Abstract:
Electrical transport in conducting polymers are fundamentally different from the
conventional metals. Doping of conducting polymers involve introduction of ionic species
which causes disorder. In the context of electrical properties, disorder influences charge carrier
transport. Disorder induced electrical transport is described in terM.S. of quasi-particles such as
solitons, polarons and bi-polarons whose effective masses are greater than electron masses.
Electronic transport thus happens in the background of ionic displacement. This picture
roughly describes the mixed electronic-ionic conduction state in conducting polymers.
Simultaneous probing of electronic and ionic carrier conduction in these mixed conducting
polymers is difficult due to the coupling of the charge carriers and variation of film morphology
due to the perturbations induced in the system during the carrier transport.
