Raman studies of doped polythiophene and the radical cation and dication of quinquethiophene

Yukio Furukawa, Nami Yokonuma, Mitsuo Tasum, Masami Kuroda, Juzo Nakayama

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Issue number1
Publication statusPublished - 1994 Nov
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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