| AVS 65th International Symposium & Exhibition | |
| 2D Materials Focus Topic | Monday Sessions |
| Session 2D+EM+MI+NS+TF-MoM |
| Session: | 2D Materials Growth and Fabrication |
| Presenter: | Thomas Empante, University of California, Riverside |
| Authors: | T.A. Empante, University of California, Riverside Y. Zhou, Stanford University S.A. Naghibi Alvillar, El Camino College E.J. Reed, Stanford University L. Bartels, University of California, Riverside |
| Correspondent: | Click to Email |
Transition metal dichalcogenides (TMDs) have been of interest over the past few decades for their intriguing structural, electronic, and optoelectronic properties, particularly when scaled down to thin films. One of the most interesting TMD materials is molybdenum ditelluride (MoTe2) because of its relative ease to attain multiple phases at room temperature, namely the metallic 1T’ phase and the semiconducting 2H phase. Here we show a facile chemical vapor deposition process to synthesis not only the aforementioned phases but the elusive unreconstructed 1T phase by regulating the cooling rate and the addition of carbon dioxide during the reaction. Our experimental Raman spectroscopy results were compared to theoretical density functional theory calculations which verify the synthesis of all three phases. Electronic transport measurements were also used to characterize the films and show that the newly synthesized 1T phase is in good agreement with theoretical models depicting semi-metallicity as the material shows increased conductivity with elevated temperatures. In addition to the pure phase materials, mixed phase materials, such as 2H/1T, can be synthesized with slight alterations to the parameters leading to enhancements of the 2H phases’ conductivity.