Login / Signup

Enhancement of Synaptic Characteristics Achieved by the Optimization of Proton-Electron Coupling Effect in a Solid-State Electrolyte-Gated Transistor.

Dong-Gyu JinSeung-Hwan KimSeung-Geun KimJune ParkEuyjin ParkHyun-Yong Yu
Published in: Small (Weinheim an der Bergstrasse, Germany) (2021)
Presently, the 3-terminal artificial synapse device has been in focus for neuromorphic computing systems owing to its excellent weight controllability. Here, an artificial synapse device based on the 3-terminal solid-state electrolyte-gated transistor is proposed to achieve outstanding synaptic characteristics with a human-like mechanism at low power. Novel synaptic characteristics are accomplished by precisely tuning the threshold voltage using the proton-electron coupling effect, which is caused by proton migration inside the electrolyte. However, these synaptic characteristics are degraded because traps at the interface of channel/electrolyte disturb the proton-electron coupling effect. To minimize degradation, the oxygen plasma treatment is performed to reduce interface traps. As a result, symmetric weight updates and outstanding synaptic characteristics are achieved. Furthermore, high repeatability and long-term plasticity are observed at low operating power, which is essential for artificial synapses. Therefore, this study shows the progress of artificial synapses and proposes a promising method, a low-power neuromorphic system, to achieve high accuracy.
Keyphrases
  • solid state
  • electron transfer
  • ionic liquid
  • body mass index
  • prefrontal cortex
  • physical activity
  • endothelial cells
  • room temperature
  • ion batteries
  • combination therapy
  • pluripotent stem cells