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Ultrafast depolarization of the fluorescence in a conjugated polymer

Ruseckas, A; Wood, P; Samuel, I D W; Webster, G R; Mitchell, W J; Burn, P L and Sundström, Villy LU (2005) In Physical Review B (Condensed Matter and Materials Physics) 72(11). p.1-115214
Abstract
The effect of the extent of electron conjugation on the primary photophysics in semiconducting polymers is reported. A rapid depolarization of photoluminescence and transient absorption, which indicates a reorientation of the transition dipole moment by ~30° on a sub-100 fs time scale, is observed in the fully conjugated polymer poly[2-(2'-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV). In contrast, partially conjugated polymers exhibit a much slower depolarization. The results reveal rapid changes of exciton delocalization in the fully conjugated MEH-PPV driven by structural relaxation.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
72
issue
11
pages
1 - 115214
publisher
American Physical Society
external identifiers
  • wos:000232229100081
  • scopus:29744467650
ISSN
1098-0121
DOI
10.1103/PhysRevB.72.115214
language
English
LU publication?
yes
id
677fae2f-ecd1-41bb-b087-7b61684e6466 (old id 157836)
date added to LUP
2007-07-03 16:27:34
date last changed
2017-11-12 04:03:34
@article{677fae2f-ecd1-41bb-b087-7b61684e6466,
  abstract     = {The effect of the extent of electron conjugation on the primary photophysics in semiconducting polymers is reported. A rapid depolarization of photoluminescence and transient absorption, which indicates a reorientation of the transition dipole moment by ~30° on a sub-100 fs time scale, is observed in the fully conjugated polymer poly[2-(2'-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV). In contrast, partially conjugated polymers exhibit a much slower depolarization. The results reveal rapid changes of exciton delocalization in the fully conjugated MEH-PPV driven by structural relaxation.},
  author       = {Ruseckas, A and Wood, P and Samuel, I D W and Webster, G R and Mitchell, W J and Burn, P L and Sundström, Villy},
  issn         = {1098-0121},
  language     = {eng},
  number       = {11},
  pages        = {1--115214},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Ultrafast depolarization of the fluorescence in a conjugated polymer},
  url          = {http://dx.doi.org/10.1103/PhysRevB.72.115214},
  volume       = {72},
  year         = {2005},
}