Direct exciton quenching in single molecules of MEH-PPV at 77 K
(2004) In Chemical Physics Letters 386(4-6). p.286-290- Abstract
- 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... (More)
- 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. (Less)
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https://lup.lub.lu.se/record/139105
- author
- Mirzov, Oleg LU ; Cichos, F ; von Borczyskowski, C and Scheblykin, Ivan LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Chemical Physics Letters
- volume
- 386
- issue
- 4-6
- pages
- 286 - 290
- publisher
- Elsevier
- external identifiers
-
- wos:000220124700012
- scopus:1442311994
- ISSN
- 0009-2614
- DOI
- 10.1016/j.cplett.2004.01.066
- 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)
- id
- 6d370920-d312-43f4-b9ae-9e95717daefe (old id 139105)
- date added to LUP
- 2016-04-01 15:18:44
- date last changed
- 2024-04-25 08:27:03
@article{6d370920-d312-43f4-b9ae-9e95717daefe, abstract = {{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.}}, author = {{Mirzov, Oleg and Cichos, F and von Borczyskowski, C and Scheblykin, Ivan}}, issn = {{0009-2614}}, language = {{eng}}, number = {{4-6}}, pages = {{286--290}}, publisher = {{Elsevier}}, series = {{Chemical Physics Letters}}, title = {{Direct exciton quenching in single molecules of MEH-PPV at 77 K}}, url = {{http://dx.doi.org/10.1016/j.cplett.2004.01.066}}, doi = {{10.1016/j.cplett.2004.01.066}}, volume = {{386}}, year = {{2004}}, }