Abstract
In this article, bistable cholesteric liquid crystal (CLC) light shutters have been fabricated and the effect of dichroic dye on their morphological and electro-optical properties was studied. Experimentally, two different sample cells were prepared for pure CLC and 0.5 wt% dichroic dye (azo orange 3) doped CLC. The morphological behaviour of bistable CLC light shutters observed in transmissive and scattering modes represents planar and focal-conic (FC) states on applied voltages under high and low frequencies, respectively. The voltage-transmission and absorbance characteristics were examined and found the operating voltage lowered with the doping of dichroic dye in CLC. Moreover, dye doped CLC light shutter showed the higher stabilization rate (SR) for planar state along with better contrast ratio (CR) compared with pure CLC light shutter. In addition, phase transition studies of pure and dye doped CLCs have been discussed.
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