首页|Influence of orange azo dichroic dye on morphological, electro-optical, phase transition and absorption behaviour of ZnO nanoparticles-induced homeotropically aligned liquid crystal display cell
Influence of orange azo dichroic dye on morphological, electro-optical, phase transition and absorption behaviour of ZnO nanoparticles-induced homeotropically aligned liquid crystal display cell
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Springer Nature
In this paper, the influence of orange azo dichroic dye on morphological, electro-optical (EO), phase transition and absorption behavior of zinc oxide (ZnO) nanoparticles (NPs)-induced homeotropically aligned liquid crystal (HALC) cells have been studied. Two sample cells were prepared for experimental analysis. The NPs-induced HALC cell was prepared via doping of optimized concentration (0.3 wt/wt %) of ZnO NPs in negative anisotropic host liquid crystal (LC). Another cell was prepared with the same mixture in addition to doping of a fixed amount of orange azo dichroic dye. Experimental results revealed that the addition of dichroic dye in ZnO NPs-induced HALC cell lessens the threshold and operating voltages compared with pristine HALC cell. Comparatively higher contrast was observed for dye-doped ZnO NPs-induced HALC cell due to presence of the dye molecules which resulted in a slight trivial minute decrease in OFF state transmission. In addition, the phase behavior was also studied for prepared samples and found a shift to slightly higher transition (from nematic to isotropic) temperature for dichroic dye-doped ZnO NPs-induced HALC cell compared with NPs-induced HALC cell. Into the bargain, the order parameter (S) was also evaluated using an empirical relation among phase transition temperature and found in agreement with reported values of S (0.3-0.8) for LCs. Additionally, in analogy with solid like band theory, both cells were explored for measurement of band gap using under UV-Visible irradiations and found reduced value of same on adding the dichroic dye.
Chinky、Parul Malik、Pankaj Kumar
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Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, Punjab, India
NETL
NSTL
Springer Nature
