Author(s): Zhu, ZW (Zhu, Zhaowei); Wang, ZX (Wang, Zixi); Cheng, CT (Cheng, Chuantong); Li, DC (Li, Decai); Chen, HD (Chen, Hongda)

Source: MATERIALS LETTERS Volume: 289 Article Number: 129393 DOI: 10.1016/j.matlet.2021.129393 Published: APR 15 2021

Abstract: Photodetectors with ultrahigh responsivity are meaningful for weak optical signal detection in the fields of biomedicine science and environmental monitoring. Graphene/Si hybrid photodetectors with ultrahigh photoresponsivity have already been reported. However, with all atoms exposed to the environment, graphene-based devices often show low stability. Here, the PMMA layer assisting the graphene transfer process has been retained on the surface of graphene during the fabrication process of the graphene/Si hybrid photodetector, and a high stability graphene photodetector with ultrahigh responsivity (>10(6) A W-1 for white LED illumination) has been successfully demonstrated. The fabricated graphene/Si hybrid photodetectors may have the potential to be utilized in functional near-infrared spectroscopy systems or underwater wireless optical communication systems for weak optical signal detection. (C) 2021 Published by Elsevier B.V.

Accession Number: WOS:000621603700009

ISSN: 0167-577X

eISSN: 1873-4979

Full Text: https://www.sciencedirect.com/science/article/pii/S0167577X21000902?via%3Dihub