Electrochemical regulation of graphene infrared image display based on high-efficiency lithium ions intercalation method

With the advancement of infrared modulation technologies, infrared display devices have attracted increasing attention. Previous studies have mainly focused on the response time of infrared display devices and have achieved great success. Nevertheless, owing to the restricted material properties or modulation approaches, the response time of the majority of infrared modulating devices remains trapped at level for a few seconds. In this paper, we fabricated an infrared images display device based on lithium-ion intercalated multilayer graphene (MLG). By changing the lithium-ion content and current value, we had successfully improved its response time from approximately 140,000 ms to around 6 ms.Meanwhile, its absorbance also has significant changes within 0.8–1.8 μm (∼75 %–∼25 %) and 2.5–25 μm (∼45 %–∼2 %). In addition, multi-pixel infrared display unit has been realized on a flexible substrate. The letters "N, U, and C″ were dynamically displayed continuously at 3∗3 pixels by controlling lithium-ions intercalate MLG state. Our work is expected to provide theoretical and technological support for ultrafast flexible dynamic infrared display devices.