Improvement in photodetection characteristics of graphene/silicon heterojunction photodetector by ZnO interlayer

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

Physics Letters A Pub Date : 2025-01-21 DOI:10.1016/j.physleta.2025.130287

Qianqian Li, Tao Qu, Pei Song, Xing Wei, Yan Zhang, Jibin Fan

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引用次数: 0

Abstract

Graphene-based photodetectors have been proven efficient for photodetection, but its high dark current limits the weak signal detection. To cope with this issue, graphene/Si heterojunction photodetector is fabricated, and when introducing a zinc oxide interlayer, photodetection characteristics of graphene/Si heterojunction photodetector are greatly improved. Compared with that of the graphene/Si heterojunction photodetector, inserting an ∼10 nm zinc oxide interlayer in graphene/Si heterojunction photodetector resulted in significant decrease in the dark current and increase in the photocurrent, especially in the wavelength range of 400∼460 nm. The responsivity, detectivity and external quantum efficiency of Gr/ZnO/Si photodetector also show greatly improved compared to Gr/Si photodetector. The improvement of the photodetection characteristics is mainly attributed to effective modification of the interface state, a higher barrier height value and enhancement of light absorption provided by zinc oxide interlayer.

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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.