Large-Area 2D/3D MoS2-MoO2 Heterostructures with Thermally Stable Exciton and Intriguing Electrical Transport Behaviors
- Univ. of Nebraska, Lincoln, NE (United States)
- Boston Univ., MA (United States)
- Beijing Inst. of Technology, Beijing (China)
- Inst. de Chimie de la Matière Condensée de Bordeaux (France)
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.
- Research Organization:
- Univ. of Nebraska, Lincoln, NE (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0016153
- OSTI ID:
- 1533054
- Alternate ID(s):
- OSTI ID: 1401783
- Journal Information:
- Advanced Electronic Materials, Vol. 3, Issue 7; ISSN 2199-160X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Long‐Term, High‐Voltage, and High‐Temperature Stable Dual‐Mode, Low Dark Current Broadband Ultraviolet Photodetector Based on Solution‐Cast r‐GO on MBE‐Grown Highly Resistive GaN
|
journal | May 2019 |
Mixed-dimensional 2D/3D heterojunctions between MoS 2 and Si(100)
|
journal | January 2018 |
Accelerated carrier recombination by grain boundary/edge defects in MBE grown transition metal dichalcogenides
|
journal | May 2018 |
Investigation of atomic and electronic properties of 2D-MoS 2 /3D-GaN mixed-dimensional heterostructures
|
journal | July 2019 |
Accelerated Carrier Recombination by Grain Boundary/Edge Defects in MBE Grown Transition Metal Dichalcogenides | preprint | January 2018 |
Similar Records
Pressure-Dependent Light Emission of Charged and Neutral Excitons in Monolayer MoSe2
Persistent photoconductivity in two-dimensional Mo1-xW xSe2–MoSe2 van der Waals heterojunctions