What do nonlinear optical spectroscopy and picosecond photinduced absorption have to say about excited states in conjugated polymers?

M. Chandross, S. Mazumdar

Research output: Contribution to journalArticle

Abstract

We present a self-consistent picture of the excited state energy spectrum of poly(para-phenylene vinylene) based on theoretical calculations of exicted states and and experimental electroabsorption (EA) and picosecond photoinduced absorption measurements (PA). Our calculations place the one electron-one hole continuum (nBu) at 0.9 ± 0.2 eV above the 1Bu exciton. This is in agreement with EA and ps PA in the i.r., which finds an even-parity exciton (the mAg) about 0.7 eV away from the 1Bu. The high energy ps PA at 1.5 - 1.7 eV is to a biexciton whose energy is consistent with our estimates.

Original languageEnglish (US)
Pages (from-to)1095-1096
Number of pages2
JournalSynthetic Metals
Volume85
Issue number1-3
StatePublished - Mar 15 1997

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Keywords

  • Multiphoton absorption spectroscopy
  • Poly(phenylene vinylene) and derivatives
  • Semi-empirical models and model calculations

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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