Metal Halide Perovskite Light-Emitting Devices for Optical Communications: A Spotlight on Speed, Brightness, Wavelength Tunability, Bidirectionality, and Integration

Metal halide perovskites are an emerging class of nonepitaxial semiconductors that have garnered the attention of the photovoltaic and light-emitting-device (LED) research communities due to their remarkable optoelectronic properties and wide-wavelength tunability. In addition to displays and lighting, recent studies have shown the promise of perovskite LEDs in other applications such as optical communications. In this Spotlight on Applications paper, we focus on the uniqueness and recent progress of perovskite light emitters and their applications in optical communications. We spotlight the progress of their operational speed, light-emitting brightness, wide-wavelength tunability, bidirectional communication, and feasibility of monolithic integration with silicon complementary-metal-oxide-semiconductor technology. We believe that metal halide perovskites are an important class of materials that hold the potential to revolutionize the next generation of low-cost, high-performance communication links in both free space and on-chip optical interconnect applications.