N:ZnO/MoS_(2)-heterostructured flexible synaptic devices enabling optoelectronic co-modulation for robust artificial visual systems  

作　　者：Lei Xu Wenxiao Wang Yang Li Yonghui Lin Wenjing Yue Kai Qian Qinglei Guo Jeonghyun Kim Guozhen Shen 

机构地区：[1]School of Information Science and Engineering,University of Jinan,Jinan 250022,China [2]School of Microelectronics,Shandong University,Jinan 250101,China [3]Department of Electronic Convergence Engineering,Kwangwoon University,Seoul 01897,Republic of Korea [4]School of Integrated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Nano Research》2024年第3期1902-1912,共11页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.62174068).

摘　　要：With the merits of non-contact,highly efficient,and parallel computing,optoelectronic synaptic devices combining sensing and memory in a single unit are promising for constructing neuromorphic computing and artificial visual chip.Based on this,a N:ZnO/MoS_(2)-heterostructured flexible optoelectronic synaptic device is developed in this work,and its capability in mimicking the synaptic behaviors is systemically investigated under the electrical and light signals.Versatile synaptic functions,including synaptic plasticity,long-term/short-term memory,and learning-forgetting-relearning property,have been achieved in this synaptic device.Further,an artificial visual memory system integrating sense and memory is emulated with the device array,and the visual memory behavior can be regulated by varying the light parameters.Moreover,the optoelectronic co-modulation behavior is verified by applying mixed electric and light signals to the array.In detail,a transient recovery property is discovered when the electric signals are applied in synergy during the decay of the light response,of which property facilitates the development of robust artificial visual systems.Furthermore,by superimposing electrical signals during the light response process,a differentiated response of the array is achieved,which can be used as a proof of concept for the color perception of the artificial visual system.

关 键 词：flexible synaptic device synaptic plasticity optoelectronic synapse robust visual memory optoelectronic co-modulation artificial visual system 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]