Single particle spectroscopy on composite MEH-PPV/PCBM nanoparticles
Abbreviated Journal Title
J. Lumines.
Keywords
Conjugated polymers; Photovoltaic; Single molecule spectroscopy; Nanoparticles; Morphology; CONJUGATED-POLYMER NANOPARTICLES; ELECTRONIC-ENERGY TRANSFER; LIGHT-EMITTING-DIODES; SOLAR-CELLS; MOLECULE SPECTROSCOPY; PHOTOVOLTAIC; CELLS; INTERCHAIN INTERACTIONS; ORGANIC NANOPARTICLES; NANOSCALE; MORPHOLOGY; CONDUCTING POLYMER; Optics
Abstract
The preparation and characterization of composite MEH-PPV/PCBM nanoparticles with doping levels up to 75 wt% PCBM is reported. These nanoparticles represent structures in between single molecules and bulk that allow for a detailed investigation of the role of nanostructure on the properties of the corresponding functional materials. Combining this material system with single particle spectroscopy studies reveals molecular scale information on the extent to which variations in polymer chain folding and interactions between polymer chains and fullerenes affect material morphology and photophysical properties. Key observations are that the single particle ensemble spectra shift with respect to each other depending on PCBM doping levels, and that the vibronic structure of the single particle ensemble spectra changes with PCBM doping levels. These observations are indicative of a reduction in conducting polymer conjugation length and interchain interactions due to steric effects caused by the presence of PCBM that result in reduced exciton transport. (C) 2008 Elsevier B.V. All rights reserved.
Journal Title
Journal of Luminescence
Volume
129
Issue/Number
5
Publication Date
1-1-2009
Document Type
Article
Language
English
First Page
423
Last Page
429
WOS Identifier
ISSN
0022-2313
Recommended Citation
"Single particle spectroscopy on composite MEH-PPV/PCBM nanoparticles" (2009). Faculty Bibliography 2000s. 2225.
https://stars.library.ucf.edu/facultybib2000/2225
Comments
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