Thermally and Mechanically Stable Perovskite Artificial Synapse as Tuned by Phase Engineering for Efferent Neuromuscular Control.
basic_science · Level V
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- Record sourced from PubMed, PMID 39023921.
- Also identified by DOI 10.1021/acs.nanolett.4c02240.
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Abstract
The doping of perovskites with mixed cations and mixed halides is an effective strategy to optimize phase stability. In this study, we introduce a cubic black phase perovskite Cs<sub><i>y</i></sub>FA<sub>(1-<i>y</i>)</sub>Pb(Br<sub><i>x</i></sub>I<sub>(1-<i>x</i>)</sub>)<sub>3</sub> artificial synapse, using phase engineering by adjusting the cesium-bromide content. Low-bromine mixed perovskites are suitable to improve the electric pulse excitation sensitivity and stability of the device. Specifically, the low-bromine and low-cesium mixed perovskite (<i>x</i> = 0.15, <i>y</i> = 0.22) annealed at 373 K allows the device to maintain logic response even after 1000 mechanical flex/flat cycles. The device also shows good thermal stability up to temperatures of 333 K. We have demonstrated reflex-arc behavior with MCMHP synaptic units, capable of making sensory warnings at high frequency. This compositionally engineered, dual-mixed perovskite synaptic device provides significant potential for perceptual soft neurorobotic systems and prostheses.