Large-area 2D/3D MoS2-MoO2 heterostructures with thermally stable exciton and intriguing electrical transport behaviors
XIAO, Zhiyong
Department of Physics and Astronomy [Lincoln]
Nebraska Center for Materials and Nanoscience
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Department of Physics and Astronomy [Lincoln]
Nebraska Center for Materials and Nanoscience
XIAO, Zhiyong
Department of Physics and Astronomy [Lincoln]
Nebraska Center for Materials and Nanoscience
Department of Physics and Astronomy [Lincoln]
Nebraska Center for Materials and Nanoscience
HONG, Xia
Department of Physics and Astronomy [Lincoln]
Nebraska Center for Materials and Nanoscience
< Réduire
Department of Physics and Astronomy [Lincoln]
Nebraska Center for Materials and Nanoscience
Langue
en
Article de revue
Ce document a été publié dans
Advanced Electronic Materials. 2017, vol. 3, n° 7, p. 1600335
Wiley
Résumé en anglais
To date, scale-up fabrication of transition metal dichalcogenide (TMD-) based 2D/2D or 2D/3D heterostructures with specific functionalities is still a great challenge. This study, for the first time, reports on the ...Lire la suite >
To date, scale-up fabrication of transition metal dichalcogenide (TMD-) based 2D/2D or 2D/3D heterostructures with specific functionalities is still a great challenge. This study, for the first time, reports on the controllable synthesis of large-area and continuous 2D/3D semiconductor/metal heterostructures consisting of monolayer MoS2 and bulk MoO2 with unique electrical and optical properties via one-step, vapor-transport-assisted rapid thermal processing. The temperature-dependent electrical transport measurements reveal that the 2D/3D MoS2–MoO2 heterostructure grown on SiO2/Si substrates exhibits metallic phase, while this heterostructure becomes a low-resistance semiconductor when it is grown on fused silica, which is attributed to the different degrees of sulfurization on different substrates, as being confirmed by surface potential analyses. Photoluminescence measurements taken on the MoS2–MoO2 heterostructures reveal the simultaneous presence of both negative trions and neutral excitons, while only neutral excitons are observed in the monolayer MoS2. The trion-binding energy is determined to be ≈27 meV, and the trion signal persists up to 330 K, indicating significant stability at room temperature. This work not only provides a new platform for understanding the intriguing physics in TMD-based heterostructures but also enables the design of more complicated devices with potential applications in nanoelectronics and nanophotonics.< Réduire
Mots clés en anglais
rapid thermal processing
2D/3D semiconductor/metal heterostructure
transition metal dichalcogenides
electrical transport
optical transition
Origine
Importé de halUnités de recherche