Lasing from halide perovskites

Organic-inorganic halide perovskites (e.g., CH3NH3PbI3) possesses exceptional optoelectronic properties for photovoltaics. Amazingly, this material system also has outstanding optical gain properties ideal for lasing applications. Two years had elapsed since the discovery of amplified spontaneous emission and lasing from these perovskite thin films and nanostructures. Herein, we briefly review its development, the state-of-the-art and the prospective outlook of this new lasing medium.