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High-Density Artificial Synapse Array Consisting of Homogeneous Electrolyte-Gated Transistors.

Jun Li1,2,3, Yuxing Lei1, Zexin Wang1

  • 1School of Material Science and Engineering, Shanghai University, Jiading, Shanghai, 201800, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 29, 2023
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Summary

This study introduces a novel lateral-gate structure for high-density integration of electrolyte-gated transistors (EGTs) in artificial synapse arrays. This advancement enables efficient neuromorphic computation and image processing with high accuracy.

Keywords:
Photo-Lithographyartificial synapse arrayelectrolyte-gated transistorslateral-gatemetal-organic framework

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Area of Science:

  • Materials Science
  • Neuroscience
  • Electrical Engineering

Background:

  • Artificial synapse arrays using electrolyte-gated transistors (EGTs) show promise for neuromorphic computing.
  • Integrating EGTs is challenging due to conflicts between polymer electrolytes and photolithography.

Purpose of the Study:

  • To develop a scheme for high-density integration of EGTs using a lateral-gate structure.
  • To enhance artificial synapse array performance through a novel electrolyte framework.

Main Methods:

  • Implemented a lateral-gate structure for EGT integration.
  • Fabricated a 100 × 100 EGT array on a 2.5 × 2.5 cm² glass substrate.
  • Developed a porous zeolitic imidazolate frameworks-67 based electrolyte framework.

Main Results:

  • Achieved a unit density of up to 1600 devices cm⁻².
  • The electrolyte framework exhibited ionic conductivity up to 2.87 × 10⁻³ S cm⁻¹.
  • The artificial synapse array demonstrated high performance and homogeneity in image processing tasks.

Conclusions:

  • The lateral-gate structure facilitates high-density EGT integration, overcoming previous limitations.
  • The developed electrolyte framework significantly enhances array performance.
  • The integrated array shows feasibility for practical applications like handwriting recognition with 92.80% accuracy.