Advanced Design of Light‐Assisted Nanogenerators with Multifunctional Perovskites

Abstract Enormous efforts are invested in developing multi‐energy harvesting technology with simple configuration and high conversion efficiency, and light‐assisted nanogenerators are considered a promising solution. Multifunctional perovskites are explored for this light‐assisted nanogenerator, owing to its powerful platform characteristics for integrating multiple energy conversion mechanisms and multi‐effects coupling phenomenon. Therefore, with the rapid progress of this emerging field, a timely and comprehensive review of this light‐assisted nanogenerator is urgently needed for updating the fundamental understanding of coupling mechanism and material‐device‐performance relationship. In this review, recent advancements of the perovskite light‐assisted nanogenerator with their advanced designs are presented. First, the fundamental properties co‐existing in perovskites are briefly introduced, as well as some emerging effects (e.g., flexoelectric). Subsequently, the further coupling mechanism between photovoltaic effect and other energy conversion effects in different light‐assisted nanogenerator are discussed in categories. And the output characteristics and potential application of various coupled devices are systematically described from the perspective of perovskites selection and device engineering. Finally, some perspectives on existing challenges and further development for light‐assisted nanogenerator are put forward, with the aim to provide useful guidance for the design of advanced devices.