Conformational disorder and energy migration in MEH-PPV with partially broken conjugation

MM Grage, PW Wood, A Ruseckas, T Pullerits, W Mitchell, PL Burn, Ifor David William Samuel, V Sundstrom

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93 Citations (Scopus)

Abstract

In order to obtain a better understanding of the role of conformational disorder in the photophysics of conjugated polymers the ultrafast transient absorption anisotropy of partially deconjugated MEH-PPV has been measured. These data have been compared to the corresponding kinetics of Monte Carlo-simulated polymer chains, and estimates of the energy hopping time and energy migration distances for the polymers have been obtained. We find that the energy migration in the investigated MEH-PPV is approximately 3 times faster than in previously studied polythiophenes. We attribute this to a more disordered chain conformation in MEH-PPV. (C) 2003 American Institute of Physics.

Original languageEnglish
Pages (from-to)7644-7650
Number of pages7
JournalJournal of Chemical Physics
Volume118
Issue number16
DOIs
Publication statusPublished - 22 Apr 2003

Keywords

  • LIGHT-EMITTING-DIODES
  • LONG POLYENE CHAINS
  • EXCITATION TRANSPORT
  • POLYMERS
  • SPECTRA
  • ABSORPTION
  • MODEL
  • POLY(PHENYLENEVINYLENE)
  • DEPENDENCE
  • DYNAMICS

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