Issue 46, 2020

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 considerable attention in recent years. Herein, few-layered 2D germanium nanosheets (GeNS) were 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 photodetectors exhibit a responsivity of 7.81 μA W−1, a detectivity of 5.2 × 109 Jones, and the rise and decay times of 0.15 s and 0.76 s, respectively, 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. In addition, the GeNS-based PEC-type device also exhibits good air-stability (over one-month). The present work demonstrates low-cost and facile fabrication techniques for preparing 2D monoelemental germanene and suggests that the as-prepared GeNS is a promising candidate for PEC-type photodetector applications.

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

Supplementary files

Article information

Article type
Communication
Submitted
15 Aug. 2020
Accepted
24 Sept. 2020
First published
24 Sept. 2020
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2020,8, 16318-16325

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

C. Li, J. Kang, J. Xie, Y. Wang, L. Zhou, H. Hu, X. Li, J. He, B. Wang and H. Zhang, J. Mater. Chem. C, 2020, 8, 16318 DOI: 10.1039/D0TC03892J

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