Programmable Photovoltaics of Metal-Oxide-Semiconductor Junction

Programmability, fundamental to the computing of electronic systems, is traditionally achieved in processing and memory modules. Recently, the emergence of in-sensor computing allows the programmability of the sensing modules and the process of raw data upon the sensor edge, which reduces data transport and energy consumption. Here, a programmable photodetector module with a tunable photoelectric response based on molybdenum sulfide (MoS₂) metal-oxide-semiconductor (MOS) junction for visible detection is reported. The sensor takes advantage of the tunable band alignment at the MOS junction and generates an adjustable or even reversible out-of-plane photovoltaic effect with high efficiency. This work provides new device configurations to architect the programmability of the photodetectors, and pave the way toward in-sensor computing at the application edge.