Abstract:

In recent years, metal halide perovskite materials have made great scientific progress in the field of light detection, photoelectric conversion, and light emission due to their excellent optical and electrical properties (such as high absorption coefficient, long carrier diffusion length, small exciton binding energy, high defect tolerance, and adjustable band gap, etc.), and low-cost solution preparation process. In recent decades, scientific research on the preparation and optimization of perovskite single crystals has been promoted driven by their advantages compared to polycrystalline perovskite films. These advantages include longer carrier lifetime, higher carrier mobility, longer diffusion length, and lower trap density. High-quality halide perovskite single crystals have been widely used in important applications such as photodetection. This review focuses on the recent advancements in photodetector technology using various forms and chemical compositions of halide perovskite single crystals, including single crystal bulks and single crystal thin films. Firstly, we systematically review the preparation and optimization progress of halide perovskite single crystals, with a focus on the latest progress in triple cations hybrid perovskite single crystals. After that, a comprehensive introduction was given to the research status of various types of photodetectors based on perovskite single crystals. Finally, the current challenges and future development prospects in the research field of halide perovskite single crystal photodetector are summarized in order to promote rapid progress and development in this field.

Key words: perovskites, single crystal, single crystal thin films, triple cations, photodetector