Material characterization of polymer controlled solution grown single crystal hybrid perovskites MAPbBr₃andFAPbBr₃for detectors of ionizing radiation

Detectors of ionizing radiation require materials with strong stopping power, low defect concentration, wide bandgap, and excellent charge mobility. Single crystal organic-inorganic perovskites (ScOIHP) have attracted recent attention as a potential detector material. Wide utilization of ScOIHP for radiation detection calls for efficient and low-cost crystal growth techniques. Here we report high-quality CH₃NH₃PbBr₃ (MAPbBr₃) and CH(NH₂)₂PbBr₃ (FAPbBr₃) single crystals grown using a polymer-controlled solution method. An extensive material characterization on the as-grown single crystals are presented including the crystal’s quality and semiconductor properties. Process improvement avenues are discussed by comparing properties of the as-grown ScOIHP with the state-of-the-art detector materials. The grown crystals are characterized for a variety of parameters using photoluminescence (room temperature and cryogenic), optical microscopy, and scanning electron microscopy. We will also provide data on the compositional uniformity via XRD, EDS and SIMS techniques. Electrical characterization of the samples is performed for IV analysis.