High-Gain Ag₂Te/MoS₂ Hybrid Photodetectors for Short-Wave Infrared Imaging

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 Ag₂Te/MoS₂ hybrid structure for visible to short-wave infrared (SWIR) photodetection, achieved by the absorption of Ag₂Te quantum dots in the infrared region (∼1450 nm). The Ag₂Te/MoS₂ photodetector exhibits a high photoresponsivity of around 7.5 × 10⁵ AW⁻¹ and a specific detectivity of over 9.9 × 10⁸ Jones at 1 µW/cm² 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.