Efficient X-ray Attenuation Lead-Free AgBi<sub>2</sub>I<sub>7</sub> Halide Rudorffite Alternative for Sensitive and Stable X-ray Detection
Shujie Tie, Wei Zhao, Wei Huang, Deyu Xin, Min Zhang, Zhou Yang, Jidong Long, Qi Chen, Xiaojia Zheng, Jianguo Zhu, Wen‐Hua Zhang
Abstract
The poor attenuation capability of high-energy X-ray photons hinders the application of X-ray detectors in medical and astrophysical areas. Halide-based perovskites are promising candidates for X-ray detection because of their improved sensitivity. However, their inferior attenuation coefficient is still unsatisfactory for broadband X-ray detection. Here, a new kind of X-ray detection material, AgBi2I7 rudorffite single crystal (SC), is prepared and applied in X-ray detection for the first time, and it shows a higher attenuation coefficient than halide-based perovskites, commercialized a-Se, and the currently outstanding Cd0.9Zn0.1Te (CZT). The AgBi2I7 rudorffite SCs possess outstanding electric properties and excellent stability. AgBi2I7-SC detectors demonstrate a limit of detection (LoD) of 72 nGyair s–1 and a sensitivity of 282.5 μC Gyair–1cm–2 to X-rays and show only a slight performance degradation after ontinuous X-ray irradiation with a total dose of 58 Gyair. This work opens up a new perspective and broad opportunities for halide rudorffite in X-ray detection.