爆炸冲击合成铯铅氯钙钛矿粉体

Metal halide perovskites have become a current research hotspot owing to their exceptional optoelectronic properties and significant potential application value. The elemental composition and crystal structure of perovskite material have crucial influence on its performance. To realize the preparation of novel perovskites,this paper focuses on the research of synthesizing cesium lead chloride perovskite (CsPbCl₃) under shock loading. In this study, CsPbCl₃ perovskite powder is synthesized by the shock loading of detonation-driven flyer plates under the conditions of 0. 6 - 0. 8 relative densities of powder and 14. 2-27. 9 GPa shock pressures. The characterization results of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicate that the recovered products are CsPbCl₃ perovskite powders. Experimental results also demonstrate that the shock pressure and the relative density of precursor are two key factors to the synthesis of CsPbCl₃ perovskite powder. Based on the experimental conditions and analytical characterization results, a formation mechanism of CsPbCl₃ synthesis is discussed. It is confirmed that the proper shock pressure for high-purity CsPbCl₃ powder synthesis is from 14 GPa to 17 GPa. It is also suggested that the shock synthesis method is a feasible approach for preparing difficult-to-synthesize perovskite.