Önsal, Gülnur2023-03-222023-03-2220220361-52351543-186Xhttps://doi.org/10.1007/s11664-022-09620-9https://hdl.handle.net/20.500.14034/729In this study, dielectric and electro-optic properties of 4-pentyl-4 '-cyanobiphenyl (5CB) nematic liquid crystal (LC) and different concentrations of nickel (II) phthalocyanine (Ni(II)Pc) and cadmium selenide sulfide/zinc sulfide (CdSeS/ZnS) quantum dot (QD)-doped LC have been investigated in dark and ultraviolet (UV) illumination. Some important dielectric parameters such as the real and imaginary part of the complex dielectric constant (epsilon ' and epsilon ''), relaxation frequency (f(R)), and relaxation time (tau) have been determined. The output of the study shows that Ni(II)Pc and CdSeS/ZnS contribution and UV illumination improved the dielectric properties. Optical band gap (E-gap) values of all samples have been obtained using the UV spectroscopy technique. The E-gap value decreased after dispersion of Ni(II)Pc and CdSeS/ZnS in the pure LC. The results may be beneficial for the design of new optoelectronic devices.eninfo:eu-repo/semantics/closedAccessLiquid crystalphthalocyaninequantum dotdielectric propertieselectro-optic propertiesDirector Relaxation FrequencyElectrical-ConductivityEnhancementCompositesArticle10.1007/s11664-022-09620-951738203830Q3WOS:0007876541000042-s2.0-85128847098Q3