Investigating photocurrent enhancement of monolayer MoSe2/MoS2 heterojunction integrated with Ag nanowire

IF 2.3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physics Letters A Pub Date : 2025-01-30 DOI:10.1016/j.physleta.2025.130315

Qingsong Liang , Cunwei Kong , Jiangkai Yuan , Quan Wang

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引用次数: 0

Abstract

The heterojunction composed of monolayer two-dimensional transition metal chalcogenides has excellent physicochemical properties. However, atomical thickness and low absorption limited its wide application. Surface plasmons (SPs) of metal nanostructures can realize the localization of light and the enhancement of electromagnetic field, which is an effective way to improve the light absorption for the heterojunction film. Herein, the SPs of single silver nanowire (Ag NW) under 405 nm excitation light were used to enhance the photocurrent of monolayer (1L) MoSe₂/MoS₂ heterojunction by 10-fold. The light response speed of the heterojunction phototransistor based on Ag NW was improved by 1000-fold. In addition, theoretical simulation shows that the 'hot spot' phenomenon occurred at the interface between Ag NW and 1 L MoSe₂/MoS₂ heterojunction, which increased the maximum electric field strength by 58.8 %. This research provides a reference for the application of metal-heterojunction hybrid structures in photodetection.

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来源期刊

Physics Letters A 物理-物理：综合

CiteScore

5.10

自引率

3.80%

发文量

493

审稿时长

30 days

期刊介绍： Physics Letters A offers an exciting publication outlet for novel and frontier physics. It encourages the submission of new research on: condensed matter physics, theoretical physics, nonlinear science, statistical physics, mathematical and computational physics, general and cross-disciplinary physics (including foundations), atomic, molecular and cluster physics, plasma and fluid physics, optical physics, biological physics and nanoscience. No articles on High Energy and Nuclear Physics are published in Physics Letters A. The journal''s high standard and wide dissemination ensures a broad readership amongst the physics community. Rapid publication times and flexible length restrictions give Physics Letters A the edge over other journals in the field.