Improving Nonvolatile Properties of Conjugated Polymer Based Synaptic Devices by Enhancing Anion Interaction Through Polarity Control
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Recently, the need for a synaptic device that mimics the human brain and can effectively solve large-scale computations such as chat GPT and cloud services has been raised, and various synaptic devices such as memristors and memtransistors have been actively researched. Among them, electrolyte-gated transistors(EGTs), which can be operated at low operating voltage, are attracting attention. Here, we fabricated a synaptic device by controlling the polarity of the backbone chain by adjusting the side chain of the conjugated polymer. The fabricated device realised the brain's short-term/long-term plasticity(STP/LTP) and also implemented synaptic behaviours such as paired-pulse facilitation, high-pass filtering, and long-term potentiation/depression(LTP/LTD). This work may provide a new architecture for the next generation of neuromorphic systems.