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Area of Science:

  • Materials Science
  • Nanotechnology
  • Neuroscience

Background:

  • Neuromorphic computing requires efficient synaptic devices integrating perception and computation.
  • Optoelectronic synaptic devices are key for advanced sensory processing.
  • 2D covalent organic frameworks (COFs) are underexplored for optoelectronic synaptic applications.

Purpose of the Study:

  • To develop and investigate a novel optoelectronic synaptic device utilizing 2D COFs.
  • To explore the optoelectronic and memristive properties of the COF-based device.
  • To demonstrate the device's capability in visual computational tasks.

Main Methods:

  • Fabrication of an Al/COF-DaTp/ITO device using an anthracene-based 2D COF (COF-DaTp) film via a room-temperature interface-confined strategy.
  • Characterization of the device's optoelectronic resistive switching and history-dependent memristive behavior.
  • Evaluation of the device's performance in optical sensing, image denoising, and recognition.

Main Results:

  • The device exhibited dual optoelectronic modulation with 32 distinct photoconductive states.
  • Significant history-dependent memristive behavior was observed, showing 32 conductive states.
  • The device successfully performed optical sensing and basic image denoising/recognition, improving accuracy and reducing training epochs.

Conclusions:

  • The 2D COF-DaTp based optoelectronic synaptic device demonstrates promising dual optoelectronic modulation and memristive properties.
  • The device enables simultaneous optical sensing and visual computation, including image denoising and recognition.
  • This research paves the way for 2D COF applications in advanced visual computational processing and neuromorphic systems.