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Neuromorphic computing offers a promising solution to the Von Neumann bottleneck, enabling energy-efficient and intelligent sensing platforms. Although 2D materials are ideal for biomimetic neuromorphic devices, achieving multifunctional synaptic operations through simple configurations and linear weight updates remains challenging. Inspired by biological axons, in-plane anisotropy of two-dimensional Nb2GeTe4 is utilized to develop dual-electron optoelectronic synaptic devices.The device exhibits anisotropic hole mobility (137.97 cm²V⁻¹s⁻¹ along the a-axis and 78.29 cm²V⁻¹s⁻¹ along the b-axis) and wavelength-dependent photoresponse. This enables directional synaptic plasticity under electro-optic co-stimulation and achieves 98.3% accuracy along the a-axis and 88.3% accuracy along the b-axis in adaptive image processing.It also demonstrated a machine vision system with an object recognition accuracy of 89.6% and an intelligent vehicle navigation platform with a decision accuracy of 90.2%. The integration of anisotropic transmission and spectrally tunable response in a single material paves the way for compact neuromorphic hardware with multimodal sensing and parallel processing capabilities.This research advances two-dimensional material-based neuroelectronics for edge computing, autonomous robots, and adaptive artificial intelligence systems.

Original link

Anisotropic Optoelectronic Synapses in 2D Nb2GeTe4 for Direction-Programmable Neuromorphic Perception and Decision-Making

Advanced Materials ( IF 26.8 )

Pub Date : 2025-09-04

DOI: 10.1002/adma.202509686