The article by Sutherland and Sargent discusses the potential of perovskite materials in photonic devices, particularly in achieving electrically-driven lasers. Perovskites, with their high quantum yields, large charge carrier mobilities, and high absorption and gain coefficients, show promise for light emission and lasing applications. The authors review recent progress in perovskite electroluminescent diodes and optically pumped lasers, highlighting the benefits of perovskite materials such as tunable bandgaps, low Urbach energy, minimal Stokes shift, and high charge carrier mobility. They also discuss the challenges in achieving continuous-wave and electrically-driven lasing, including heat management and stability under high injection conditions. The article concludes by emphasizing the potential of perovskites as a low-cost alternative to epitaxial III-V compound semiconductors for optoelectronic devices.The article by Sutherland and Sargent discusses the potential of perovskite materials in photonic devices, particularly in achieving electrically-driven lasers. Perovskites, with their high quantum yields, large charge carrier mobilities, and high absorption and gain coefficients, show promise for light emission and lasing applications. The authors review recent progress in perovskite electroluminescent diodes and optically pumped lasers, highlighting the benefits of perovskite materials such as tunable bandgaps, low Urbach energy, minimal Stokes shift, and high charge carrier mobility. They also discuss the challenges in achieving continuous-wave and electrically-driven lasing, including heat management and stability under high injection conditions. The article concludes by emphasizing the potential of perovskites as a low-cost alternative to epitaxial III-V compound semiconductors for optoelectronic devices.