[(CH3)3S]2BiBr5.DMSO: A Halide Perovskite-Like Compound Based on Sulfonium and Having a Strong Solvent-Metal Interaction

Abstract

Population expansion and increased material comfort have led to a persistent demand for energy, which has motivated the quest for alternative renewable energy sources. In this regard, due to their good optoelectronic properties such as an appropriate band gap, high absorption coefficient, and low exciton binding energy lead-based metal halide perovskites are a subject of ongoing research. These materials have the potential to replace conventional inorganic semiconductors due to their low cost, high efficiency, and ease of synthesis and processing. Unfortunately, these materials cannot be used in common applications due to the hazardous nature of the lead. Consequently, a great deal of work has gone into the hunt for lead-free halide perovskites that have exceptional power conversion efficiency. One family of lead-free halide perovskites with promising photovoltaic characteristics is Sb/Bi-based perovskites. Furthermore, the stability and structural flexibility of these halide perovskites can be improved by reducing their dimensionality. A broad variety of cations and anions can be accommodated by the 0D hybrid perovskite-like structure, producing a diversified family of materials with a range of electrical characteristics. We give a summary of the synthesis of a novel hybrid 0D halide perovskite-like compound using organic cations based on sulphur in this abstract. The single crystal X-ray diffraction confirms the structure of 0D halide perovskite [(CH3)3S]2BiBr5.DMSO has a triclinic P1̅ space group and it contains isolated BiBr5(DMSO) units that have a strong solvent-metal interaction as building blocks.[1] The compound is confirmed through several spectroscopic methods.