“…The study area is now more focused on organic–inorganic materials, as they have gained significant interest and become an essential component due to their new physicochemical features. − Aside from being a brand-new area of basic study, they also offer new opportunities for applications in various industries, including solid electrolytes, optics, biomedicine, and catalysis. − Additionally, they are becoming more significant in energy storage, flash memory technology, and optoelectronics applications such as lasers and smart windows. − However, optical sensing is one area where metal halide perovskite single crystals excel. They are excellent for converting light signals into electrical ones, acting as high-efficiency photodetectors, because of their high responsivity and specific detectivity. , Due to their numerous physical and chemical characteristics, such as piezoelectricity, ferroelectricity, luminescence, and photocatalysis, complexes with the chemical formula A 2 MX 4 (A = organic cation, M = transition divalent metal ion, X = halide ion) have attracted considerable interest among hybrid materials. , Particularly, hybrid compounds based on cadmium halide have drawn interest in particular due to the many coordination topologies and structural flexibility of the Cd 2+ ion. , During the construction of novel cadmium-based compounds, organic templates are important in establishing their structures and properties. At the same time, the concentration, size, charge density, and crystal packing of cations, as well as the metal’s properties, have a considerable impact on the anion component’s size and dimensions.…”