nl0c00298_si_001.pdf (1.04 MB)
Optically Stimulated Synaptic Devices Based on the Hybrid Structure of Silicon Nanomembrane and Perovskite
journal contribution
posted on 2020-04-01, 21:04 authored by Lei Yin, Wen Huang, Rulei Xiao, Wenbing Peng, Yiyue Zhu, Yiqiang Zhang, Xiaodong Pi, Deren YangOptoelectronic synaptic
devices have been attracting increasing
attention due to their critical role in the development of neuromorphic
computing based on optoelectronic integration. Here we start with
silicon nanomembrane (Si NM) to fabricate optoelectronic synaptic
devices. Organolead halide perovskite (MAPbI3) is exploited
to form a hybrid structure with Si NM. We demonstrate that synaptic
transistors based on the hybrid structure are very sensitive to optical
stimulation with low energy consumption. Synaptic functionalities
such as excitatory post-synaptic current (EPSC), paired-pulse facilitation,
and transition from short-term memory to long-term memory (LTM) are
all successfully mimicked by using these optically stimulated synaptic
transistors. The backgate-enabled tunability of the EPSC of these
devices further leads to the LTM-based mimicking of visual learning
and memory processes under different mood states. This work contributes
to the development of Si-based optoelectronic synaptic devices for
neuromorphic computing.