Nickel‐Enforced MoS ₂ /MoTe ₂ Heterostructure for Energy Harvesting from Stray Magnetic Field

ABSTRACT Harnessing magnetic noise fields for sustainable energy harvesting offers a pervasive power source for wireless devices. In this context, recently developed 2D van der Waals heterostructures have emerged as promising candidates for advancing the fundamental understanding of magnetoelectric (ME) coupling and the development of nanoscale ME devices. This work investigates thermo‐magneto‐electric coupling to enable MoS ₂ /MoTe ₂ ‐based heterostructures for harvesting energy from stray magnetic fields. Furthermore, introducing a nickel layer further enhances interfacial interactions under a magnetic field, and density functional theory (DFT) calculations confirm its significant influence on the ME behavior of the heterostructures. The optimized flexible heterostructure demonstrated an open‐circuit voltage of ∼4.5 V and a power density of ∼2.12 mW/cm ³ under an alternating current (AC) magnetic noise field of 1.33 mT. These results highlight the potential of the novel 2D‐based heterostructure for harvesting stray magnetic fields and powering low‐power electronic devices in self‐powered wireless sensor network applications.