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D.C. conductivity measurements on amorphous conducting carbon

Sayeed, Ahmed and Bhattacharyya, Somnath and Subramanyam, SV (1995) D.C. conductivity measurements on amorphous conducting carbon. In: International Conference on Molecular Electronics and Biocomputing, 25-30 September 1994, Goa, India, pp. 231-233.

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Abstract

Amorphous conducting carbon films are obtained by pyrolysis of PTCDA (perylene tetracarboxylic dianhydride) at different temperatures (in the range 700-1000°C) and their DC conductivity is studied as a function of temperature in the range 4.2-300 K. It is observed that the conductivity has an activated temperature dependence with small activation energies (0.02-0.004 eV). The effects of pyrolysis temperature and also of heat treatment after preparation are studied. It is observed that the conductivity increases and the activation energy decreases with the increasing pyrolysis temperature. Heat treatment of samples at temperatures higher than that of pyrolysis has a similar effect on properties, even though the structure does not appear to depend appreciably on the pyrolysis temperature.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Amorphous conducting carbon;PTCDA;Pyrolysis;DC conductivity
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 21 Sep 2007
Last Modified: 19 Sep 2010 04:38
URI: http://eprints.iisc.ernet.in/id/eprint/10985

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