Black arsenic photodetector with rapid response at room temperature and exceptional dual-band light response

https://phys.org/news/2024-05-scientists-black-arsenic-visible-infrared.html

"high carrier mobility, dependent on layer thickness, visible and IR photoconductive, n-type depletion-mode field effect transistor, good Ohmic contact... peak photoresponsivity 387.3 mA·W−1 at a near-IR wavelength of 825 nm without the need for an external bias, and achieved a high detectivity of 1.37×108 Jones. The response mechanism across the visible to infrared spectrum is primarily attributed to the photoconductive effect... high-speed optoelectronics, room-temperature broadband photodetection"