Silicon-Nanomembrane-Based Broadband Synaptic Phototransistors for Neuromorphic Vision

Yue Wang; Lei Yin; Shijie Huang; Rulei Xiao; Yiqiang Zhang; Dongke Li; Xiaodong Pi; Deren Yang

doi:10.1021/acs.nanolett.3c01853

Silicon-Nanomembrane-Based Broadband Synaptic Phototransistors for Neuromorphic Vision

Nano Lett. 2023 Sep 27;23(18):8460-8467. doi: 10.1021/acs.nanolett.3c01853. Epub 2023 Sep 18.

Authors

Yue Wang^{1

2}, Lei Yin¹, Shijie Huang¹, Rulei Xiao³, Yiqiang Zhang⁴, Dongke Li^{1

2}, Xiaodong Pi^{1

2}, Deren Yang^{1

2}

Affiliations

¹ State Key Laboratory of Silicon and Advanced Semiconductor Materials & School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China.
² Institute of Advanced Semiconductors & Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices, ZJU-Hangzhou Global Scientific and Technological Innovation Centre, Zhejiang University, Hangzhou, Zhejiang 311215, China.
³ National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China.
⁴ School of Materials Science and Engineering & College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.

PMID: 37721358
DOI: 10.1021/acs.nanolett.3c01853

Abstract

Neuromorphic vision has been attracting much attention due to its advantages over conventional machine vision (e.g., lower data redundancy and lower power consumption). Here we develop synaptic phototransistors based on the silicon nanomembrane (Si NM), which are coupled with lead sulfide quantum dots (PbS QDs) and poly(3-hexylthiophene) (P3HT) to form a heterostructure with distinct photogating. Synaptic phototransistors with optical stimulation have outstanding synaptic functionalities ranging from ultraviolet (UV) to near-infrared (NIR). The broadband synaptic functionalities enable an array of synaptic phototransistors to achieve the perception of brightness and color. In addition, an array of synaptic phototransistors is capable of simultaneous sensing, processing, and memory, which well mimics human vision.

Keywords: broadband; heterostructure; neuromorphic vision; optoelectronic synaptic device.