Frequency Dependence of The Conductivity and Dielectric Constant of Ch(Ircl6) Y and Ch(I)Y

Abstract

Abstract We have measured the ac properties of polyacetylene doped with H2IrCl6 6H2O and I2 from 105 to 107 Hz at room temperature. We find in both cases that the conductivity is only weakly dependent on frequency, in agreement with previous work.1,2 However, we find that the dielectric constant of CH(IrCl6)y is anomalously large ≃104. We suggest that the large dielectric constant can be modeled by an effective medium theory assuming that the CH(IrCl6)y is a mixture of conducting and insulating regions. TEM evidence in support of the model will be presented. The results of CH(IrCl6)y will be contrasted with CH(I)y where TEM evidence shows a uniform distribution of dopant in the polyacetylene and the dielectric constant is significantly lower.