Novel Semiconductive Ternary Hybrid Heterostructures for Artificial Optoelectronic Synapses

• Published in: Small (Weinheim an der Bergstrasse, Germany) Vol. 19; no. 44; pp. e2302197 - n/a
• Main Authors: Liu, Jing‐Yan, Zhang, Xiang‐Hong, Fang, Hua, Zhang, Shu‐Quan, Chen, Yong, Liao, Qing, Chen, Hong‐Ming, Chen, Hui‐Peng, Lin, Mei‐Jin
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 01.11.2023
• Subjects: artificial synapses; Biological effects; Devices; Electron transfer; Heterostructures; Modulation; Nanotechnology; Neuromorphic computing; Optoelectronic devices; optoelectronic performance; Polyoxometallates; Porous materials; resistive switching behaviors; Synapses; synaptic plasticity; System effectiveness; ternary hybrid heterostructures; ternary hybrid heterostructures; artificial synapses; resistive switching behaviors; optoelectronic performance; synaptic plasticity
• ISSN: 1613-6810; 1613-6829; 1613-6829
• DOI: 10.1002/smll.202302197

Synaptic devices that mimic biological synapses are considered as promising candidates for brain‐inspired devices, offering the functionalities in neuromorphic computing. However, modulation of emerging optoelectronic synaptic devices has rarely been reported. Herein, a semiconductive ternary hybrid heterostructure is prepared with a D‐D’‐A configuration by introducing polyoxometalate (POM) as an additional electroactive donor (D’) into a metalloviologen‐based D‐A framework. The obtained material features an unprecedented porous 8‐connected bcu‐net that accommodates nanoscale [α‐SiW12O40]4− counterions, displaying uncommon optoelectronic responses. Besides, the fabricated synaptic device based on this material can achieve dual‐modulation of synaptic plasticity due to the synergetic effect of electron reservoir POM and photoinduced electron transfer. And it can successfully simulate learning and memory processes similar to those in biological systems. The result provides a facile and effective strategy to customize multi‐modality artificial synapses in the field of crystal engineering, which opens a new direction for developing high‐performance neuromorphic devices. A facile and effective strategy to build semiconductive ternary D‐D’‐A hybrid heterostructures via introducing electroactive Keggin‐type POMs into photochromic metalloviologen‐based D‐A framework. This hybrid can readily achieve dual‐modulated synaptic plasticity when used in an artificial optoelectronic synapse, which create a great opportunity to provide expected functionalities for synaptic biomimicry and neuromorphic computation.