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 language | English |
---|---|
Pages (from-to) | 7644-7650 |
Number of pages | 7 |
Journal | Journal of Chemical Physics |
Volume | 118 |
Issue number | 16 |
DOIs | |
Publication status | Published - 22 Apr 2003 |
Keywords
- LIGHT-EMITTING-DIODES
- LONG POLYENE CHAINS
- EXCITATION TRANSPORT
- POLYMERS
- SPECTRA
- ABSORPTION
- MODEL
- POLY(PHENYLENEVINYLENE)
- DEPENDENCE
- DYNAMICS