X‐Ray Real‐Time Imaging and Delayed Imaging from Lead‐Free Perovskite Scintillators

Abstract X‐ray detection is vital in various fields such as medical imaging, security screening, and materials analysis. However, to meet the diverse detection requirements across different scenarios, current scintillators used for X‐ray detection encounter challenges in both immediate and delayed radiation detections. In this work, flexibly controlling trap distribution through extra ions doping into Cs₂NaTbCl₆ lead‐free perovskites presents a promising avenue for addressing these challenges and advancing X‐ray dose detection capabilities across diverse scientific domains. By doping Sb³⁺ ions into the Cs₂NaTbCl₆ host, the traps are significantly passivated through improved crystallinity, resulting in the suppression of afterglow behaviors and endowing the high‐resolution real‐time dynamic X‐ray detection. Additionally, the incorporation of Mn²⁺ into the Cs₂NaTbCl₆ matrix causes significant lattice distortion, leading to increased concentrations of both shallow and deep traps, effectively boosting delayed X‐ray detection efficiency. This work may provide an effective strategy for constructing efficient scintillators for the realization of multi‐environmental X‐ray imaging.