Cs2InCl5(H2O): A moisture-stable defective double halide perovskite analogue with broadband emission

This study reports a moisture-stable direct bandgap defective double halide perovskite analogue constructed from [InCl5(H2O)]2− octahedra. The introduction of heterogeneous oxygen in the octahedra position is crucial for achieving a broadband emission and for increasing the chemical and moisture stability. These unique merits make Cs2InCl5(H2O) a promising environmentally-friendly material to achieve applications for future optoelectronic devices.