High-Gain Ag<sub>2</sub>Te/MoS<sub>2</sub> Hybrid Photodetectors for Short-Wave Infrared Imaging.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41860741.
- Also identified by DOI 10.1002/adma.202520984 and PMC identifier 13088215.
- Licence recorded as CC BY-NC-ND.
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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<sub>2</sub>Te/MoS<sub>2</sub> hybrid structure for visible to short-wave infrared (SWIR) photodetection, achieved by the absorption of Ag<sub>2</sub>Te quantum dots in the infrared region (∼1450 nm). The Ag<sub>2</sub>Te/MoS<sub>2</sub> photodetector exhibits a high photoresponsivity of around 7.5 × 10<sup>5</sup> AW<sup>-1</sup> and a specific detectivity of over 9.9 × 10<sup>8</sup> Jones at 1 µW/cm<sup>2</sup> 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.