Investigation of Single-Wall MoS2 Monolayer Flakes Grown by Chemical Vapor Deposition

• DOI: 10.1007/s40820-015-0064-2
• Publication Date: 2015-10-05T10:38:06Z
• Authors: Nihan Kosku Perkgoz; Mehmet Bay
• Keywords: Molybdenum disulfide; Deposition

Recently, two-dimensional monolayer molybdenum disulfide (MoS2), a transition metal dichalcogenide, has received considerable attention due to its direct bandgap, which does not exist in bulk form, enabling applications optoelectronics and also thanks enhanced catalytic activity allows it be used for energy harvesting. However, growth of controllable high-quality monolayers is still matter research the parameters determining mechanism are completely clear. In this work, chemical vapor deposition utilized grow MoS2 flakes while duration temperature effect have been systematically varied develop better understanding film formation influence these on quality flakes. Different from previous studies, SEM results show that single-layer do necessarily flat surface, but rather they can stay erect inclined at different angles indicating possible gas-phase reactions allowing formation. We revealed process influences amount MoO3/MoO2 within network. The homogeneity number layers depend change desorption-adsorption radicals together with sulfurization rates, and, inasmuch, careful optimization crucial. Therefore, distinct general trend formation, our films rough heterogeneous nanowalls. Despite roughness heterogeneity, we observe strong photoluminescence located around 675 nm.