Electrical Parameters of Different Concentrations of Methyl Red in Fullerene Doped Liquid Crystal

Abstract

Dielectric anisotropy and relaxation time of a liquid crystal (LC) system, containing fullerene and methyl red (MR) dye, were studied via impedance spectroscopy technique under a bias voltage. Dye concentration is tried to be 0.1%, 0.5%, and 1% in host nematic liquid crystal coded E7. Dielectric permittivity and dielectric anisotropy values of the samples were investigated between the frequency ranges of 100–10 MHz. It is seen that dielectric anisotropy is strongly affected by doping ratio and this value decreases with increasing dye. Also, relaxation time τ and critical frequency values were calculated depending on voltage of different dye ratios.