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Ultra-thin vertical tft photosensor and photosynapse based on au-doped-graphene under transition metal selenide reaction

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Journal of Materials Science & Technology 2024年第16期183卷 215-222页

作者： Ting Kang Adila Rani Wanqi Ren M Junaid Sultan Nae-Eung Lee Tae Geun Kim School of Electrical Engineering Korea UniversitySeoul 02841South Korea School of Advanced Materials Science&Engineering Sungkyunkwan UniversityGyeonggi-do 16419South Korea

The development of artificial photosensitive synapses with high sensitivity and biomimetic properties that combine innovative concepts and neuromorphic architectures is crucial to achieving highly integrated and flexible intelligent visual ***,graphene heterostructure-based photosensitive synaptic transistors have been extensively studied for this ***,compared to traditional transistors,vertical structure thin film transistors(VTFTs)with ultra-short channels and advantages,such as high integration,have yet to be investigated in photosensitive ***,we report an ultra-thin VTFT featuring a graphene/W_(x)Se_(x-1)van der Waals heterostructure that combines photonic and neuromorphic *** demonstrate a VTFT in which the channel layer is formed by covalently bonded W_(x)Se_(x-1)nanomaterials produced by introducing Se atoms on the surface of a tungsten metal thin film deposited via radio-frequency *** structure successfully simulated the main synaptic function,exhib-ited photosensitive synaptic responses to ultraviolet(λ=365 nm)light,and demonstrated highly reliable electrical ***,the incorporation of gold nanoparticles changed the photosensitive synaptic response properties of the graphene/W_(x)Se_(x-1)heterostructure from excitatory to inhibitory,show-ing a responsivity of about∼14 A W-1,which was attributed to the heterojunction interface resonant effects and efficient charge transfer induced by localized surface *** further enabled optical artificial synaptic applications while operating with low voltage spikes and low light *** work provides a novel strategy for integrating and developing biological and nano-electronic systems.

关键词： Ultra-thin Vertical TFT Au nanoparticles photo sensor photo responsivity photo synapse

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