Current displays are typically used solely for information display, but they can integrate a range of different sensors for functionalities such as touch control, ambient light sensing, and fingerprint sensing. Light-responsive LEDs can display information and respond to light excitation, making them suitable for the development of future ultra-thin and large screens with a body-to-screen ratio. However, achieving light responsiveness is challenging with traditional display technologies. This report presents a multifunctional display using light-responsive metal halide perovskite LEDs as pixels. The perovskite LED display can simultaneously function as a touchscreen, ambient light sensor, and image sensor (including fingerprint sensing), without the need to integrate any additional sensors. The photoelectric conversion efficiency of the pixels also allows the display to act as a photovoltaic device, capable of charging the device.
Original:
https://doi.org/10.1038/s41928-024-01151-x