Influence of methyl red as a dopant on the electrical properties and device performance of liquid crystals.

Abstract

The ionic effect in nematic liquid-crystal (LC) cells containing the azo dye methyl red was investigated by means of dielectric spectroscopy, measurements of voltage holding ratio (VHR) and ultraviolet/visible absorption spectroscopy. The experimental results indicated that incorporating a minute amount of the methyl red (< 0.03 wt%) in the LC host leads to the suppression of the ionic effect caused by impurity ions. Practically, the doped LC cells with a dye content of 0.02 wt% showed improved VHR and promoted lifetime by 15% and 180%, respectively, in virtually no expense of the optical transmittance.

DOI: 10.1364/OE.22.031347

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Cite this paper

@article{Wu2014InfluenceOM, title={Influence of methyl red as a dopant on the electrical properties and device performance of liquid crystals.}, author={Po-Chang Wu and Chien-Tsung Hou and Yu-Cheng Hsiao and Wei Lee}, journal={Optics express}, year={2014}, volume={22 25}, pages={31347-55} }