Ultrasensitive dim-light neuromorphic vision sensing via momentum-conserved reconfigurable van der Waals heterostructure

Lei Xu, Junling Liu, Xinrui Guo, Shuo Liu, Xilin Lai, Jingyue Wang, Mengshi Yu, Zhengdao Xie, Hailin Peng, Xuming Zou, Xinran Wang, Ru Huang and Ming He ()
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Lei Xu: Peking University
Junling Liu: Peking University
Xinrui Guo: Peking University
Shuo Liu: Peking University
Xilin Lai: Peking University
Jingyue Wang: Peking University
Mengshi Yu: Peking University
Zhengdao Xie: Hunan University
Hailin Peng: Peking University
Xuming Zou: Hunan University
Xinran Wang: Nanjing University
Ru Huang: Peking University
Ming He: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Reconfigurable phototransistors featuring bipolar photoresponses are favorable for manipulating high-performance neuromorphic vision sensory. Here, we present a momentum-conserved reconfigurable phototransistor based on the van der Waals heterojunction between methylammonium lead iodide perovskite and two-dimensional Bi2O2Se semiconductor, which exhibits a synergistic interplay of interband hot-carrier transitions and reconfigurable heterointerface band alignments, eventually achieving the ultrahigh bipolar optoelectronic performances with the photoresponsivity of 6×107 AW−1, accompanied by the specific detectivity of 5.2×1011 Jones, and the dynamic range of 110 dB. Moreover, A 3×3 heterotransistor array is fabricated to perform in-sensor analog multiply-accumulate operations even under the challenging dim illumination of 0.1 μWcm−2 that comparable to natural moonlight. The reconfigurable heterotransistor array can be further adopted to enhance the traffic-light detection under dim-light conditions. Our advancement in momentum-conserved reconfigurable heterotransistor signifies a leap forward in real-time, energy-efficient, and low-light image processing for neuromorphic vision sensors.

Date: 2024
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DOI: 10.1038/s41467-024-53268-4

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