POS5-1274
Flexible Multistate Vertical Organic Electrochemical Transistor Arrays for Neuromorphic Computing
Topic
S5. Polymers for Electronics and Photonics
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
INHO LEE (Ajou university)
Co-Author(s)
Abstract
Laser-patterned vertical organic electrochemical transistors (vOECTs) have recently attracted considerable attention for neuromorphic electronics owing to their intrinsic ion–electron coupling characteristics. In these devices, ionic transport within an electrolyte modulates the conductivity of an organic semiconductor channel, enabling analog conductance tuning analogous to biological synaptic plasticity. Such properties make OECTs promising candidates for energy-efficient neuromorphic computing and biointegrated intelligent systems.
Here, we report a laser-patterned vertical OECT array fabricated through a scalable maskless process. Unlike conventional photolithography-based fabrication, the laser-patterning strategy directly defines the device geometry in a single-step process, significantly simplifying fabrication while improving alignment accuracy and scalability. The resulting vertical architecture minimizes the channel length to the nanoscale, thereby enhancing ion–electron coupling efficiency and enabling highly integrated device arrays.
The fabricated array demonstrates gradual, reversible, and highly controllable multistate conductance modulation under electrical stimulation. Furthermore, the devices exhibit both short-term and long-term synaptic plasticity, which are essential for neuromorphic information processing. Excellent device uniformity and operational stability are maintained across the array, highlighting the suitability of the proposed architecture for large-scale neuromorphic integration.
These results demonstrate that laser-patterned vertical OECT arrays provide a scalable platform combining high integration density, multistate synaptic functionality, and simplified fabrication, offering significant potential for flexible neuromorphic electronics, intelligent biointerfaces, and next-generation human–machine interaction systems.
Here, we report a laser-patterned vertical OECT array fabricated through a scalable maskless process. Unlike conventional photolithography-based fabrication, the laser-patterning strategy directly defines the device geometry in a single-step process, significantly simplifying fabrication while improving alignment accuracy and scalability. The resulting vertical architecture minimizes the channel length to the nanoscale, thereby enhancing ion–electron coupling efficiency and enabling highly integrated device arrays.
The fabricated array demonstrates gradual, reversible, and highly controllable multistate conductance modulation under electrical stimulation. Furthermore, the devices exhibit both short-term and long-term synaptic plasticity, which are essential for neuromorphic information processing. Excellent device uniformity and operational stability are maintained across the array, highlighting the suitability of the proposed architecture for large-scale neuromorphic integration.
These results demonstrate that laser-patterned vertical OECT arrays provide a scalable platform combining high integration density, multistate synaptic functionality, and simplified fabrication, offering significant potential for flexible neuromorphic electronics, intelligent biointerfaces, and next-generation human–machine interaction systems.
