All-Inorganic Metal Halide Perovskite Nanostructures: From Photophysics to Light-Emitting Applications

All-inorganic metal halide perovskite nanostructures (IHPNs) have sparked intense research interest by virtue of their superior optical properties and their cost-effective synthesis. Since the first report in 2015, striking development of IHPNs has been witnessed in terms of fabrication strategies, optical characterization, and optoelectronic applications. Here, a brief survey of the mainstream fabrication routes is given. The emphasis is placed on the understanding of the photophysics of IHPNs, including the electronic structures, steady-state and transient absorption and emission, nonlinear optical properties, and representative exotic photophysical phenomena. Afterward, the light-emitting applications of IHPNs in lasers and light-emitting diodes are summarized. Finally, the challenges and a perspective of the future development of IHPNs are presented.