Exploring the Potential of Two-Dimensional Bismuth-Copper Hybrid Double Perovskites for Memristor Applications

Hybrid double perovskites (HDPs) have attracted considerable attention due to their potential in optoelectronics. However, the exploration of their properties for memristor devices has not yet been touched. In this study, we introduce a novel two-dimensional HDPs, (H2MPP)2BiCuI8, where H2MPP = 1-methylpiperidinium-4-amine, characterized by its structured layering, narrow bandgap of 1.65 eV, and enhanced stability. More importantly, this HDPs was utilized as a functional layer to prepare a memristor device with an Ag/(H2MPP)2BiCuI8/ITO sandwich structure, which exhibits pronounced RS behavior. In particular, the device exhibits a gradual increase in conductance, followed by a distinct transition at voltages above approximately 0.37 V. Building on this observation, we revealed that the charge conduction mechanism is primarily driven by space charge limited current (SCLC) model, which provides significant insights into charge transport dynamics in HDPs memristors. We believe that this work will provide useful information for the development of high-performance HDPs memristor devices.