Current display screens are typically only used for information display, but can have a range of different sensors integrated into them for functions such as touch control, ambient light sensing and fingerprint sensing. Photo-responsive light-emitting diodes (LEDs), which can display information and respond to light excitation, could be used to develop future ultra-thin and large screen-to-body ratio screens. However, photo-response is difficult to achieve with conventional display technologies. Here, we report a multifunctional display that uses photo-responsive metal halide perovskite LEDs as pixels. The perovskite LED display can be simultaneously used as a touch screen, ambient light sensor and image sensor (including for fingerprint drawing) without integrating any additional sensors. The light-to-electricity conversion efficiency of the pixels also allow the display to act as a photovoltaic device that can charge the equipment.

当前的显示屏通常仅用于信息显示，但可以集成一系列不同的传感器，以实现触摸控制、环境光感应和指纹感应等功能。光响应发光二极管（LED）可以显示信息并对光激发做出响应，可用于开发未来超薄和大屏占比的屏幕。然而，传统的显示技术很难实现光响应。在此，我们报道了一种使用光响应金属卤化物钙钛矿 LED 作为像素的多功能显示器。钙钛矿LED显示屏可以同时用作触摸屏、环境光传感器和图像传感器（包括用于指纹绘制），而无需集成任何额外的传感器。像素的光电转换效率还使得显示器可以充当光伏器件，为设备充电。