Excitons and biexcitons in poly(para-phenylenevinylene)

M. Chandross, F. Guo, Sumitendra Mazumdar

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The Hückel model fails to describe optical absorption in PPV and its derivatives, and explicit inclusion of moderate electron-electron interactions is essential for a proper theoretical description. The lowest optical state is an exciton with a binding energy estimated as 0.90 ± 0.15 eV, in excellent agreement with experiment. Such a large exciton binding energy strongly suggests stable biexcitons. The concept of biexcitons in π-conjugated polymers is introduced, and picosecond photoinduced absorption is explained as excited state absorption from the exciton to the biexciton.

Original languageEnglish (US)
Pages (from-to)625-628
Number of pages4
JournalSynthetic Metals
Volume69
Issue number1-3
DOIs
Publication statusPublished - Mar 1 1995

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ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Condensed Matter Physics
  • Polymers and Plastics

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