Si-doped MoS2 Sheet as Phosgene Gas Sensor: A First Principles Study

Phosgene sensing capability of pristine and Si embedded into the S vacancy of MoS2 sheet is demonstrated using density functional theory (DFT) calculations. Phosgene is more strongly adsorbed on the Si-doped MoS2 as compared to pristine MoS2. The transport calculations show Si-doped MoS2 is more sensitive to the phosgene gas molecule than the undoped version. It is revealed that the sensitivity of MoS2-based gas sensor towards phosgene gas molecule can be effectively improved by introducing Si dopant.