Performance of ultraviolet photodetectors based on low dimensional metal halide CsAgBr2

The discovery of lead-free low-dimensional metal halides has provided a viable approach for developing air-stable and environmentally friendly optoelectronic devices. This study presents the low-temperature preparation of lead-free CsAgBr 2 single crystals, along with a detailed structural and stability characterization. It also reveals their initial application in ultraviolet photodetectors. These crystals have a low-dimensional crystal structure and exceptional chemical stability, allowing for long-term storage under ambient conditions. A comprehensive characterization of CsAgBr 2 single crystals was carried out using X-ray diffraction and optical absorption measurements to determine their fundamental properties. The material exhibits strong ultraviolet (UV) light absorption, and the fabricated photodetectors demonstrate excellent UV detection performance. These features demonstrate the potential of one-dimensional all-inorganic CsAgBr 2 as an eco-friendly, cost-effective, and the performance of UV photodetector.