Perovskite LEDs for Multifunctional Displays

Metal halide perovskites have shown great promise for a new generation of light-emitting diodes (LEDs). A unique feature of perovskites, compared with emissive materials used in other LEDs, is that they can also efficiently detect light, making it possible to develop new applications which are hardly possible for other LED technologies. By making use of this advantage, we recently develop multifunctional displays using highly photo-responsive perovskite LEDs as pixels. Our perovskite LED display can be simultaneously used as touch screen, fingerprint sensor, ambient light sensor, and image sensor without integrating any additional sensors.