Photoexcitations in poly(paraphenylene vinylene)

Z. Shuai, J. L. BrÉDas, W. P. Su

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Within a theoretical approach including both electron-phonon and electron-electron interaction terms, we investigate the relaxation processes of photoexcited states in oligomers and long chains of poly(paraphenylene vinylene), PPV. Our direct calculations indicate that in PPV the difference in relaxation energy between two polarons and one singlet [triplet] polaron-exciton decreases [increases] with the Hubbard U term; the long-range interaction V terms stabilize both the singlet and triplet polaron-excitons. The theoretical simulation of the photoinduced absorption spectra both for singlet and triplet states are in very a good agreement with experiment.

Original languageEnglish (US)
Pages (from-to)525-530
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Volume256
Issue number1
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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