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

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

doi:10.1016/j.cplett.2004.01.066

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

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

Chemical Physics

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	286-290
Journal	Chemical Physics Letters
Volume	386
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2004.01.066
Publication status	Published - 2004

Bibliographical note

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)

Subject classification (UKÄ)

Atom and Molecular Physics and Optics

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10.1016/j.cplett.2004.01.066

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title = "Direct exciton quenching in single molecules of MEH-PPV at 77 K",

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 = "Oleg Mirzov and F Cichos and \{von Borczyskowski\}, C and Ivan Scheblykin",

note = "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)",

year = "2004",

doi = "10.1016/j.cplett.2004.01.066",

language = "English",

volume = "386",

pages = "286--290",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Direct exciton quenching in single molecules of MEH-PPV at 77 K

AU - Mirzov, Oleg

AU - Cichos, F

AU - von Borczyskowski, C

AU - Scheblykin, Ivan

N1 - 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)

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/1442311994

U2 - 10.1016/j.cplett.2004.01.066

DO - 10.1016/j.cplett.2004.01.066

M3 - Article

SN - 0009-2614

VL - 386

SP - 286

EP - 290

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

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

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