Exciton dynamics in monolayer graphene grown on a Cu(111) surface

Abstract We have characterized the carrier dynamics of the excitonic emission emerging from a monolayer of graphene grown on a Cu(111) surface. Excitonic emission from the graphene, with strong and sharp peaks both with a full-width at half-maximum of 2.7 meV, was observed near ~3.16 and ~3.18 eV at...

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Autores principales:	Youngsin Park, Guanhua Ying, Robert A. Taylor, Chan C. Hwang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ee10f67577254a72980c8cd6108bb701
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spelling	oai:doaj.org-article:ee10f67577254a72980c8cd6108bb7012021-12-02T18:46:55ZExciton dynamics in monolayer graphene grown on a Cu(111) surface10.1038/s41699-021-00252-x2397-7132https://doaj.org/article/ee10f67577254a72980c8cd6108bb7012021-07-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00252-xhttps://doaj.org/toc/2397-7132Abstract We have characterized the carrier dynamics of the excitonic emission emerging from a monolayer of graphene grown on a Cu(111) surface. Excitonic emission from the graphene, with strong and sharp peaks both with a full-width at half-maximum of 2.7 meV, was observed near ~3.16 and ~3.18 eV at 4.2 K. The carrier recombination parameters were studied by measuring both temperature-dependent and time-resolved photoluminescence. The intensity variation with temperature of these two peaks shows an opposing trend. The time-resolved emission was modelled using coupled differential equations and the decay time was found to be dominated by carrier trapping and Auger recombination as the temperature increased.Youngsin ParkGuanhua YingRobert A. TaylorChan C. HwangNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-5 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 Youngsin Park Guanhua Ying Robert A. Taylor Chan C. Hwang Exciton dynamics in monolayer graphene grown on a Cu(111) surface
description	Abstract We have characterized the carrier dynamics of the excitonic emission emerging from a monolayer of graphene grown on a Cu(111) surface. Excitonic emission from the graphene, with strong and sharp peaks both with a full-width at half-maximum of 2.7 meV, was observed near ~3.16 and ~3.18 eV at 4.2 K. The carrier recombination parameters were studied by measuring both temperature-dependent and time-resolved photoluminescence. The intensity variation with temperature of these two peaks shows an opposing trend. The time-resolved emission was modelled using coupled differential equations and the decay time was found to be dominated by carrier trapping and Auger recombination as the temperature increased.
format	article
author	Youngsin Park Guanhua Ying Robert A. Taylor Chan C. Hwang
author_facet	Youngsin Park Guanhua Ying Robert A. Taylor Chan C. Hwang
author_sort	Youngsin Park
title	Exciton dynamics in monolayer graphene grown on a Cu(111) surface
title_short	Exciton dynamics in monolayer graphene grown on a Cu(111) surface
title_full	Exciton dynamics in monolayer graphene grown on a Cu(111) surface
title_fullStr	Exciton dynamics in monolayer graphene grown on a Cu(111) surface
title_full_unstemmed	Exciton dynamics in monolayer graphene grown on a Cu(111) surface
title_sort	exciton dynamics in monolayer graphene grown on a cu(111) surface
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ee10f67577254a72980c8cd6108bb701
work_keys_str_mv	AT youngsinpark excitondynamicsinmonolayergraphenegrownonacu111surface AT guanhuaying excitondynamicsinmonolayergraphenegrownonacu111surface AT robertataylor excitondynamicsinmonolayergraphenegrownonacu111surface AT chanchwang excitondynamicsinmonolayergraphenegrownonacu111surface
_version_	1718377714350555136

Exciton dynamics in monolayer graphene grown on a Cu(111) surface

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