Related Experiment Video
Updated: Jun 1, 2026
Manufacturing of Three-dimensionally Microstructured Nanocomposites through Microfluidic Infiltration
Published on: March 12, 2014
Dispersive hole transport in polymer:carbon nanotube composites
A R Inigo1, S J Henley, S R P Silva
1Nanoelectronics Centre (NEC), Advanced Technology Institute (ATI), University of Surrey, Guildford, Surrey, UK.
Abstract:
The hole transport properties of poly(2-methoxy, 5-(2'-ethyl-hexoxy)-p-phenylene vinylene) (MEH-PPV) blended with acid oxidized multiwall carbon nanotubes (COOH-MWCNTs) were investigated in a diode configuration using the time-of-flight (TOF) photocurrent method. While the room temperature hole mobility in pure MEH-PPV films was non-dispersive with positive field dependent mobility, MEH-PPV:COOH-MWCNT blended devices exhibited dispersive transport and negative field dependent mobility. This indicates that the hole mobility in this composite is influenced by positional disorder caused by the presence of COOH-MWCNTs in the MEH-PPV matrix. These results strongly suggest that the distribution of COOH-MWCNTs optimising in the organic matrix is important for charge transport in the high mobility nanotube component to be activated, when used in hybrid material systems.
More Related Videos
08:33Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process
Published on: May 30, 2017
09:19Fabrication and Characterization of Disordered Polymer Optical Fibers for Transverse Anderson Localization of Light
Published on: July 29, 2013
Related Concept Videos
01:21Carrier Transport
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
01:10Polymers: Molecular Weight Distribution