Photoinduced infrared absorptions from conjugated polymers with nondegenerate ground states

Yun Hwan Cha, Yukio Furukawa, Mitsuo Tasumi, Takanobu Noguchi, Toshihiro Ohnishi

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Abstract

Photoinduced infrared absorptions from poly( p-phenylene), poly( p-phenylenevinylene), poly(2,5-dioctyloxy-p-phenylenevinylene) and poly(2,5-thienylenevinylene) have been measured using the FT-IR difference-spectrum method. The observed photoinduced bands are attributable to photo-generated charged species which give rise to giant infrared intensities. The excitation-power dependences of the photoinduced absorption intensities can be explained by means of the bimolecular recombination of the positive and negative polarons that are formed from a polaron pair (interchain charge-transfer exciton) generated by photoirradiation.

Original languageEnglish
Pages (from-to)159-163
Number of pages5
JournalChemical Physics Letters
Volume273
Issue number3-4
DOIs
Publication statusPublished - 1997 Jul 18

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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