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Temperature effect on single chain MEH-PPV spectra

Rönne, Cecilie LU ; Trägårdh, Johanna LU ; Hessman, Dan LU and Sundström, Villy LU (2004) In Chemical Physics Letters 388(1-3). p.40-45
Abstract
We report single molecule photoluminescence spectra of poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) in PMMA-matrix at 293 and 20 K with 90 s acquisition time. All spectra at 293 K are very similar, contrary to literature results with acquisition times < 5 s. We propose that fluctuations of conformations with distinct emission properties cause broadening of the spectra and reduce the differences in fluorescence spectra between separate chains. At 20 K the spectrum from a single chain consists of a few narrow peaks with absence of major spectral evolution within tens-of-minutes. The emission from distinct chains is spread over 3000 cm(-1) characterizing different frozen conformations. (C) 2004 Elsevier B.V. All... (More)
We report single molecule photoluminescence spectra of poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) in PMMA-matrix at 293 and 20 K with 90 s acquisition time. All spectra at 293 K are very similar, contrary to literature results with acquisition times < 5 s. We propose that fluctuations of conformations with distinct emission properties cause broadening of the spectra and reduce the differences in fluorescence spectra between separate chains. At 20 K the spectrum from a single chain consists of a few narrow peaks with absence of major spectral evolution within tens-of-minutes. The emission from distinct chains is spread over 3000 cm(-1) characterizing different frozen conformations. (C) 2004 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Physics Letters
volume
388
issue
1-3
pages
40 - 45
publisher
Elsevier
external identifiers
  • wos:000220727000009
  • scopus:1842421195
ISSN
0009-2614
DOI
10.1016/j.cplett.2004.02.068
language
English
LU publication?
yes
id
1cecf661-a0f8-4a58-b0b1-cf83f5115ed4 (old id 139058)
date added to LUP
2007-07-03 16:23:12
date last changed
2017-10-01 04:52:39
@article{1cecf661-a0f8-4a58-b0b1-cf83f5115ed4,
  abstract     = {We report single molecule photoluminescence spectra of poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV) in PMMA-matrix at 293 and 20 K with 90 s acquisition time. All spectra at 293 K are very similar, contrary to literature results with acquisition times &lt; 5 s. We propose that fluctuations of conformations with distinct emission properties cause broadening of the spectra and reduce the differences in fluorescence spectra between separate chains. At 20 K the spectrum from a single chain consists of a few narrow peaks with absence of major spectral evolution within tens-of-minutes. The emission from distinct chains is spread over 3000 cm(-1) characterizing different frozen conformations. (C) 2004 Elsevier B.V. All rights reserved.},
  author       = {Rönne, Cecilie and Trägårdh, Johanna and Hessman, Dan and Sundström, Villy},
  issn         = {0009-2614},
  language     = {eng},
  number       = {1-3},
  pages        = {40--45},
  publisher    = {Elsevier},
  series       = {Chemical Physics Letters},
  title        = {Temperature effect on single chain MEH-PPV spectra},
  url          = {http://dx.doi.org/10.1016/j.cplett.2004.02.068},
  volume       = {388},
  year         = {2004},
}