Cargando…

Enhancing and quantifying spatial homogeneity in monolayer WS(2)

Controlling the radiative properties of monolayer transition metal dichalcogenides is key to the development of atomically thin optoelectronic devices applicable to a wide range of industries. A common problem for exfoliated materials is the inherent disorder causing spatially varying nonradiative l...

Descripción completa

Detalles Bibliográficos
Autores principales: Cao, Yameng, Wood, Sebastian, Richheimer, Filipe, Blakesley, J., Young, Robert J., Castro, Fernando A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8295334/
https://www.ncbi.nlm.nih.gov/pubmed/34290292
http://dx.doi.org/10.1038/s41598-021-94263-9
_version_ 1783725413221007360
author Cao, Yameng
Wood, Sebastian
Richheimer, Filipe
Blakesley, J.
Young, Robert J.
Castro, Fernando A.
author_facet Cao, Yameng
Wood, Sebastian
Richheimer, Filipe
Blakesley, J.
Young, Robert J.
Castro, Fernando A.
author_sort Cao, Yameng
collection PubMed
description Controlling the radiative properties of monolayer transition metal dichalcogenides is key to the development of atomically thin optoelectronic devices applicable to a wide range of industries. A common problem for exfoliated materials is the inherent disorder causing spatially varying nonradiative losses and therefore inhomogeneity. Here we demonstrate a five-fold reduction in the spatial inhomogeneity in monolayer WS(2), resulting in enhanced overall photoluminescence emission and quality of WS(2) flakes, by using an ambient-compatible laser illumination process. We propose a method to quantify spatial uniformity using statistics of spectral photoluminescence mapping. Analysis of the dynamic spectral changes shows that the enhancement is due to a spatially sensitive reduction of the charged exciton spectral weighting. The methods presented here are based on widely adopted instrumentation. They can be easily automated, making them ideal candidates for quality assessment of transition metal dichalcogenide materials, both in the laboratory and industrial environments.
format Online
Article
Text
id pubmed-8295334
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-82953342021-07-22 Enhancing and quantifying spatial homogeneity in monolayer WS(2) Cao, Yameng Wood, Sebastian Richheimer, Filipe Blakesley, J. Young, Robert J. Castro, Fernando A. Sci Rep Article Controlling the radiative properties of monolayer transition metal dichalcogenides is key to the development of atomically thin optoelectronic devices applicable to a wide range of industries. A common problem for exfoliated materials is the inherent disorder causing spatially varying nonradiative losses and therefore inhomogeneity. Here we demonstrate a five-fold reduction in the spatial inhomogeneity in monolayer WS(2), resulting in enhanced overall photoluminescence emission and quality of WS(2) flakes, by using an ambient-compatible laser illumination process. We propose a method to quantify spatial uniformity using statistics of spectral photoluminescence mapping. Analysis of the dynamic spectral changes shows that the enhancement is due to a spatially sensitive reduction of the charged exciton spectral weighting. The methods presented here are based on widely adopted instrumentation. They can be easily automated, making them ideal candidates for quality assessment of transition metal dichalcogenide materials, both in the laboratory and industrial environments. Nature Publishing Group UK 2021-07-21 /pmc/articles/PMC8295334/ /pubmed/34290292 http://dx.doi.org/10.1038/s41598-021-94263-9 Text en © The Author(s) 2021, corrected publication 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Cao, Yameng
Wood, Sebastian
Richheimer, Filipe
Blakesley, J.
Young, Robert J.
Castro, Fernando A.
Enhancing and quantifying spatial homogeneity in monolayer WS(2)
title Enhancing and quantifying spatial homogeneity in monolayer WS(2)
title_full Enhancing and quantifying spatial homogeneity in monolayer WS(2)
title_fullStr Enhancing and quantifying spatial homogeneity in monolayer WS(2)
title_full_unstemmed Enhancing and quantifying spatial homogeneity in monolayer WS(2)
title_short Enhancing and quantifying spatial homogeneity in monolayer WS(2)
title_sort enhancing and quantifying spatial homogeneity in monolayer ws(2)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8295334/
https://www.ncbi.nlm.nih.gov/pubmed/34290292
http://dx.doi.org/10.1038/s41598-021-94263-9
work_keys_str_mv AT caoyameng enhancingandquantifyingspatialhomogeneityinmonolayerws2
AT woodsebastian enhancingandquantifyingspatialhomogeneityinmonolayerws2
AT richheimerfilipe enhancingandquantifyingspatialhomogeneityinmonolayerws2
AT blakesleyj enhancingandquantifyingspatialhomogeneityinmonolayerws2
AT youngrobertj enhancingandquantifyingspatialhomogeneityinmonolayerws2
AT castrofernandoa enhancingandquantifyingspatialhomogeneityinmonolayerws2