The near-infrared Raman and electronic absorption spectra of an as-polymerized BF4˜-doped polythiophene film have been measured and analyzed by referring to the data of the radical cation and dication of a-quinquethiophene, which are models of a positive polaron and a positive bipolaron, respectively. Similarities between the Raman spectrum of doped polythiophene and that of the radical cation suggest that the observed Raman bands of the doped polymer arise from positive polarons. It is shown that the two characteristic bands in the electronic absorption spectrum of the doped polymer are assignable to positive polarons.
|Number of pages||8|
|Journal||Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals|
|Publication status||Published - 1994|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics