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Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2)
Monolayer MoS(2) (1L-MoS(2)) has photoluminescence (PL) properties that can greatly vary via transition between neutral and charged exciton PLs depending on carrier density. Here, for the first time, we present a chemical doping method for reversible transition between neutral and charged excitons o...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4761959/ https://www.ncbi.nlm.nih.gov/pubmed/26898238 http://dx.doi.org/10.1038/srep21405 |
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author | Kim, Y. Jhon, Y. I. Park, J. Kim, C. Lee, S. Jhon, Y. M. |
author_facet | Kim, Y. Jhon, Y. I. Park, J. Kim, C. Lee, S. Jhon, Y. M. |
author_sort | Kim, Y. |
collection | PubMed |
description | Monolayer MoS(2) (1L-MoS(2)) has photoluminescence (PL) properties that can greatly vary via transition between neutral and charged exciton PLs depending on carrier density. Here, for the first time, we present a chemical doping method for reversible transition between neutral and charged excitons of 1L-MoS(2) using chlorine-hydrogen-based plasma functionalization. The PL of 1L-MoS(2) is drastically increased by p-type chlorine plasma doping in which its intensity is easily tuned by controlling the plasma treatment duration. We find that despite their strong adhesion, a post hydrogen plasma treatment can very effectively dedope chlorine adatoms in a controllable way while maintaining robust structural integrity, which enables well-defined reversible PL control of 1L-MoS(2). After exhaustive chlorine dedoping, the hydrogen plasma process induces n-type doping of 1L-MoS(2), degrading the PL further, which can also be recovered by subsequent chlorine plasma treatment, extending the range of tunable PL into a bidirectional regime. This cyclically-tunable carrier doping method can be usefully employed in fabricating highly-tunable n- and p-type domains in monolayer transition-metal dichalcogenides suitable for two-dimensional electro-optic modulators, on-chip lasers, and spin- and valley-polarized light-emitting diodes. |
format | Online Article Text |
id | pubmed-4761959 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-47619592016-02-29 Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) Kim, Y. Jhon, Y. I. Park, J. Kim, C. Lee, S. Jhon, Y. M. Sci Rep Article Monolayer MoS(2) (1L-MoS(2)) has photoluminescence (PL) properties that can greatly vary via transition between neutral and charged exciton PLs depending on carrier density. Here, for the first time, we present a chemical doping method for reversible transition between neutral and charged excitons of 1L-MoS(2) using chlorine-hydrogen-based plasma functionalization. The PL of 1L-MoS(2) is drastically increased by p-type chlorine plasma doping in which its intensity is easily tuned by controlling the plasma treatment duration. We find that despite their strong adhesion, a post hydrogen plasma treatment can very effectively dedope chlorine adatoms in a controllable way while maintaining robust structural integrity, which enables well-defined reversible PL control of 1L-MoS(2). After exhaustive chlorine dedoping, the hydrogen plasma process induces n-type doping of 1L-MoS(2), degrading the PL further, which can also be recovered by subsequent chlorine plasma treatment, extending the range of tunable PL into a bidirectional regime. This cyclically-tunable carrier doping method can be usefully employed in fabricating highly-tunable n- and p-type domains in monolayer transition-metal dichalcogenides suitable for two-dimensional electro-optic modulators, on-chip lasers, and spin- and valley-polarized light-emitting diodes. Nature Publishing Group 2016-02-22 /pmc/articles/PMC4761959/ /pubmed/26898238 http://dx.doi.org/10.1038/srep21405 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Kim, Y. Jhon, Y. I. Park, J. Kim, C. Lee, S. Jhon, Y. M. Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) |
title | Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) |
title_full | Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) |
title_fullStr | Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) |
title_full_unstemmed | Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) |
title_short | Plasma functionalization for cyclic transition between neutral and charged excitons in monolayer MoS(2) |
title_sort | plasma functionalization for cyclic transition between neutral and charged excitons in monolayer mos(2) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4761959/ https://www.ncbi.nlm.nih.gov/pubmed/26898238 http://dx.doi.org/10.1038/srep21405 |
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