Kocakulah, GulsumKoysal, Oguz2024-08-232024-08-2320240925-34671873-1252https://doi.org/10.1016/j.optmat.2024.115101https://hdl.handle.net/20.500.12684/14284Nanomaterial doped cholesteric liquid crystal (CLC) composites have become important due to the improvement of their physical properties recently. In this study, the change of Indium Phosphide/Zinc Sulfide (InP/ZnS) quantum dot (QD) concentration in the optical, electro-optical, and dielectric parameters of CLC was examined. Voltage dependent transmittance and response time parameters were determined by the electro-optical switching method. Moreover, wavelength dependent absorbance and transmittance values of samples were investigated Ultraviolet/Visible (UV/VIS) spectroscopy. Dielectric parameters were examined with dielectric spectroscopy. Considering the experimental results, threshold voltage (Vth), response time (tau R), and optical band gap (Eg) values of CLC decreased with InP/ZnS QD contribution. On the other hand, dielectric constants (epsilon ' and epsilon ') and ac conductivity (sigma ac) values increased with InP/ZnS QD contribution at low frequencies. Furthermore, voltage dependent transmittance data indicated that samples were transparent in the absence of voltage (planar -state) due to transmission of light and opaque in the presence of certain voltage (focal conic -state) due to scattering of light. Results show that InP/ZnS QD causes considerable changes in the physical parameters of CLC and the produced samples can be used in the technological devices, especially light shutters.en10.1016/j.optmat.2024.115101info:eu-repo/semantics/closedAccessCholesteric liquid crystalDielectric constantOptical band gapTransmittanceQuantum dotWalled Carbon NanotubesFrequencyBehaviorVoltageDisplayArticle1492-s2.0-85185892782WOS:001188473500001Q1N/A