POS5-1613
Tunable Synaptic Plasticity in p-n Type OMIECs for Vertical Organic Electrochemical Diodes via Dopant-Ion Size Modulation
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
ALEXANDER MAURICIO TIPAN QUISHPE (Gwangju Institute of Science and Technology)
Co-Author(s)
Abstract
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 investigate the influence of vertical OECD architecture on synaptic plasticity in both p-type and n-type OMIECs. By applying tailored input signals and stimulation protocols, we demonstrate fundamental neuromorphic functions in p and n type OMIECs. Both liquid and solid-state electrolytes were evaluated, revealing that ionic size significantly influences long-term potentiation/depression cycles and retention behavior. Moreover, the solid-state electrolyte enhanced long-term operational stability and improved the linearity of synaptic weight updates. This highlights the tunability of synaptic responses through ionic control. These results highlight the tunability of synaptic responses through ionic control and demonstrate vertical OECDs based on p-n-type OMIECs as a scalable platform for polymer-based neuromorphic computing.
