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Fate of Excitations in Conjugated Polymers: Single-Molecule Spectroscopy Reveals Nonemissive "Dark" Regions in MEH-PPV Individual Chains.

Lin, Hongzhen LU ; Tian, Yuxi LU ; Zapadka, Karolina; Persson, Gustav; Thomsson, Daniel LU ; Mirzov, Oleg LU ; Larsson, Per-Olof LU ; Widengren, Jerker and Scheblykin, Ivan LU (2009) In Nano Letters 9. p.4456-4461
Abstract
Single chains of the conjugated polymer MEH-PPV (poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene)) were studied with wide-field fluorescence microscopy (dispersion in inert polymer matrices) and with fluorescence correlation spectroscopy (chloroform solution). The fluorescence yield of individual molecules in matrices was found to be 1-2 orders of magnitude lower than that in solution and it decreased substantially with increasing chain length. It suggests that isolation of MEH-PPV molecules in polymer matrices creates favorable conditions for photogeneration of nonemissive primary excited states.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
9
pages
4456 - 4461
publisher
The American Chemical Society
external identifiers
  • wos:000272395400086
  • pmid:19860455
  • scopus:71949085507
ISSN
1530-6992
DOI
10.1021/nl9027473
language
English
LU publication?
yes
id
28964b91-fde5-4752-8086-7a8bea7f512d (old id 1499916)
date added to LUP
2009-11-06 12:08:11
date last changed
2017-09-03 04:16:00
@article{28964b91-fde5-4752-8086-7a8bea7f512d,
  abstract     = {Single chains of the conjugated polymer MEH-PPV (poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene)) were studied with wide-field fluorescence microscopy (dispersion in inert polymer matrices) and with fluorescence correlation spectroscopy (chloroform solution). The fluorescence yield of individual molecules in matrices was found to be 1-2 orders of magnitude lower than that in solution and it decreased substantially with increasing chain length. It suggests that isolation of MEH-PPV molecules in polymer matrices creates favorable conditions for photogeneration of nonemissive primary excited states.},
  author       = {Lin, Hongzhen and Tian, Yuxi and Zapadka, Karolina and Persson, Gustav and Thomsson, Daniel and Mirzov, Oleg and Larsson, Per-Olof and Widengren, Jerker and Scheblykin, Ivan},
  issn         = {1530-6992},
  language     = {eng},
  pages        = {4456--4461},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Fate of Excitations in Conjugated Polymers: Single-Molecule Spectroscopy Reveals Nonemissive "Dark" Regions in MEH-PPV Individual Chains.},
  url          = {http://dx.doi.org/10.1021/nl9027473},
  volume       = {9},
  year         = {2009},
}