Recent Advances in Halide Perovskite Memristors: Materials, Structures, Mechanisms, and Applications

The memristor is the fourth fundamental circuit element discovered after resistors, capacitors, and inductors. Although this concept has only been proposed in 1971 and confirmed in 2008, many materials with memristive properties have been found since 1962. Halide perovskites have been widely used in solar cells, and recently it has been found that they also possess good memristive properties. Different halide perovskites have been applied to memristors, including 3D organic-inorganic hybrid perovskites, 2D organic-inorganic hybrid perovskites, all-inorganic cesium/rubidium lead halide perovskites, lead-less and lead-free perovskites, and halide perovskite quantum dots. Flexible and fiber-shaped halide perovskite memristors have been fabricated. Several resistive switching mechanisms of halide perovskite memristors have been proposed, and the relationships between halide perovskite memristors and perovskite solar cells have been discussed. Based on halide perovskite memristors, light-induced resistive switching and logic gate, high-density and cross-bar array data storage unit, and artificial synapse have been designed. Herein, recent advances in halide perovskite memristors are comprehensively and systematically reviewed. Finally, the current challenges and potential future directions in this field are discussed.