Antimony (V) Complex Halides: Lead-Free Perovskite-Like Materials for Hybrid Solar Cells

Using bromoantimonate (V) (N-EtPy)[SbBr6] as an example, it is demonstrated that ABX(6) compounds can form perovskite-like 3D crystalline frameworks with short interhalide contacts, enabling advanced optoelectronic characteristics of these materials. The designed compound shows an impressive performance in planar junction solar cells delivering external quantum efficiency of approximate to 80% and power conversion efficiency of approximate to 4%, thus being comparable with the conventional perovskite material MAPbBr(3). The discovery of the first perovskite-like compound ABX(6) exhibiting good photovoltaic performance opens wide opportunities for rational design of novel perovskite-like semiconductor materials for advanced electronic and photovoltaic applications.