Issue 25, 2017

Layer-dependent electronic properties of phosphorene-like materials and phosphorene-based van der Waals heterostructures

Abstract

Black phosphorus is a layered semiconducting allotrope of phosphorus with high carrier mobility. Its monolayer form, phosphorene, is an extremely fashionable two-dimensional material which has promising potential in transistors, optoelectronics and electronics. However, phosphorene-like analogues, especially phosphorene-based heterostructures and their layer-controlled electronic properties, are rarely systematically investigated. In this paper, the layer-dependent structural and electronic properties of phosphorene-like materials, i.e., mono- and few-layer MXs (M = Sn, Ge; X = S, Se), are first studied via first-principles calculations, and then the band edge position of these MXs as well as mono- and few-layer phosphorene are aligned. It is revealed that van der Waals heterostructures with a Moiré superstructure formed by mutual coupling among MXs and among MXs and few-layer phosphorene are able to show type-I or type-II characteristics and a I–II or II–I transition can be induced by adjusting the number of layers. Our work is expected to yield a new family of phosphorene-based semiconductor heterostructures with tunable electronic properties through altering the number of layers of the composite.

Graphical abstract: Layer-dependent electronic properties of phosphorene-like materials and phosphorene-based van der Waals heterostructures

Supplementary files

Article information

Article type
Paper
Submitted
19 mars 2017
Accepted
26 avr. 2017
First published
02 mai 2017

Nanoscale, 2017,9, 8616-8622

Layer-dependent electronic properties of phosphorene-like materials and phosphorene-based van der Waals heterostructures

Y. C. Huang, X. Chen, C. Wang, L. Peng, Q. Qian and S. F. Wang, Nanoscale, 2017, 9, 8616 DOI: 10.1039/C7NR01952A

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