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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
; ; ; ; ; and
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
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
id
677fae2f-ecd1-41bb-b087-7b61684e6466 (old id 157836)
date added to LUP
2016-04-01 17:01:02
date last changed
2022-03-22 22:40:09
@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}},
  doi          = {{10.1103/PhysRevB.72.115214}},
  volume       = {{72}},
  year         = {{2005}},
}