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Luminescence quenching by inter-chain aggregates in substituted polythiophenes

Ruseckas, Arvydas; Namdas, Ebinazar B.; Theander, Mathias; Svensson, Mattias; Yartsev, Arkady LU ; Zigmantas, Donatas LU ; Andersson, Mats R.; Inganas, Olle and Sundström, Villy LU (2001) In Journal of Photochemistry and Photobiology, A: Chemistry 144(1). p.3-12
Abstract
Time-resolved photo luminescence spectra measured in solid films of two polythiophene derivatives with different chain packing allow to distinguish emission of intra-chain excitations from the luminescence of inter-chain aggregates. Aggregate luminescence is red shifted by about 0.1 eV relative to intra-chain emission and shows vibronic coupling to the C=C bond stretch with the Huang-Phys factor of S approximate to 1.5, which is twice bigger than that of the intra-chain emission. Combining time resolved luminescence data with femtosecond transient absorption, we show that the dynamic quenching of the luminescence in films with dense chain packing is mainly due to excitation energy transfer to aggregates. The radiative lifetime of the... (More)
Time-resolved photo luminescence spectra measured in solid films of two polythiophene derivatives with different chain packing allow to distinguish emission of intra-chain excitations from the luminescence of inter-chain aggregates. Aggregate luminescence is red shifted by about 0.1 eV relative to intra-chain emission and shows vibronic coupling to the C=C bond stretch with the Huang-Phys factor of S approximate to 1.5, which is twice bigger than that of the intra-chain emission. Combining time resolved luminescence data with femtosecond transient absorption, we show that the dynamic quenching of the luminescence in films with dense chain packing is mainly due to excitation energy transfer to aggregates. The radiative lifetime of the lowest excited state of the aggregate with the optical gap of 1.84-1.9 eV is estimated to be about 20 ns. The aggregate contribution to the total luminescence in the polythiophene films with dense chain packing is about 50% and does not change significantly with temperature. (C) 2001 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
pairs, electron, films, ultrafast, luminescence, conjugated polymers, excitation energy transfer, physical dimers
in
Journal of Photochemistry and Photobiology, A: Chemistry
volume
144
issue
1
pages
3 - 12
publisher
Elsevier
external identifiers
  • scopus:0011586924
ISSN
1873-2666
DOI
10.1016/S1010-6030(01)00517-2
language
English
LU publication?
yes
id
b55a401b-cd89-4c64-a517-d1b034c722c9 (old id 1433026)
date added to LUP
2009-07-01 11:57:23
date last changed
2018-09-02 04:06:41
@article{b55a401b-cd89-4c64-a517-d1b034c722c9,
  abstract     = {Time-resolved photo luminescence spectra measured in solid films of two polythiophene derivatives with different chain packing allow to distinguish emission of intra-chain excitations from the luminescence of inter-chain aggregates. Aggregate luminescence is red shifted by about 0.1 eV relative to intra-chain emission and shows vibronic coupling to the C=C bond stretch with the Huang-Phys factor of S approximate to 1.5, which is twice bigger than that of the intra-chain emission. Combining time resolved luminescence data with femtosecond transient absorption, we show that the dynamic quenching of the luminescence in films with dense chain packing is mainly due to excitation energy transfer to aggregates. The radiative lifetime of the lowest excited state of the aggregate with the optical gap of 1.84-1.9 eV is estimated to be about 20 ns. The aggregate contribution to the total luminescence in the polythiophene films with dense chain packing is about 50% and does not change significantly with temperature. (C) 2001 Elsevier Science B.V. All rights reserved.},
  author       = {Ruseckas, Arvydas and Namdas, Ebinazar B. and Theander, Mathias and Svensson, Mattias and Yartsev, Arkady and Zigmantas, Donatas and Andersson, Mats R. and Inganas, Olle and Sundström, Villy},
  issn         = {1873-2666},
  keyword      = {pairs,electron,films,ultrafast,luminescence,conjugated polymers,excitation energy transfer,physical dimers},
  language     = {eng},
  number       = {1},
  pages        = {3--12},
  publisher    = {Elsevier},
  series       = {Journal of Photochemistry and Photobiology, A: Chemistry},
  title        = {Luminescence quenching by inter-chain aggregates in substituted polythiophenes},
  url          = {http://dx.doi.org/10.1016/S1010-6030(01)00517-2},
  volume       = {144},
  year         = {2001},
}