Magnetic field modulation of photocurrent in NiFe/n-Si magneto-photovoltaic heterojunctions for multifunctional optoelectronic applications

IF 2.8 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Current Applied Physics Pub Date : 2026-01-01 Epub Date: 2025-10-27 DOI:10.1016/j.cap.2025.10.013

Zhibo Zhou, Nan Sun, Qian Cao, Jican Hao, Hao Geng, Ning Fang, Ziyao Zhou

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引用次数: 0

Abstract

Magnetically tunable optoelectronic devices that integrate sensing and energy-harvesting functionalities hold significant potential for next-generation electronics and wearable technologies. Here, we demonstrate a multifunctional, self-powered optoelectronic device based on a Ni₈₀Fe₂₀ (permalloy) ferromagnetic thin film interfaced with n-type silicon (n-Si), forming a magneto-photovoltaic heterojunction. This structure enables self-powered operation under illumination, leveraging the built-in electric field at the heterojunction interface to efficiently separate photogenerated carriers without external bias. The device generates a photocurrent upon light exposure, which can be modulated by external magnetic fields. A photocurrent modulation of up to 33 % is achieved, with the modulation magnitude strongly dependent on the NiFe film thickness and the applied magnetic field strength. This tunability arises from the combined effects of Lorentz-force-induced carrier deflection, spin-dependent scattering, and interfacial magnetostrictive strain, which collectively influence the transport dynamics of photogenerated carriers. These findings demonstrate that Cu/Ni₈₀Fe₂₀/n-Si heterojunctions offer a versatile platform for multifunctional optoelectronic applications, such as the photodetector.

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多功能光电应用中NiFe/n-Si磁光伏异质结光电流的磁场调制

集成传感和能量收集功能的磁可调谐光电器件在下一代电子和可穿戴技术中具有巨大的潜力。在这里，我们展示了一种基于Ni80Fe20 （permalloy）铁磁薄膜与n型硅（n-Si）界面的多功能自供电光电器件，形成磁光电异质结。这种结构能够在照明下自供电，利用异质结界面上的内置电场，有效地分离光生载流子，而没有外部偏置。该装置在光照射时产生光电流，该光电流可由外部磁场调制。实现了高达33%的光电流调制，调制幅度强烈依赖于NiFe薄膜厚度和外加磁场强度。这种可调性源于洛伦兹力诱导的载流子偏转、自旋相关散射和界面磁致伸缩应变的综合效应，它们共同影响光生载流子的输运动力学。这些发现表明，Cu/Ni80Fe20/n-Si异质结为光电探测器等多功能光电应用提供了一个通用平台。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.