Epitaxial growth of full-vdW α-In_(2)Se_(3)/MoS_(2) heterostructures for all-in-one sensing and memory-computing artificial visual system  

作　　者：Zheng Zhang Lei Shi Bin Wang Jingyuan Qu Xiaoling Wang Tao Wang Qitao Jiang Wuhong Xue Xiaohong Xu 

机构地区：[1]Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education&School of Chemistry and Materials Science of Shanxi Normal University,Taiyuan 030031,China [2]Collaborative Innovation Center for Advanced Permanent Magnetic Materials and Technology of Ministry of Education&Research Institute of Materials Science of Shanxi Normal University,Taiyuan 030031,China

出　　处：《Chinese Chemical Letters》2025年第3期570-575,共6页中国化学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.52371245,12174237,12241403);the National Key Research and Development Program of China(No.2022YFB3505301).

摘　　要：Van der Waals(vdW)ferroelectric-semiconductor heterojunction provides reconfigurable band alignment based on optical/electrical-assisted polarization switching,which shows great potential to construct artificial visual neural systems.However,the mechanical exfoliation fabrication scheme for proof-of-concept demonstrations and fundamental studies is cumbersome and not scalable for practical application.Here,we present a synthetic strategy for the large-scale and high crystallinity growth of planar/verticalα-In_(2)Se_(3)/MoS_(2)heterojunctions by dynamically tuning the growth temperature.Furthermore,based on theα-In_(2)Se_(3)/MoS_(2)heterostructures,photo-synapse devices are designed and fabricated to simulate visual neural systems functions,including multistate storage,optical logic operation,potentiation and depression,paired-pulse facilitation(PPF),short-term memory(STM),long-term memory(LTM),and Learning-Forgetting-Relearning.By coupling the spatiotemporally relevant optical and electric information,the device can mimic the superior biological visual system’s light adaptation and Pavlovian conditioning.This work provides a strategy for dynamically tuning the orientation of ferroelectric-semiconductor heterojunction stacks and will give impetus to applying all-in-one sensing and memory-computing artificial vision systems.

关 键 词：Heterojunction Ferroelectric α-In_(2)Se_(3)/MoS_(2) Band alignment OPTOELECTRONIC Artificial vision system 

分 类 号：TN304[电子电信—物理电子学] O469[理学—凝聚态物理]