Confinement-induced enhancement of hole mobility in MEH-PPV

Template wetting nanofabrication was used to create high-aspect-ratio, nanotubular structures from the semiconducting polymer poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene). Carrier transport in these nanostructures was determined to be space-charge-limited and thermally activated, with...

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Bibliographic Details
Published in:Synthetic metals 2009-09, Vol.159 (17-18), p.1786-1791
Main Authors: Cannon, Joseph P., Bearden, Steven D., Khatkhatay, Fauzia M., Cook, Joseph, Selmic, Sandra Zivanovic, Gold, Scott A.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Forms of application and semi-finished materials
Hole mobility
MEH-PPV
Miscellaneous
Nanotube
Phenylenevinylene
Photovoltaic
Polymer industry, paints, wood
Space-charge-limited current
Technology of polymers
Template nanofabrication
Template wetting
Ultraviolet–visible spectroscopy
UV–vis
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Summary:Template wetting nanofabrication was used to create high-aspect-ratio, nanotubular structures from the semiconducting polymer poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene). Carrier transport in these nanostructures was determined to be space-charge-limited and thermally activated, with low-field mobilities shown to up to three be orders of magnitude higher than those typically reported for thin-films of the same material. Ultraviolet–visible spectroscopy showed a 0.3–0.6eV reduction in the leading-edge absorption energy of polymer nanotubular structures compared to thin-films or solutions. Photovoltaic devices constructed from the nanotubes demonstrated photovoltaic fill factors superior to those measured in similarly constructed thin-film devices. These results are indicative of a confinement-induced ordering present in the nanotubular material.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2009.05.035