Semiconducting Organic–Inorganic Hybrid Material with Distinct Switchable Dielectric Phase Transition

Hybrid materials such as CH 3 NH 3 PbI 3 have led to significant attention because of their great properties and promising potential applications in photovoltaic, optoelectronic devices, and sensing. However, there is a huge challenge to realize the dielectric switching/ferroelectricity and semiconducting attribute for these materials simultaneously. Modifying the halogen/metal and even controlling the dimensionality of the inorganic framework provide the possibility to obtain new or high-performance functional materials. Here, we designed a hybrid compound, [(CH 3 ) 3 NOH] 2 BiCl 5, which shows remarkable dielectric switching properties at T c = 183.5 K and semiconducting behavior with an optical band gap of ∼3.225 eV. Experimental analysis revealed that the synergistic effect of microstructure of organic cations and inorganic frameworks contributes to the multifeatured. The implementation of switching and semiconducting properties in the material has essential significance for expanding research on hybrid materials and the development of dielectric-optoelectronic integration devices.