Mn-promoted growth and photoluminescence of molybdenum disulphide monolayer

Abstract

Molybdenum disulphide (MoS 2 ) monolayer is a two-dimensional semiconductor material with potential applications in nano electronic devices. However, it is still a challenge to reproducibly synthesize single layer MoS 2 in high quality. Herein, we report the growth of monolayer of MoS 2 on the SiO 2 /Si substrate with manganese heterogeneous nucleation. It was shown that the Mn promotes the growth of monolayer MoS 2 via heterogeneous nucleation. The growth temperature range expanded two-fold, the nucleation density increased as well. The monolayer prepared in the presence of Mn exhibits a unique red emission peak at 732 nm at room temperature compared to the sample in the absence of Mn.