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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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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 |
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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 |
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