Improved scintillation intensity of CsPbBr3 perovskite film via introducing BaLuF5: Gd/Tb nanoparticles

Abstract

Metal halide perovskites nanoparticles (PNPs) show promising application in X-ray detection and imaging. However, they exhibit poor stability, especially, the emission peak might be evidently shifted with increasing the PNPs concentration. In this work, the composites of CsPbBr3 PNPs and BaLuF5: 15Gd/15Tb NPs are used to prepare scintillation film for the first time. When fixing the PNPs content in the film, its emission center is not changed after the addition of fluoride NPs. The uniform film containing both BaLuF5: 15Gd/15Tb to CsPbBr3 is prepared. The scintillation intensity of the CsPbBr3 PNPs is enhanced owing to the radiative energy transfer process from BaLuF5: 15Gd/15Tb to CsPbBr3. Our results provide a novel route to improve the scintillation intensity, which might promote the exploration of new scintillators with high performance.