Interlayer charge transfer in supported and suspended MoS(2)/Graphene/MoS(2) vertical heterostructures

In this letter, we report on the optical and structural properties of supported and suspended MoS(2)/Graphene/MoS(2) vertical heterostructures using Raman and photoluminescence (PL) spectroscopies. Vertical heterostructures (VH) are formed by multiple wet transfers on micro-sized holes in SiO(2)/Si...

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Detalles Bibliográficos
Autores principales: Rocha Robledo, Ana K., Flores Salazar, Mario, Muñiz Martínez, Bárbara A., Torres-Rosales, Ángel A., Lara-Alfaro, Héctor F., Del Pozo-Zamudio, Osvaldo, Cerda-Méndez, Edgar A., Jiménez-Sandoval, Sergio, De Luna Bugallo, Andres
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2023
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10368229/
https://www.ncbi.nlm.nih.gov/pubmed/37490510
http://dx.doi.org/10.1371/journal.pone.0283834
Descripción
Sumario:In this letter, we report on the optical and structural properties of supported and suspended MoS(2)/Graphene/MoS(2) vertical heterostructures using Raman and photoluminescence (PL) spectroscopies. Vertical heterostructures (VH) are formed by multiple wet transfers on micro-sized holes in SiO(2)/Si substrates, resulting in VH with different configurations. The strong interlayer coupling is confirmed by Raman spectroscopy. Additionally, we observe an enhancement of the PL emission in the three-layer VH (either support or suspended) compared with bare MoS(2) or MoS(2)/Graphene. This suggests the formation of a spatial type-II band alignment assisted by the graphene layer and thus, the operation of the VH as a n++/metal/n junction.

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