Jump to main content
Jump to site search

Issue 40, 2016
Previous Article Next Article

Two-dimensional exciton properties in monolayer semiconducting phosphorus allotropes

Author affiliations

Abstract

Excitons play a key role in technological applications since they have a strong influence on determining the efficiency of photovoltaic devices. Recently, it has been shown that the allotropes of phosphorus possess an optical band gap that can be tuned over a wide range of values including the near-infrared and visible spectra, which would make them promising candidates for optoelectronic applications. In this work we carry out ab initio many-body perturbation theory calculations to study the excitonic effects on the optical properties of two-dimensional phosphorus allotropes: the case of blue and black monolayers. We elucidate the most relevant optical transitions, exciton binding energy spectrum as well as real-space exciton distribution, particularly focusing on the absorption spectrum dependence on the incident light polarization. In addition, based on our results, we use a set of effective hydrogenic models, in which the electron–hole Coulomb interaction is included to estimate exciton binding energies and radii. Our results show an excellent agreement between the many-body methodology and the effective models.

Graphical abstract: Two-dimensional exciton properties in monolayer semiconducting phosphorus allotropes

Back to tab navigation

Supplementary files

Article information


Submitted
11 Aug 2016
Accepted
13 Sep 2016
First published
13 Sep 2016

Phys. Chem. Chem. Phys., 2016,18, 27829-27836
Article type
Paper

Two-dimensional exciton properties in monolayer semiconducting phosphorus allotropes

C. E. P. Villegas, A. S. Rodin, A. Carvalho and A. R. Rocha, Phys. Chem. Chem. Phys., 2016, 18, 27829
DOI: 10.1039/C6CP05566D

Social activity

Search articles by author

Spotlight

Advertisements