Ac Conductivity and Dielectric Measurements of Bulk Cobalt Phthalocyanine (COPC)
Cobalt phthalocyanine (CoPc) was prepared as a compressed pellet with evaporated ohmic gold (Au) electrodes. AC conductivity and dielectric measurements were performed as a function of both frequency (102 – 106 Hz) and temperature (298 – 407 K). The ac conductivity showed ωs dependence, where ω is the angular frequency and s is a frequency exponent. The behaviour of ac conductivity was interpreted by the correlated barrier hopping (CBH) model. Dielectric constant and dielectric loss were found to decrease by increasing frequency and increase by increasing temperature.
Key words- Cobalt phthalocyanine (CoPc), AC conductivity, dielectric properties.