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A Flexible Mott Synaptic Transistor for Nociceptor Simulation and Neuromorphic Computing
Author(s) -
Deng Xing,
Wang SiQi,
Liu YuXiang,
Zhong Ni,
He YuHui,
Peng Hui,
Xiang PingHua,
Duan ChunGang
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202101099
Subject(s) - neuromorphic engineering , materials science , transistor , synapse , memristor , synaptic plasticity , flexible electronics , computer science , long term potentiation , nanotechnology , optoelectronics , neuroscience , artificial neural network , electronic engineering , voltage , electrical engineering , artificial intelligence , biochemistry , chemistry , receptor , biology , engineering
Designing transparent flexible electronics with multi‐biological neuronal functions and superior flexibility is a key step to establish wearable artificial intelligence equipment. Here, a flexible ionic gel‐gated VO 2 Mott transistor is developed to simulate the functions of the biological synapse. Short‐term and long‐term plasticity of the synapse are realized by the volatile electrostatic carrier accumulation and nonvolatile proton‐doping modulation, respectively. With the achievement of multi‐essential synaptic functions, an important sensory neuron, nociceptor, is perfectly simulated in our synaptic transistors with all key characteristics of threshold, relaxation, and sensitization. More importantly, this synaptic transistor exhibits high tolerance to the bending deformation, and the cycle‐to‐cycle variations of multi‐conductance states in potentiation and depression properties are maintained within 4%. This superior stability further indicates that our flexible device is suitable for neuromorphic computing. Simulation results demonstrate that high recognition accuracy of handwritten digits (>95%) can be achieved in a convolution neural network built from these synaptic transistors. The transparent and flexible Mott transistor based on electrically‐controlled VO 2 metal‐insulator transition is believed to open up alternative approaches to developing highly stable synapses for future flexible neuromorphic systems.