Browsing by Author "Sivaraman, S"
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Item Investigations on the mechanism of carrier transport in plasma polymerized pyrrole thin films(JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2010) John, J; Sivaraman, S; Jayalekshmy, S; Anantharaman, MRPlasma polymerization is found to be an excellent technique for the preparation of good quality, pinhole-free, polymer thin films from different monomer precursors. The present work describes the preparation and characterization of polypyrrole (PPy) thin films by ac plasma polymerization technique in their pristine and in situ iodine doped forms. The electrical conductivity studies of the aluminium-polymer-aluminium (Al-polymer-Al) structures have been carried out and a space charge limited conduction (SCLC) mechanism is identified as the most probable mechanism of carrier transport in these polymer films. The electrical conductivity shows an enhanced value in the iodine doped sample. The reduction of optical band gap by iodine doping is correlated with the observed conductivity results. (C) 2010 Elsevier Ltd. All rights reserved.