| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
2D Materials – Preparation, Properties, Modeling & Applications
|
| Presentation Title |
Study of Contact Metals to Transition Metal Dichalcogenides |
| Author(s) |
Alex Mazzoni, Patrick Taylor, Wendy Sarney, Sina Najmaei, Meg Sales, Peter Litwin, Stephen McDonnell, Yangchen He, Joshua Eickhoff, Robert Boyd, Daniel Rhodes |
| On-Site Speaker (Planned) |
Alex Mazzoni |
| Abstract Scope |
One challenge standing in the way of developing transition metal dichalcogenides (TMDs) into useful devices is the lack of low resistance ohmic contacts. In metal-TMD contacts the Fermi level is usually pinned, resulting in a Schottky barrier that impedes the movement of electrons and limits device performance. Using ultra-high vacuum deposition techniques to deposit the metal, such as molecular beam epitaxy, could allow further control over the metal-TMD interface properties. Our current research is working toward exceeding the state-of-the-art for 2D material contacts, focusing initially on WSe2 with Bi contact layers deposited via molecular beam epitaxy. We will show this technique leads to a uniform Bi layer on silicon dioxide and WSe2, in contrast to Bi deposited via a standard cleanroom high vacuum evaporator. We investigate the Bi-WSe2 interface electrically via field-effect transistor structures and report on the wide-ranging electronic properties when using WSe2 synthesized by different growth methods. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Nanotechnology, Electronic Materials |