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