Synaptic Plasticity Modulation in Dion-Jacobson Perovskite Artificial Synapses Enabled by Crystallographic
Sang Heon Lee1, Min Jong Lee1, Hyungju Ahn2
1School of Electrical Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
Small (Weinheim an Der Bergstrasse, Germany)
|June 26, 2025
Summary
Dion-Jacobson perovskite artificial synapses, using formamidinium chloride, enable precise control over synaptic plasticity for neuromorphic computing. These advanced materials demonstrate high accuracy in pattern recognition and offer insights into memory formation.
Area of Science:
- Materials Science
- Neuroscience
- Computer Science
Background:
- Bridging the gap between biological synapses and artificial neural networks is crucial for advancing computing.
- Artificial synapses require materials that precisely emulate dynamic synaptic properties.
Purpose of the Study:
- To develop novel artificial synapses using Dion-Jacobson (DJ) perovskites for enhanced neuromorphic computing.
- To investigate the role of crystallographic orientation in modulating synaptic plasticity.
Main Methods:
- Incorporation of formamidinium chloride (FACl) into (PDA)(FA)n-1PbnI3n+1 (n = 2-8) perovskites to achieve vertically oriented crystallographic structures.
- Fabrication and characterization of DJ perovskite artificial synapses.
- Evaluation of synaptic properties including paired-pulse facilitation (PPF), long-term potentiation (LTP), and long-term depression (LTD).
- Artificial neural network (ANN) simulations for pattern recognition tasks.
Main Results:
- Vertically oriented crystallographic structures enhance charge transport and synaptic function control.
- DJ perovskite synapses exhibit superior linearity and symmetry in synaptic weight modulation.
- ANN simulations achieved 94.47% accuracy in pattern recognition.
- Demonstrated modeling of second-language learning mechanisms via synaptic plasticity.
Conclusions:
- DJ perovskite artificial synapses offer a promising platform for high-performance neuromorphic computing.
- Crystallographic orientation control is key to precise synaptic plasticity modulation.
- These findings advance both neuromorphic engineering and fundamental understanding of synaptic behavior.
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