Wafer-scale integration of two-dimensional perovskite oxides towards motion recognition

Two-dimensional (2D) perovskite oxides show promise for advanced optoelectronic systems, particularly in high-performance photodetection. However, challenges in synthesis and defect chemistry hinder their performance and large-scale integration. This work reports wafer-scale integration of highly oriented 2D perovskite oxide nanosheets using a charge-assisted oriented assembly film-formation process. The resulting devices exhibit high photosensitivity, fast response speed, and are integrated into a flexible 256-pixel device for efficient motion recognition with >99.8% accuracy. This approach provides a pathway for large-area fabrication and utilization of 2D perovskite oxides in advanced optoelectronics.

Ming Deng, Ziqing Li, Shiyuan Liu, Xiaosheng Fang, Limin Wu