Optoelectrical properties of poly(ethylene oxide)/alum composite

The optical and electrical characteristics of prepared poly(ethylene oxide)/alum composites are studied as a function of alum content and frequency. The optical energy band gaps were determined from the measured absorption spectra. The frequency of the applied electric field and alum content affect the dielectric behavior and the AC electrical conductivity of the prepared solid thin films. Correlation between the observed optical energy gaps and the AC electrical conductivity is presented. Generally, the observed enhancement in the electrical quantities is attributed to impurity, and ionic interactions take place in the bulk of the double electrolyte solid solution.