Electrical Conduction mechanism in Copper-Poly(Vinyl Alchol) Composites

Abstract

Electrical conduction of pure poly(vinyl alcohol) (PVA) and copper poly(vinyl alcohol) composites (Cu-PVA) is studied as function of voltage and temperature. From log I - log V relations, it is found that we cannot explain the conduction mechanism on the basis of space-charge limited current. The values of Schottky field lowering constant β_SR was calculated and compared with β_exp which was calculated from the slope of In I - V^½. It is found that at low temperature for pure sample the conduction may be due to a combination of electronic and ionic parts. But for other samples a quite large difference between β_PF and β_exp is observed. We conclude that the In I - V^½ study of these composites samples does not help us in knowing the exact case of the conduction mechanism of these samples.