Tunable Synaptic Plasticity in Vertical Organic Electrochemical Diodes via Dopant Ion Size Modulation
발표자
Alexander Mauricio Tipan Quishpe` (Gwangju Institute of Science and Technology)
연구책임자
윤명한 (광주과학기술원)
초록
내용
Organic mixed ionic-electronic conductors (OMIECs) are key materials in organic electrochemical transistors (OECTs) and neuromorphic devices due to their dual ion-electron transport capabilities. While OECTs have been widely studied for emulating synaptic behavior, organic electrochemical diodes (OECDs) offer a promising alternative architecture for neuromorphic computing. In this study, we present the impact of a vertical OECD structure on synaptic plasticity. By applying tailored input signals and stimulation protocols, we demonstrate fundamental neuromorphic functions. Both liquid and solid-state electrolytes were evaluated, revealing that ionic size significantly influences long-term potentiation/depression and retention behavior. This highlights the tunability of synaptic responses through ionic control. These vertical OECDs exhibit promising synaptic properties and provide a scalable path forward for polymer-based neuromorphic computing platforms.