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Volume 7
Innovative Energy & Research
ISSN: 2576-1463
Advanced Energy Materials 2018
August 13-14, 2018
August 13-14, 2018 | Dublin, Ireland
20
th
International Conference on
Advanced Energy Materials and Research
Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C1-003
Fast optical response time and high contrast ratio after dispersion of fluorescent dye into the nematic
liquid crystal
Govind Pathaka, Atul Srivastavaa and Rajiv Manohara
University of Lucknow, India
F
luorescent dye Benzo 2,1,3 thiadiazole has been dispersed into the pure nematic liquid crystal (NLC) 1550C which is
consisted of 4’-(trans,trans-4-alkylbicyclohexyl)carbonates and 4’-(4-(trans,trans-4-alkyl)-4-cyanobicyclohexane, with in
three different concentration in the present investigation. Electro-optical and dielectric parameters have been investigated here.
In this work response time has been measured by Optical Switching Method and found to be decreased after the dispersion
of fluorescent dye into the pure NLC 1550C. This fast optical response time measurement is the main finding of the present
investigation. Rotational viscosity has also been calculated here and found to be decreased for dispersed system as compare to
pure NLC. Polarizing Optical Microscope (POM) images have also been taken in the current study which shows that alignment
as well as contrast has been improved after the dispersion of fluorescent dye. Contrast Ratio (CR) has also been measured
here by applying a square wave and found to be increased for the dispersed system. This is also a promising result of this
investigation. The outcome of present investigation may be very useful in the liquid crystal displays (LCDs) and other devices
which requires fast response time.
govindpathak001@gmail.com