Controllable Synthesis of 0D/3D Perovskite Heterostructure for High-Performance and Stable X-Ray Detection Devices

Despite the impressive optoelectronic performance, perovskite-based detectors are poorly stable under operation, failing by far the market requirements. Various technological approaches have been proposed to overcome the instability problem caused by the migration of halide ions, which, while delivering appreciable incremental improvements, are still far from a market-proof solution. Here, We demonstrate that a zero-dimensional PEA₂ZnI₄ induces more robust surface passivation on 2D perovskite single crystal and stronger n–N isotype two-dimensional/zero-dimensional heterojunctions than its lead-based counterpart. The 0D/2D forms an exceptional gradually-organized multi-dimensional interface that yields up to 30% external quantum efficiency which 8 % higher than 2D perovskite device. Our device maintains 100 % initial efficiency after 1000 on-off cycles and after >70 hours under continuous illumination of 178.7 μGy/s and an applied voltage of 10V. In addition, the unencapsulated device exhibited zero performance loss under normal measured and storage conditions (temperature: 25 ^oC, humidity: 20 to 60%) in 2 months. Our findings expand the material library for low-dimensional interface engineering and open an opportunity for the timely commercialization of perovskite x-ray detectors.