Excitons and biexcitons in poly(para-phenylenevinylene)

M. Chandross, F. Guo, Sumitendra Mazumdar

Research output: Contribution to journalArticle

3 Citations (Scopus)

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
StatePublished - Mar 1 1995

Fingerprint

Excitons
excitons
Binding energy
binding energy
Electron-electron interactions
Conjugated polymers
Excited states
Light absorption
electron scattering
optical absorption
inclusions
Derivatives
polymers
excitation
LDS 751
poly(4-phenylenevinylene)
electrons
Experiments

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

Cite this

Excitons and biexcitons in poly(para-phenylenevinylene). / Chandross, M.; Guo, F.; Mazumdar, Sumitendra.

In: Synthetic Metals, Vol. 69, No. 1-3, 01.03.1995, p. 625-628.

Research output: Contribution to journalArticle

Chandross, M. ; Guo, F. ; Mazumdar, Sumitendra. / Excitons and biexcitons in poly(para-phenylenevinylene). In: Synthetic Metals. 1995 ; Vol. 69, No. 1-3. pp. 625-628.
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