteristic of the polythiophene (PT) family (e.g. PT and poly(3-methylthiophene), P3MT). Namely, the photoinduced absorption spectrum is composed of infrared active vibration (IRAV) absorption bands typical of charged defects in conjugated polymers, and two well defined midgap electronic absorption bands, at 0.33 and 0.68 eV. Similar to the case of the polymers PT and P3MT, we tentatively assign the photoinduced absorption bands to bipolarons.


Poly Thiophene Thiophene Ring Charged Defect Synthetic Metal Photoexcited Carrier 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • J. Poplawski
    • 1
  • E. Ehrenfreund
    • 1
  • T. Danno
    • 2
  1. 1.Department of Physics and Solid State InstituteTechnion-Israel Institute of TechnologyHaifaIsrael
  2. 2.Ludwig Boltzmann Institut für FestkörperphysikUniversität WienWienAustria

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