Advances of Perovskite Single-Crystal Heterojunctions for High-Performance X-ray Detectors

Perovskite single-crystal (SC) heterojunctions have sparked great interest in enhancing the performance of optoelectronic devices due to their diverse structures and tunable compositions that benefit the low defect density and higher stability. The latest progress and future perspectives of perovskite SC heterojunctions are reviewed herein. First, we briefly introduce the fundamentals of perovskite SC heterostructures. Then, the preparation methods and the classification of perovskite SC heterostructures are discussed. Moreover, the physical mechanism and the progress in X-ray detection application of perovskite SC heterojunctions are systematically summarized. Finally, we propose a global perspective on the challenges and development of perovskite SC heterojunctions. This review summarizes the achievements of halide perovskite SC heterojunctions over the past decade, identifies their existing limitations, and offers valuable insights to guide the future development of SC heterojunctions.