Low-Power and Flexible Optoelectronic Synapses Based on P3HT:Y6 Bulk Heterojunctions with Broadband Perception...

Area of Science:

• Materials Science
• Neuroscience
• Optoelectronics

Background:

• Flexible artificial synapses are crucial for developing advanced soft or wearable neuromorphic visual systems.
• These systems require devices with broadband perception and minimal energy dissipation.

Purpose of the Study:

• To design and construct a broadband optoelectronic synapse.
• To evaluate its performance on both rigid and flexible substrates for neuromorphic applications.

Main Methods:

• Fabrication of a P3HT:Y6 bulk heterojunction based optoelectronic synapse.
• Characterization of its optoelectronic properties across a wide spectral range (265-1300 nm).
• Assessment of synaptic characteristics, energy consumption, and mechanical durability.

Main Results:

• The device demonstrated robust perception from deep-ultraviolet to near-infrared.
• Optimal P3HT:Y6 ratios yielded enhanced short- and long-term memory.
• Near-infrared perception was achieved via intermolecular charge transfer.
• Ultra-low energy consumption (0.113 fJ) and high mechanical robustness were observed.
• 100% accuracy in dynamic trajectory recognition via optoelectronic reservoir computing.

Conclusions:

• The developed optoelectronic synapse offers broadband perception and ultra-low energy consumption.
• Its flexibility and durability make it suitable for wearable neuromorphic systems.
• Potential applications include advanced visual sensing and processing in low-power devices.