Direct exciton quenching in single molecules of MEH-PPV at 77 K

Oleg Mirzov, F Cichos, C von Borczyskowski, Ivan Scheblykin

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

50 Citeringar (SciVal)

Sammanfattning

Fluorescence blinking behaviour was observed for single molecules of the conjugated polymer poly[2-methoxy,5-(2'-ethylhexyloxy)-p-phenylene-vinylene] (MEH-PPV) at 77 and 300 K. No strict qualitative dependence on temperature was observed, despite of the expected suppression of exciton migration at the low temperature. We assume MEH-PPV molecules to form dense nanoparticles with a characteristic size of about 10 nm at the largest. In such small nanoparticles exciton can be efficiently quenched by a photogenerated quencher due to Forster transfer just after a few hops over the polymer nanoparticle. Thus, long-distance exciton migration is not necessary to have strong fluorescence intensity fluctuations. (C) 2004 Elsevier B.V. All rights reserved.
Originalspråkengelska
Sidor (från-till)286-290
TidskriftChemical Physics Letters
Volym386
Utgåva4-6
DOI
StatusPublished - 2004

Bibliografisk information

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)

Ämnesklassifikation (UKÄ)

  • Atom- och molekylfysik och optik

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