| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
|
| Presentation Title |
Wafer-scale Epitaxial Growth of 2D Transition Metal Dichalcogenides |
| Author(s) |
Joan M. Redwing |
| On-Site Speaker (Planned) |
Joan M. Redwing |
| Abstract Scope |
Two-dimensional (2D) transition metal dichalcogenides (TMDs) comprise a compelling class of materials with intriguing properties that arise from their ultra-thin form, thickness-dependent band structure, large exciton binding energies and spin-valley polarization physics. Our research is aimed at the development of an epitaxial growth technology for semiconducting TMDs (MoS2, WSe2, etc.) based on metalorganic chemical vapor deposition (MOCVD) and focuses on understanding fundamentals of nucleation, epitaxy and anisotropic growth that are characteristic of van der Waals crystals. Point defects and surface steps are used to control the nucleation density and orientation of TMD domains as demonstrated for epitaxial growth on hBN and sapphire substrates, respectively. TMD monolayers grown by MOCVD on 2” sapphire exhibit optical and transport properties approaching that of single crystal flakes exfoliated from bulk crystals. Prospects and challenges associated with the epitaxial growth of vertical and lateral TMD heterostructures will also be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Electronic Materials, Nanotechnology |