Perovskite Thin Single Crystal for a High Performance and Long Endurance Memristor

Abstract

Metal halide perovskites (MHPs) exhibit electronic and ionic characteristics suitable for memristors. However, polycrystalline thin film perovskite memristors often suffer from reliability issues due to grain boundaries, while bulk single‐crystal perovskite memristors struggle to achieve high LRS/HRS ratios. In this study, a single crystal memristive device utilizing a wide bandgap perovskite is introduced, MAPbBr3, in a high surface/thickness configuration. This thin single crystal overcomes these challenges, exhibiting a remarkable LRS/HRS ratio of up to 50 and endurance of 103 cycles, representing one of the highest reported values to date. This exceptional stability enables to analyze the electroforming process and LRS through impedance spectroscopy, providing insights into the underlying operational mechanism. As far as it is known, this is the first reported thin single‐crystal MHP memristor device and the first time that the electroforming process is recorded through impedance spectroscopy. This device's outstanding stability and performance position it as a promising candidate for high‐density data storage and neuromorphic applications.

Orthorhombic lead-free hybrid perovskite CH3NH3SnI3 under strain: an ab initio study

“…In recent years, the advent of perovskite solar cells based on hybrid halide perovskites has revolutionized the eld of photovoltaic (PV) solar cells. 1,2 In particular the synthesis [3][4][5] of lead-free methylammonium tin iodide CH 3 NH 3 SnI 3 opened new avenues for photovoltaic materials. To be efficiently used in PV applications, a semiconductor material should have a high light absorption (∼10 5 cm −1 for >1.4 eV).…”

Hysteresis in memristors produces conduction inductance and conduction capacitance effects

“…1a, for positive voltages. 36–42 In contrast, in the reset cycle, the current decreases and the hysteresis is capacitive, making a clockwise loop, see Fig. 1a at negative voltages.…”

“…The inductive feature of impedance spectroscopy has been observed in different types of all-solid memristors. 42–46 Fig. 2 shows the huge inductive arcs of a halide perovskite memristor.…”

“…, the inertia of electrons in the Drude model. 66 There are many processes that can potentially cause the inductive delay, like ionic motion in perovskite single crystals, 42 and sometimes they are not known in advance. However, the general feature of these systems is that the inductor relates to a delayed conduction process.…”