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Bio-Inspired Full-Spectrum Bidirectional Optoelectronic Synaptic Transistor for In-Sensor Neuromorphic Vision
Meiqiu Dong1, Yu Zhang1, Mingsheng Luo1
1Ji Hua Laboratory, Foshan, Guangdong, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|June 13, 2026
Summary
Researchers developed advanced organic optoelectronic synaptic transistors (OSTs) inspired by bird vision. These devices enable full-spectrum, bidirectional processing for enhanced neuromorphic vision systems and intelligent machine vision.
Area of Science:
- Materials Science
- Neuroscience
- Optoelectronics
Background:
- Optoelectronic synaptic transistors (OSTs) are crucial for neuromorphic vision processing, mimicking biological systems.
- Current OSTs face limitations in complex visual processing due to wavelength-selective or polarity-dependent modulation.
Purpose of the Study:
- To develop high-performance, full-spectrum, bidirectional OSTs using organic 2D molecular crystal (2DMC) heterojunctions.
- To overcome the control paradigm limitations of existing artificial synaptic technologies.
Main Methods:
- Fabrication of a high-quality 2DMC heterostructure for efficient exciton separation and diffusion.
- Implementation of a bipolar heterostructure transistor design for dual modulation (spectral tuning and gate polarity).
Main Results:
- Achieved remarkable ambipolar characteristics with high responsivity (6.3 × 10^4 A W^-1) under weak light.
- Successfully emulated bidirectional neuroplasticity by dynamically reconfiguring between excitatory and inhibitory synaptic behaviors.
- Demonstrated >90% classification accuracy in an intelligent-vehicle-mounted vision system across complex scenarios.
Conclusions:
- The developed 2DMC heterojunction provides an effective strategy for high-performance bidirectional optoelectronic synapses.
- This technology advances neuromorphic computing and intelligent machine vision capabilities.
- Paves the way for next-generation artificial visual systems inspired by biological principles.
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