X-Ray-Activated Long Afterglow Double-Perovskite Scintillator for Detection and Extension Imaging

摘要

X-ray flat-panel detectors are widely used for nondestructive detection ofinternal information in medical radiography and industrial applications.However, a persisting challenge is the application of radiography on highlycurved 3D objects to realize flexibility and information storage for thefabrication of flexible large-area X-ray detectors. This study demonstrates ahalide-based double perovskite Cs_2Na_(0.9)Ag_(0.1)LuCl_6:Dy~(3+) by a hydrothermalreaction. The as-prepared crystals exhibit afterglow features through aco-doping strategy of Dy~(3+) and Ag~+ ions. The double perovskite material withdoping modification exhibits excellent scintillation properties with highsensitivity, low detection limit, and high radiation stability. In addition, flexiblescintillator detectors are fabricated with an area of 8.0 × 6.0 cm~2 by theblade-coating strategy, which has a high spatial resolution of 11.2 lpmm~(?1)@MTF = 0.2. Based on the long afterglow properties, theCs_2Na_(0.9)Ag_(0.1)LuCl_6:Dy~(3+) flexible film exhibits thermoluminescence afterturning off the X-ray, thereby having strong potential for X-ray imaging ofnonflat and irregular objects.