940 Nm Near‐Infrared Photosynapses Based on Sn─Pb Perovskite for Efficient Face Recognition
Abstract
ABSTRACT Tin–lead perovskites offer great potentials for neuromorphic optoelectronics owing to their narrow bandgap and robust near‐infrared (NIR) absorption. However, high‐performance three‐terminal artificial synapses based on these materials remain scarce due to challenges in forming high‐quality semiconductor films. Here, we demonstrate a perovskite synaptic field‐effect transistor (FET) capable of efficient 940 nm sensing and neuromorphic modulation, enabled by uniform, high‐crystallinity FASn 0.8 Pb 0.2 I 3 thin films. A molecular additive, 1‐bromo‐4‐(methylsulfinyl)benzene (BMSB), precisely regulates crystallization, enlarges grains, and suppresses trap formation, thereby reducing ion migration and enhancing charge transport. The optimized devices achieve high hole mobility and an exceptional responsivity of 231 A W −1 at 940 nm, marking the first demonstration of efficient 940 nm infrared photoresponse in three‐terminal perovskite artificial synapses. Benefiting from balanced ion‐electron coupling, the devices exhibit reliable synaptic behaviors, including excitatory postsynaptic currents, paired‐pulse facilitation, and learning–forgetting cycles. Integrated into a reservoir–computing framework, the synaptic FETs enable accurate NIR facial recognition, underscoring their potential for in‐sensor computing. This work establishes a molecular‐level strategy to harmonize ionic and electronic processes in Sn─Pb perovskites, advancing light‐programmable neuromorphic transistors for next‐generation intelligent NIR vision systems.
Article Details
Authors (14)
Wanqi Duan
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education and State Key Laboratory of Green Papermaking and Resource Recycling Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Yanyan Gong
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education and State Key Laboratory of Green Papermaking and Resource Recycling Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Hao Wang
Division of Quantitative Sciences, Department of Oncology Johns Hopkins University School of Medicine Baltimore Maryland USA
Xinxin Xia
Xiao Long
Maojie Zhang
Qinlin Wei
School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated Materials Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies Shandong University Jinan China
Dan Huang
School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices
Shoujuan Wang
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education and State Key Laboratory of Green Papermaking and Resource Recycling Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Fangong Kong
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education and State Key Laboratory of Green Papermaking and Resource Recycling Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Jinghai Li
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education and State Key Laboratory of Green Papermaking and Resource Recycling Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Yuebin Xi
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education and State Key Laboratory of Green Papermaking and Resource Recycling Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Benzheng Lyu
School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated Materials Shandong Key Laboratory of Advanced Organosilicon Materials and Technologies Shandong University Jinan China
William W. Yu
School of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion