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Charge transport in transparent conductors: A comparison

Sangeeth, CS Suchand and Jaiswal, Manu and Menon, Reghu (2009) Charge transport in transparent conductors: A comparison. In: Journal of Applied Physics, 105 (6). 063713-063713.

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Abstract

A comparative investigation of charge transport properties is presented, for polymeric [poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)], single-wall carbon nanotube (SWNT) and inorganic (indium tin oxide, ITO), transparent conducting electrodes. The polymeric and nanotube systems show hopping transport at low temperatures, in contrast with the disordered-metal transport in ITO. The low temperature magnetotransport (up to 11 T) and high electric-field transport (up to 500 V/cm) indicate the significant role of nanoscopic scale disorder for charge transport in polymer and nanotube based systems. The results show that characteristic length scales like localization length correlates with the nanomorphology in these systems. Further, the high frequency conductivity measurements (up to 30 MHz) in PEDOT:PSS and SWNT follow the extended pair approximation model [σ(ω)=σ(0)[1+(ω/ω0)s].

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Keywords: carbon nanotubes, conducting polymers, electrodes, galvanomagnetic effects, high-frequency effects, hopping conduction, indium compounds, organic semiconductors
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 28 May 2009 09:23
Last Modified: 19 Sep 2010 05:30
URI: http://eprints.iisc.ernet.in/id/eprint/19944

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