High‐Gain Ag ₂ Te/MoS ₂ Hybrid Photodetectors for Short‐Wave Infrared Imaging

Abstract

ABSTRACT Physical artificial intelligence has emerged as a pivotal component in next‐generation humanoid technologies, including advanced optical sensors, as it enables autonomous acquisition of sensory information. This study reports a high‐performance 0D/2D hybrid photodetector using a high‐gain Ag 2 Te/MoS 2 hybrid structure for visible to short‐wave infrared (SWIR) photodetection, achieved by the absorption of Ag 2 Te quantum dots in the infrared region (∼1450 nm). The Ag 2 Te/MoS 2 photodetector exhibits a high photoresponsivity of around 7.5 × 10 5  AW −1 and a specific detectivity of over 9.9 × 10 8 Jones at 1 µW/cm 2 illumination power with a 0.2 V drain bias voltage. Furthermore, depending on the gain of the photodetector, a fast response speed can also be achieved, with rise and decay times as short as 13 and 23 ms. The 0D/2D hybrid devices were successfully implemented in a 32 × 32 array format for infrared imaging, with the results demonstrating spatially resolved pattern reconstruction and real‐time photoresponse acquisition. By hybridizing quantum dots and 2D materials, the developed photodetector has broad potential applications, including use in highly integrated SWIR image sensors.