Control Over Dynamic Plasticity Phenomena in Perovskite-Based Nanoparticles By Fine Tuning of Surface Ligand Architecture
摘要
Methylammonium lead bromide (MAPbBr₃) nanoparticles capped with alkylammonium ligands of varying chain length were synthesized and characterized using standard spectroscopic and microscopic techniques. Dispersed within a polymer matrix, these nanocrystals were incorporated into prototype memristive devices that exhibit tunable synaptic functionalities, such as potentiation, depression, and spike rate–dependent plasticity (SRDP). The increasing insulating character of the surface ligands enabled tunable device performance, particularly in terms of operating voltage ranges and shape of the electrical response. This ligand-dependent modulation offers a versatile platform for tailoring the electronic behavior of nanostructured perovskite-based systems. Notably, devices constructed with nanoparticle-polymer blends exhibited enhanced stability compared to conventional bulk perovskite devices. This approach offers a scalable pathway for engineering robust, adaptable information processing devices for next-generation neuromorphic computing.