Journal
NANO LETTERS
Volume 9, Issue 12, Pages 4456-4461Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl9027473
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Funding
- Swedish Research Council
- Royal Physiographic Society in Lund
- Knut & Alice Wallenberg Foundation
- Crafoord Foundation
- Carl Trygger Foundation
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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.
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