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Oleg Mirzov

System architect

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

Author

  • Hongzhen Lin
  • Yuxi Tian
  • Karolina Zapadka
  • Gustav Persson
  • Daniel Thomsson
  • Oleg Mirzov
  • Per-Olof Larsson
  • Jerker Widengren
  • Ivan Scheblykin

Summary, in English

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.

Department/s

  • Chemical Physics
  • Pure and Applied Biochemistry

Publishing year

2009

Language

English

Pages

4456-4461

Publication/Series

Nano Letters

Volume

9

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Nano Technology

Status

Published

ISBN/ISSN/Other

  • ISSN: 1530-6992