Ultrasensitive Dim-light Neuromorphic Vision Sensing Via Momentum-conserved Reconfigurable Van Der Waals Heterostructure

Overview

Journal Nat Commun

Specialty Biology

Date 2024 Oct 18

PMID 39424814

Authors

Lei Xu

Junling Liu

Xinrui Guo

Shuo Liu

Xilin Lai

Jingyue Wang

Mengshi Yu

Zhengdao Xie

Hailin Peng

Xuming Zou

Xinran Wang

Ru Huang

Ming He

Affiliations

Soon will be listed here.

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 BiOSe 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 6×10 AW, accompanied by the specific detectivity of 5.2×10 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 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.

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