Direct X-ray Detectors Based on Halide Perovskites

In the last decade, there has been progress in the efficiency of halide-perovskite-based photovoltaics. The combination of unique physical and chemical properties of these materials, such as the strong absorption of X-ray quanta due to the presence of heavy elements (Cs, Pb, Bi, and I) in their composition, significant bulk resistivity, a tunable band gap, and compatibility with integrated circuits, arouse interest in their use in fields involving X-ray radiation. This review discusses the basic operating principles and architecture of direct X-ray detectors. Their key characteristics are discussed, and the advantages of perovskite X-ray detectors compared to existing commercial analogues are described. Ways to optimize the characteristics of perovskite X-ray detectors are considered.