Optoelectronic Synapses Based on MXene/Violet Phosphorus van der Waals Heterojunctions for Visual‑Olfactory Crossmodal Perception  

作　　者：Hailong Ma Huajing Fang Xinxing Xie Yanming Liu He Tian Yang Chai 

机构地区：[1]Center for Advancing Materials Performance From the Nanoscale(CAMP‑Nano),State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,People’s Republic of China [2]Institute of Microelectronics and Beijing National Research Center for Information Science and Technology(BNRist),Tsinghua University,Beijing 100084,People’s Republic of China [3]Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第6期38-52,共15页纳微快报（英文版）

基　　金：supported by National Natural Science Foundation of China(No.51902250).

摘　　要：The crossmodal interaction of different senses,which is an important basis for learning and memory in the human brain,is highly desired to be mimicked at the device level for developing neuromorphic crossmodal perception,but related researches are scarce.Here,we demonstrate an optoelectronic synapse for vision-olfactory crossmodal perception based on MXene/violet phosphorus(VP)van der Waals heterojunctions.Benefiting from the efficient separation and transport of photogenerated carriers facilitated by conductive MXene,the photoelectric responsivity of VP is dramatically enhanced by 7 orders of magnitude,reaching up to 7.7 A W^(−1).Excited by ultraviolet light,multiple synaptic functions,including excitatory postsynaptic currents,pairedpulse facilitation,short/long-term plasticity and“learning-experience”behavior,were demonstrated with a low power consumption.Furthermore,the proposed optoelectronic synapse exhibits distinct synaptic behaviors in different gas environments,enabling it to simulate the interaction of visual and olfactory information for crossmodal perception.This work demonstrates the great potential of VP in optoelectronics and provides a promising platform for applications such as virtual reality and neurorobotics.

关 键 词：Violet phosphorus MXene Van der Waals heterojunctions Optoelectronic synapses Crossmodal perception 

分 类 号：TN29[电子电信—物理电子学]