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IGZO-based neuromorphic transistors with temperature-dependent synaptic plasticity and spiking logics

Science China(Information Sciences) 2022年第6期65卷 218-225页

作者： Ying ZHU Yongli HE Chunsheng CHEN Li ZHU Changjin WAN Qing WAN School of Electronic & Science Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing University

Temperature is one of the vital influential factors for all physiological and mental activities.Studying the influence of temperature on the properties of synaptic devices is of great importance for neuromorphic computing and bionic perception. Here, indium-gallium-zinc-oxide(IGZO) based electrical-doublelayer neuromorphic transistors were proposed for the emulation of temperature-dependent synaptic functions.The influence of temperature on the synaptic plasticity, including excitatory postsynaptic current, pairedpulse facilitation, and dynamic filtering was investigated. Interestingly, temperature induced spiking AND to OR logic switching was demonstrated in an IGZO-based neuromorphic transistor with two in-plane gate electrodes. Our results provided an insight into the temperature-induced synaptic functions and spiking logic switching, which is interesting for neuromorphic systems with biological fidelity.

关键词： neuromorphic transistors IGZO TFTs temperature-dependent synaptic plasticity logic transformation

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W-doped In_(2)O_(3) nanofiber optoelectronic neuromorphic transistors with synergistic synaptic plasticity

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Chinese Physics B 2023年第11期32卷 604-608页

作者：杨洋傅传玉柯硕崔航源方晓万昌锦万青 School of Electronic Science&Engineering and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China School of Micro-Nano Electronics Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 310027China

neuromorphic devices that mimic the information processing function of biological synapses and neurons have attracted considerable attention due to their potential applications in brain-like perception and computing. In this paper,neuromorphic transistors with W-doped In_(2)O_(3)nanofibers as the channel layers are fabricated and optoelectronic synergistic synaptic plasticity is also investigated. Such nanofiber transistors can be used to emulate some biological synaptic functions, including excitatory postsynaptic current(EPSC), long-term potentiation(LTP), and depression(LTD). Moreover, the synaptic plasticity of the nanofiber transistor can be synergistically modulated by light pulse and electrical pulse.At last, pulsed light learning and pulsed electrical forgetting behaviors were emulated in 5×5 nanofiber device array.Our results provide new insights into the development of nanofiber optoelectronic neuromorphic devices with synergistic synaptic plasticity.

关键词： W-doped In_(2)O_(3)nanofibers neuromorphic transistors optoelectronic synaptic plasticity

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Synaptic plasticity and classical conditioning mimicked in single indium-tungsten-oxide based neuromorphic transistor

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Chinese Physics B 2021年第5期30卷 52-56页

作者：刘锐何勇礼姜珊珊朱力陈春生祝影万青 School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China

Emulation of synaptic function by ionic/electronic hybrid device is crucial for brain-like computing and neuromorphic systems.Electric-double-layer(EDL)transistors with proton conducting electrolytes as the gate dielectrics provide a prospective approach for such application.Here,artificial synapses based on indium-tungsten-oxide(IWO)-based EDL transistors are proposed,and some important synaptic functions(excitatory post-synaptic current,paired-pulse facilitation,filtering)are emulated.Two types of spike-timing-dependent plasticity(Hebbian STDP and anti-Hebbian STDP)learning rules and multistore memory(sensory memory,short-term memory,and long-term memory)are also mimicked.At last,classical conditioning is successfully demonstrated.Our results indicate that IWO-based neuromorphic transistors are interesting for neuromorphic applications.

关键词： neuromorphic transistors synaptic plasticity oxide-based semiconductors classical conditioning

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