Two‐Dimensional Piezoelectric Nanomaterials for Nanoelectronics and Energy Harvesting

Smart materials, especially piezoelectric materials, have gained popularity over the last two decades. Two‐dimensional (2D) piezoelectric materials exhibit attributes including great flexibility, ease of workability, extensive surface area, and many active sites, indicating significant potential for future practical applications. However, 2D materials have bottlenecks such as poor stability against high‐impact forces and unsatisfactory manufacturing techniques. This review examines cutting‐edge research advancements on 2D piezoelectric materials and their applications in new‐generation devices. First, the current review discusses the structure and working mechanism, synthesis methods, and characterization techniques of 2D piezoelectric materials. Then, a thorough review of the piezocatalysis technique is provided, analyzing the applications of 2D piezoelectric materials in various applications, including nanogenerators, nanosensors, field‐effect transistors, photodetectors, and solar cells. In conclusion, the main obstacles and opportunities of 2D piezoelectric materials and their applications in the future are examined. We believe that this comprehensive review will make significant contributions to the qualitative and quantitative research of the production of commercial advanced functional devices and their large‐scale integrated applications.