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

TitleConformational disorder and energy migration in MEH-PPV with partially broken conjugation
Publication TypeJournal Article
Year of Publication2003
AuthorsGrage, M. M. L., Wood P. W., Ruseckas A., Pullerits T., Mitchell W., Burn P. L., Samuel I. D. W., and Sundstrom V.
JournalJournal Of Chemical Physics
Volume118
Issue16
Pagination7644–7650
Date Publishedapr
AbstractIn 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.
DOI10.1063/1.1562190