Effect of NaI doping on some physical characteristic of (PVA)0.9-(KHSO4)0.1 composite films (original) (raw)

2013

Abstract

ABSTRACT Electrolyte composite films of Polyvinyl alcohol (PVA)0.9 filled with potassium hydrogen sulfate (KHSO4)0.1 with different concentration of sodium iodide (NaI) were prepared using solution caste technique. The absorption spectral analysis data were carred for the samples to determine the influence of NaI contents, the obtained data showed that the direct allowed optical energy gap of the films decreases from 6.316 eV to 4.964 eV with increasing NaI contents up to 20% weight. Furthermore, in order to understand the behavior of electrical conduction in these composite, the alternating electrical conductivity and dielectric permittivity have been investigated for different concentration of NaI at temperature range (300-350)K over the frequency ranging from 10KHz to 1MHz. The electrical conductivity of the composite increased with increasing temperature and it obeys power law Aω^s in which s is in the range of 0.3<s<0.7.

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