Doping and Irradiation Dependence of Electrical Conductivity of Fe³⁺and Ni²⁺Doped Polyvinyl Alcohol Films

Abstract

PVA and doped PVA films were prepared by solution casting. The Change in electrical conductivity of pure PVA and transition elements FeCl3 and NiCl26H2O doped PVA films with and without -irradiation in the temperature range 50-130 C has been investigated using four point probe technique. The dc electrical conductivity increases with increase in dopant concentration, with temperature and -irradiation. The results revealed that --irradiation enhances the electrical conductivity. The variation of electrical conductivity with temperature, before and after irradiation is due to the intermolecular hydrogen bonding between Fe 3+ with OH group of PVA and Ni 2+ with OH group of PVA. We found that Fe 3+ doped PVA films show higher conductivity than Ni 2+ doped PVA films.