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Highly Stable, Low-Energy-Consumption Block Copolymer Optoelectronic Synaptic Devices Prepared by Vertical Phase

Longlong Jiang1, Yucong Bao2, Zixiang Lu2

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|January 23, 2026
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Summary
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Researchers developed air-stable organic synaptic devices using a blend of P3HT-b-PPI(5F) and PMMA. These devices mimic brain functions, showing high stability and low energy consumption for bionic electronics applications.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Bionic Systems

Background:

  • Environmental stability is crucial for organic synaptic devices in smart electronics.
  • Organic semiconductors' sensitivity to moisture and oxygen hinders air-stable device fabrication.

Purpose of the Study:

  • To develop air-stable organic synaptic devices using a novel material blend.
  • To demonstrate the potential of these devices in bionic electronics.

Main Methods:

  • Blending poly(3-hexylthiophene)-block-poly(phenyl isocyanide) with pentafluorophenyl ester (P3HT-b-PPI(5F)) and poly(methyl methacrylate) (PMMA).
  • Utilizing vertical phase separation for one-step preparation of active and encapsulated layers.
  • Simulating synaptic behavior, filtering, and decoding under green light stimulation.

Main Results:

  • The P3HT-b-PPI(5F)/PMMA synaptic device exhibited high air stability, retaining over 90% of its postsynaptic current after 2 weeks.
  • Successfully simulated basic synaptic behavior, high-pass filtering, and optical decoding of "Morse code".
  • Achieved low energy consumption (0.6 fJ per event) and demonstrated biomimetic learning and forgetting behaviors.

Conclusions:

  • A novel method for preparing air-stable organic synaptic devices was demonstrated.
  • The developed devices show promise for future bionic electronic applications.
  • The P3HT-b-PPI(5F)/PMMA blend offers a viable route to stable and functional organic synaptic devices.