Polarization-sensitive photodetector based on MoS2/graphene van der Waals heterojunction

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-29 DOI:10.1016/j.apsusc.2025.163667

Lihan Wang, Binbin Ding, Denghui Yan, Xiaolong Ren, Yuan Zang, Song Feng, Zebin Li, Jun Wang, Qinglong Fang, Lianbi Li, Caijuan Xia

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引用次数: 0

Abstract

Van der Waals (vdWs) heterojunctions composed of two dimensions (2D) materials offer great opportunities for developing multifunctional and high-performance electronic and optoelectronic devices due to their unique optical and optoelectronic properties. However, most photodetectors lack sensitivity to light polarization. Notably, monolayer molybdenum disulfide (MoS₂) exhibits strong valley polarization and spin polarization characteristics, leading to selective absorption of circularly polarized light. The polarization dependence of the optical response rises from its unique anisotropic in-plane crystal structure. In this study, we report the growth of MoS₂ films on graphene by low-pressure chemical vapor deposition (LPCVD). Comprehensive characterization, including spectroscopic analysis, surface morphology, and surface analysis, confirms the uniformity and crystal quality of the MoS₂ film on graphene. The metal–semiconductor-metal (M−S−M) structure based on MoS₂/graphene exhibits sensitive circularly polarized selective absorption characteristics under circularly polarized light. This approach offers a promising route for the growth of transition metal dichalcogenides (TMDs), facilitating their application in high-performance electronics and polarized light detection.

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基于二硫化钼/石墨烯范德华异质结的偏振敏感光电探测器

由二维（2D）材料组成的范德华异质结（vdWs）由于其独特的光学和光电子特性，为开发多功能和高性能的电子和光电子器件提供了巨大的机会。然而，大多数光电探测器对光偏振缺乏灵敏度。值得注意的是，单层二硫化钼（MoS2）表现出强烈的谷极化和自旋极化特性，导致圆偏振光的选择性吸收。光学响应的偏振依赖性源于其独特的面内各向异性晶体结构。在这项研究中，我们报道了用低压化学气相沉积（LPCVD）在石墨烯上生长MoS2薄膜。综合表征，包括光谱分析、表面形貌和表面分析，证实了MoS2薄膜在石墨烯上的均匀性和晶体质量。基于MoS2/石墨烯的金属-半导体-金属（M−S−M）结构在圆偏振光下表现出敏感的圆偏振选择性吸收特性。这种方法为过渡金属二硫族化合物（TMDs）的生长提供了一条有前途的途径，促进了它们在高性能电子和偏振光检测中的应用。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.