Raman studies of polarons and bipolarons in sodium-doped poly-p-phenylene

Y. Furukawa, H. Ohtsuka, M. Tasumi

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Raman spectra have been measured of heavily Na-doped poly-p-phenylene (PPP) with various laser lines in the 488.0-1064 nm region. They have been compared with those of the radical anions and dianions of p-oligophenyls (p-terphenyl, p-quaterphenyl, p-quinquephenyl and p-sexiphenyl). The Raman spectra of Na-doped PPP excited at 488.0-514.5 nm and 632.8-1064 nm are attributed, respectively, to negative polarons and bipolarons. Electronic absorption spectra of doped PPP are explained by the coexistence of negative polarons and bipolarons on the basis of the Raman results.

Original languageEnglish
Pages (from-to)516-523
Number of pages8
JournalSynthetic Metals
Volume55
Issue number1
DOIs
Publication statusPublished - 1993 Mar 15
Externally publishedYes

Keywords

  • Raman spectroscopy
  • bipolaron
  • p-oligophenyl
  • polaron
  • poly-p-phenylene

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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