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Two-dimensional monoelemental germanene nanosheets: facile preparation and optoelectronic applications

Abstract

Due to high carrier mobility, excellent stability and tunable optical properties, 2D monoelemental germanene has attracted great attention in recent years. Herein, few-layer 2D germanium nanosheets (GeNS) are obtained via a facile liquid-phase exfoliated method and fabricated as electrode materials to assemble self-powered photo-electrochemical (PEC) type photodetectors. Such 2D GeNS based PEC-type photodetector exhibits a responsivity of 7.81 µA/W, a detectivity of 5.2× 109 Jones, and rise and decay times of 0.15 s and 0.76 s under simulated light. At the specific wavelength of 380 nm, it demonstrates a responsivity of 340.91 μA W−1 and a detectivity of 1.82× 1011 jones. Additionally, GeNS based PEC-type device also exhibits good air-stability (over one-month). Present work demonstrates low-cost and facile fabrication techniques for preparing 2D monoelemental germanene and suggest as prepared GeNS is a promising candidate for PEC-type photodetectors application.

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Article information


Submitted
15 Aug 2020
Accepted
24 Sep 2020
First published
24 Sep 2020

This article is Open Access

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Communication

Two-dimensional monoelemental germanene nanosheets: facile preparation and optoelectronic applications

C. Li, J. Kang, X. Jianlei, Y. Wang, L. Zhou, H. Hu, X. Li, J. He, B. Wang and H. Zhang, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/D0TC03892J

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