Ultrahigh Spatial Resolution, Fast Decay, and Stable X‐Ray Scintillation Screen through Assembling CsPbBr3 Nanocrystals Arrays in Anodized Aluminum Oxide

Abstract A scintillation screen with ultrahigh spatial resolution, fast decay time, and high stability is the key to commercial application. Herein, a pixelated‐structure scintillation screen of CsPbBr 3 nanocrystal arrays based on anodized aluminum oxide (AAO) is reported, and its scintillation properties for X‐ray imaging are explored. It is of note that ultrahigh spatial resolution (2 µm), fast photoluminescence decay time (9 ns), and high stability (>42 d) are successfully achieved by the pixelated CsPbBr 3 ‐AAO arrays scintillation screen. Considering the decent scintillation properties and high stability, one has reason to assume that the pixelated CsPbBr 3 ‐AAO arrays scintillation screen may find an application as a new X‐ray scintillation screen.