Metal/Semiconducting Polyaniline Heterojunctions

Abstract

Semiconducting polymers are important for their potential application in electronic device fabrication ¹. The polymers can be prepared in semiconducting form by manipulating their oxidation, reduction and doping during polymerization and synthesis ². The applicability of a semiconducting polymer is as a metal/polymer electrode or three electrode system for use in temperature sensor and gas sensor devices. The performance of a solid state device depends upon the junction characteristics, the work function of the metal and the polymer, the energy band gap of polymer and other electronic parameters. The advantages of polymer based electronic device over the inorganic ones are, the cost effectiveness, dispensing away with sofisticated crystal growth and its light weight. Metal/polypyrrolejunctions have been prepared³. The characterization of metal/ppolyaniline junctions with various metals, is reported here.