Improved performance in 0D/2D mixed dimensional homojunction MoS₂photodetectors by enhancing light absorption.

IF 2.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nanotechnology Pub Date : 2024-12-19 DOI:10.1088/1361-6528/ad9bb7

Lin Zhang, Peiyu Cheng, Yongqiang Du, Quan Wang

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引用次数: 0

Abstract

Molybdenum disulfide (MoS₂) possesses excellent potential for applications in the field of optoelectronic detection. However, the atomic-level thickness of the monolayer MoS₂leads to weak light absorption and a restricted absorption spectrum. The performance of monolayer MoS₂devices has reached a bottleneck. Fortunately, the above issues can be effectively solved by coupling with various types of photosensitivity nanostructures. In this work, we integrated MoS₂quantum dots (QDs) with high efficient light absorption with monolayer MoS₂to fabricate 0D/2D MoS₂QDs/MoS₂hybrid dimensional homojunction photodetectors. In this structure, MoS₂is used as an efficient carrier transport channel, while MoS₂QDs act as effective light absorbers to enhance the local electric field around MoS₂. The synergistic effect of MoS₂QDs and MoS₂is utilized to accelerate the migration rate of photogenerated carriers in the structure, and in particular, the highest responsivity of the MoS₂QDs/MoS₂hybrid device is 27.6 A W^-1with the detectivity as high as 2.13 × 10¹¹Jones under 532 nm laser, which is an order of magnitude higher than that of the pristine MoS₂devices. The synergistic effect of MoS₂QDs with monolayer MoS₂is verified by finite-difference time-domain simulation. The results will pave the way for the future development of high-performance MoS₂-based photodetectors.

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来源期刊

Nanotechnology 工程技术-材料科学：综合

CiteScore

7.10

自引率

5.70%

发文量

820

审稿时长

2.5 months

期刊介绍： The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.