Optical and electrical studies on the semi-conductor compound for the photovoltaic applications

Abstract In the last few years, hybrid organic–inorganic material draws attention due to their potential applications in the optoelectronic and photovoltaic fields. These photovoltaic materials draw such a great deal of attention that they are marching towards commercialization thanks to their excellent optical properties, high-power conversion efficiency, and low processing cost. In this work, our central focus is upon the optical and electrical properties of the [(CH3)4P][FeCl4] compound. X-ray investigation demonstrates that this compound crystallizes in the noncentrosymmetric space groups P63mc. The optical measurements proved that this sample is a semiconductor with an indirect bandgap gap equal to 1.75eV. Recent studies have proposed that the indirect gap is due to the Rashba spin–orbit coupling. Besides, the electrical properties suggesting the semiconducting behavior, which is in good agreement with the optical study. These excellent results definitely present a path to high-power conversion efficiency in a two-junction device such as the perovskite-perovskite tandem solar cells.