NICOP - Two-Dimensional Transition Metal Transition Dichalcogenides Synthesized by Large-Area Sputtering Method
Abstract
AbstractTwo-dimensional (2D) layered transition metal dichalcogenides (TMDs) have receivedsignificant attention recently because of their unique low-dimensional physical properties that may open up new opportunities for nanoelectronics, optoelectronics, spintronics, vallytronics, etc. However, a general material synthesis strategy for large-area, high-quality TMDs remains challenging, which prevents us from systematically evaluating the properties of arbitrary MX2 composition (M=Mo, W; X=S, Se, Te). This project will develop a new and general route for TMD synthesis based on the magnetron sputtering technique. Comparing with the conventional exfoliation or CVD synthesis techniques, the sputtered method provides superior area scalability and layer-by-layer controllability. More importantly, it has the potential to synthesize the Te-based TMD materials, which show a number of extremely interesting properties, such as smaller band gap, semimetal-semiconductor transition, giant magnetoresistance, strong spin-orbit coupling, etc. This will significantly speed up our understanding on the material-dependent low-dimensional physics in a large amount of 2D TMD materials. In the first year, we will optimize the sputtered MoS2 and develop the process for sputtered WTe2 and MoTe2. In the second year, the TMD ultra-thin-body transistor will be fabricated to evaluate the electrical characteristics of TMD films and the effects of various techniques to improve grain sizes. In the third year, the effect of impurity doping and ternary alloy, the 1T -2H semimetal-semiconductor transition and the valley/spin polarization in the Te-based TMD materials will be investigated.Once the high-quality sputtered TMDs can be successfully synthesized, samples can be provided to those interested in TMD research worldwide, including the research teams collaborating with ONR and AOARD, to speed up the research on 2D TMDs. By using the requested budget as the seed fund, NCTU will provide cost share of at least $350,000 per year in this project, including the funding supports from Ministry of Science and Technology (MOST), Taiwan and our industrial partner, TSMC. Under the support of a national program, we have established arguably most comprehensive TMD synthesis and characterization facility in Taiwan. We believe a significant leverage between this project and our overall research activities could be expected
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 04, 2017
- Source ID
- N629091712022
Entities
People
- Tuo-Hung Hou
Organizations
- National Chiao Tung University
- Office of Naval Research
- United States Navy