What Has Been Achieved
A photoluminescence feature has been identified as excitons bound to charged sulfur vacancies in 2D WS2.
Importance of Achievement
The study identifies a fast, inexpensive, and non-destructive characterization method to assess the quality of 2D transition metal dichalcogenide crystals.
Unique Features of the MIP That Enabled Project
Close collaboration between synthesis, characterization, and theory efforts.
V. Carozo, Y. Wang, K. Fujisawa, B. R. Carvalho, A. McCreary, S. Feng, Z. Lin, C. Zhou, N. Perea-López, A. L. Elías, B. Kabius, V. H. Crespi, and M. Terrones, “Optical identification of sulfur vacancies: Bound excitons at the edges of monolayer tungsten disulfide”, Sci. Adv. 3, e1602813 (2017).