**6. Conclusion**

Metal halide hybrid perovskites are one of the most researched materials in the recent years owing to the fascinating properties they exhibit. These materials, therefore, find application in various fields. Inorganic, hybrid, organic–inorganic, 2D/3D mixed dimensional are all different types of halide perovskites that find applications in optoelectronics, photovoltaics, catalysis, etc. today. These variations come from the changes in the compositional elements in the basic structure family. The different phases exhibit peculiar properties that make them multifunctional. The crystal structure variation itself leads to changes in the properties. The changes in the electronic, optical, and electrical properties of the different types of metal halides are explored in the chapter. Ferroelectric property is mainly shown by the organic−inorganic counterparts owing to the polar nature of the organic cation. The synthesis techniques followed for the nanostructure, thin film and single crystals are varied and important as the growth of the materials and enhancement of its properties can be achieved by making changes in the synthesis procedures. The property enhancement of these materials is easily achievable by the addition of dopants or by fabricating polymer composites. These methods also help in enhancing the stability along with the properties making the extant of application of perovskite materials much wider.
