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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
; ; and
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
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), Solid State Physics (011013006)
id
1cecf661-a0f8-4a58-b0b1-cf83f5115ed4 (old id 139058)
date added to LUP
2016-04-01 17:05:22
date last changed
2022-03-15 05:05:17
@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}},
  doi          = {{10.1016/j.cplett.2004.02.068}},
  volume       = {{388}},
  year         = {{2004}},
}