The fabrication of large-area and uniform bilayer MoS2 thin films

Here, an approach for synthesizing large-area and high-quality MoS
₂
flakes was developed. In addition, we made up the MoS
₂
photoelectric detector and studied the photocurrent response of the detector. We firstly used the ceramic pieces to control MoO
₃
evaporation for obtaining large-area MoS
₂
. Our CVD reaction is hydrogen free, very simple operation, high repetition rate and cost saving. The obtained MoS
₂
flakes exhibited large-area with lengths up to 400-500 micrometers. Through analyzing optical microscopy (OM), Raman and atomic force microscopy (AFM), we confirm the MoS
₂
thin film is bilayer. And the photoelectric characteristic experiment shows that the photoelectric detector has sensitive photoelectric response with the fine stability.