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.
Highlights
Liquid crystals (LC) are of primary importance in various device applications and their availability and compatibility with these applications are promising [1, 2]
We have focused on the concentration effect of methyl red (MR) dye and fullerene doped nematic liquid crystal system
Concentration dependency of molecular orientation in dyedoped nematic LC was examined through a substantial sample LC system, which contains a famous dye MR as a doping agent
Summary
Liquid crystals (LC) are of primary importance in various device applications and their availability and compatibility with these applications are promising [1, 2]. In the scope of this work, a further optimization is aimed for tailored MR + C60 doped LC systems according to the explicit effects of MR concentration on the electrical properties of the LC system. Is the most preferred technique to understand molecular mechanisms and full electrical characterization to acquire and optimize device parameters such as relaxation time, dielectric anisotropy, and critical frequency at various bias voltage values. It this study, we have focused on the concentration effect of MR dye and fullerene doped nematic liquid crystal system. We have evaluated the dielectric character, relaxation parameter, and critical frequency as a function of frequency at various bias voltages
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