Organic-Inorganic Hybrid Synaptic Transistors: Methyl-Silsesquioxanes-Based Electric Double Layer for Enhanced...

Area of Science:

• Materials Science
• Neuroscience
• Electrical Engineering

Background:

• Organic electrical double-layer (EDL) synaptic transistors lack thermal and chemical stability, limiting their integration with CMOS processes.
• Existing organic materials are incompatible with high-temperature CMOS fabrication due to poor stability.

Purpose of the Study:

• To develop stable organic-inorganic hybrid synaptic transistors compatible with CMOS processes.
• To investigate the synaptic behaviors and information storage capabilities of these novel transistors.

Main Methods:

• Fabrication of Al/MSQ electrolyte/Pt capacitors and MSQ-based EDL synaptic transistors.
• Characterization of device capacitance and synaptic functionalities (excitatory post-synaptic current, paired-pulse facilitation, etc.).
• Training a deep neural network (DNN) using a handwritten dataset to evaluate device performance.

Main Results:

• MSQ electrolytes demonstrated excellent thermal and chemical stability, ensuring CMOS process compatibility.
• MSQ-based EDL synaptic transistors exhibited diverse synaptic behaviors and stable operation over five cycles.
• A DNN trained with these transistors achieved a 92.28% recognition rate on the MNIST dataset.

Conclusions:

• MSQ-based hybrid synaptic transistors offer a promising solution for next-generation artificial synapse components.
• The demonstrated stability and functionality pave the way for advanced neuromorphic computing applications.
• These devices bridge the gap between organic electronics and established semiconductor manufacturing.