Publication date: 21st July 2025
The hysteresis observed in perovskite solar cells sparked the interest in employing perovskites for memristive devices. Since the early reports, switching has been observed in all kinds of perovskite and perovskite-inspired materials sandwiched between metal electrodes. These devices have shown volatile as well as non-volatile behavior dependent on the system and the applied voltages. The switching has been explained by interfacial effects as well as filament formation, where various ionic species from the perovskite as well as the metal electrodes might be involved.
In this talk we will have a closer look at highest-performance perovskite memristors, which show on/off ratios larger than 1010 and excellent retention and endurance. Using various in-operando measurements such as infrared thermography, confocal photoluminescence, and electron microscopy, we elucidate formation and switching process in our memristors. Based on these insights, we present a novel optical patterning approach, which allows to down-scale the memristor area. Given the huge on-off ratio of these memristors, an outlook is given on other potential applications beyond neuromorphic computing.
This research received funding from the European Union's Horizon 2020 research and innovation program under grant agreement no. 851676 (ERC StGrt).
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