Faster response and lesser threshold voltage of strontium hardystonite (Sr-HT) nematic liquid crystal: Photoluminescence and optical study

Add time:08/09/2019    Source:sciencedirect.com

Herein, we have discussed change in dielectric and optical properties due to dispersion of Strontium hardystonite (Sr-HT) in the pure nematic liquid crystal (LC). The two different (0.5% wt./wt. and 1.0% wt./wt.) concentration of Sr-HT are dispersed in the pure nematic LC. After the dispersion of Sr-HT we have observed faster response and lower threshold voltage in comparison to pure nematic LC. The higher value of dielectric anisotropy calculated from the dielectric measurement and it has been suggested that lower voltage is required for switching of nematic molecules. The faster response and low threshold voltage will be very beneficial for application point of view used in making flat panel displays and lower power consumption devices. The UV absorbance and optical transmittance is reduced for Sr-HT dispersed nematogen. Photoluminescence (PL) spectra suggested the shifting in emission peak for Sr-HT dispersed nematogen due to different molecular interaction taking place between nematic LC and Sr-HT molecules. In addition to this Fourier Transform Infrared Spectroscopy (FTIR) for pure and Sr-HT dispersed nematogen has also been done.

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