Crystal growth of new high light yield halide perovskite scintillator RbSrI3

X-ray radiography systems are a key national security technology enabling non-invasive cargo screening. However, the scintillators currently used in these systems have limitations in performance that prompt research for new suitable materials. In this work, crystal growth, physical properties, and optical and scintillation properties of a new halide perovskite scintillator RbSrI3 were investigated for the first time. The melting point was determined to be 453 degrees C. Divalent europium and ytterbium were investigated as potential luminescent activators. Light yield and energy resolution of RbSrI3:Eu 5 mol% was 78,700 ph/MeV and 2.8 % at 662 keV, and that of RbSrI3:Yb 0.5 mol% was 24,000 ph/MeV and 4.9 % at 662 keV.