MAPbX3 Perovskite Single Crystals for Advanced Optoelectronic Applications: Progress, Challenges, and Perspective

Abstract Perovskite single crystals have garnered significant attention due to their impressive properties in optoelectronic applications, including long carrier diffusion lengths, low trap‐state densities, and enhanced stability. Methylamino lead halide perovskite (MAPbX 3 , where X is a halogen such as Cl, Br, or I) is a notable example of a metal halide perovskite with desirable properties and ideal cubic perovskites with a tolerance factor between 0.9 and 1.0. MAPbX 3 has adjustable bandgap, high thermal and chemical stability, and excellent light absorption capacity. Here the unique characteristics of MAPbX 3 , including molecular structure, optical absorption properties, and carrier transport of MAPbX 3 single crystals are summarized. Universal growth technologies for MAPbX 3 single crystals, including inverse temperature crystallization, anti‐solvent evaporation crystallization, solvent evaporation method, and single‐crystalline thin film, including epitaxial method and space limiting method, are briefly introduced. Additionally, a comprehensive review of MAPbX 3 single crystals in various optoelectronic device applications, including photodetectors, X‐ray detectors, light‐emitting diodes, lasers, and solar cells is mainly discussed. Finally, the current challenges and future prospects of the large‐scale preparation and growth of MAPbX 3 single crystals are put forward. With the continuous progress of photoelectric technology, more innovative photoelectric applications in the future are expected to bring more convenience and progress.