Methylhydrazinium\nLead Halide Perovskites: Effect\nof Composition and Dimensionality on Their Optoelectronic and Photodetection\nProperties

Over the past few years, lead halide\nperovskites (LHPs) in the\nform of single crystals (SCs) have been intensively investigated for\nphotodetection applications. Methylhydrazinium (MHy) is a new type\nof organic cation that can form either 2D or 3D halide perovskite\nstructures. Here, we study single crystals MHy<sub>2</sub>PbI<sub>4</sub> (2D), MHy<sub>2</sub>PbBr<sub>4</sub> (2D), MHyPbBr<sub>3</sub> (3D), and mixed-cation MA<sub>0.725</sub>MHy<sub>0.275</sub>PbBr<sub>3</sub> to determine for the first time how dimensionality and composition\naffect the photodetection properties of photoconductor-type photodetectors\nfabricated using this class of solids. The results provide a reference\nfor researchers working in the same domain by revealing the relationship\nbetween different types and structures of LHPs and their optoelectronic\nproperties, which is crucial for the further advancement of LHP-based\noptoelectronic devices.