Physical characteristics, dielectric properties and electrical conductivity of erythrosine B/PVA polymeric composite films: effect of erythrosine B concentration

Erythrosine B/PVA polymeric composite films were prepared with different concentrations of Erythrosine B (EB) as 0, 1, 2, and 4 wt% of EB utilizing the casting procedure. The crystal structure of Erythrosine B /PVA films was identified by X-ray diffraction patterns (XRD). The frequency (100 Hz − 1 MHz) reliance on both dielectric constant (ε₁) and dielectric loss (ε₂) was investigated. Both ε₁ and ε₂ of Erythrosine B/PVA polymeric composite films decreased with increasing frequency and increased by rising percent EB wt%. The ac conductivity of Erythrosine B/PVA films showed increased behavior by raising frequency. Moreover, the frequency exponent (s) decreased slightly from 0.99 to 0.96 with increasing concentrations. The increase in Erythrosine B content enhances the values of \(\:{{\sigma\:}}_{\text{a}\text{c}}\) for EB/PVA polymeric composite films. The density of states N(E_f) is calculated at specific frequencies for different concentrations of EB for Erythrosine B /PVA polymeric composite films, and it has values in the order of 10¹⁸ cm^− 3 eV^− 1.