Applied Physics Letters

Optoelectronic synapse based on the Bi2O2Se/Cs3Cu2I5 heterojunction for neuromorphic computing

J Jinwen Lin (Guangdong Engineering Research Center of School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 2 , Foshan 528225,) B Bin Li Z Zheng Yin S Sicheng Wan Y Yao Meng (Center for Systems and Control) H Hong Zhou (Shanghai Collaborative Innovation Center of Agri-Seeds, School of Agriculture and Biology, Shanghai Jiao Tong University) F Fangliang Gao (School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 1 , Guangzhou 510006,) S Shuti Li (Guangdong Engineering Research Center of Optoelectronic Functional Materials and Device, School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 1 , Foshan 528225,) Y Yong Zhang Q Qingbing Zha (The First Affiliated Hospital of Jinan University 3 , Guangzhou 510632,) J Jinhua Li S Said Nasir Khisro (Physics Department, University of Kotli Azad Kashmir Pakistan 4 , Azad Kashmir 11100,) X Xinman Chen (Guangdong Engineering Research Center of School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 2 , Foshan 528225,)

Abstract

In this work, we report an optoelectronic synapse based on the Bi2O2Se/Cs3Cu2I5 heterojunction formed by consequently depositing Bi2O2Se and Cs3Cu2I5 thin films by chemical vapor deposition methods. The fabricated Au/Bi2O2Se/Cs3Cu2I5/Au devices exhibit the light-tunable photoresponse under visible light illumination. Synaptic functions including paired-pulse facilitation, the transition from short-term plasticity to long-term plasticity, associative learning and optical encoding, are conveniently reproduced on one single synaptic device by utilizing the light-tunable evolution of photocurrent. Furthermore, the front-end image preprocessing to enhance the accuracy and efficiency of image recognition was demonstrated based on the constructed device array (5 × 7). This indicates the potential application of Bi2O2Se/Cs3Cu2I5 optoelectronic synapses for the forthcoming neuromorphic computing.

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Article Details

Volume / Issue Vol. 126, Issue 1
Published January 06, 2025
ISSN 0003-6951
Publisher American Institute of Physics

Journal Info

Applied Physics Letters

American Institute of Physics
ISSN: 0003-6951 Physical Sciences

Authors (13)

J

Jinwen Lin

Guangdong Engineering Research Center of School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 2 , Foshan 528225,

B

Bin Li

Z

Zheng Yin

S

Sicheng Wan

Y

Yao Meng

Center for Systems and Control

H

Hong Zhou

Shanghai Collaborative Innovation Center of Agri-Seeds, School of Agriculture and Biology, Shanghai Jiao Tong University

F

Fangliang Gao

School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 1 , Guangzhou 510006,

S

Shuti Li

Guangdong Engineering Research Center of Optoelectronic Functional Materials and Device, School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 1 , Foshan 528225,

Y

Yong Zhang

Q

Qingbing Zha

The First Affiliated Hospital of Jinan University 3 , Guangzhou 510632,

J

Jinhua Li

S

Said Nasir Khisro

Physics Department, University of Kotli Azad Kashmir Pakistan 4 , Azad Kashmir 11100,

X

Xinman Chen

Guangdong Engineering Research Center of School of Electronic Science and Engineering (School of Microelectronics), South China Normal University 2 , Foshan 528225,

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