Fabrication and investigation of the optoelectrical properties of MoS ₂/CdS heterojunction solar cells

Abstract

Molybdenum disulfide (MoS ₂)/cadmium sulfide (CdS) heterojunction solar cells were successfully synthesized via chemical bath deposition (CBD) and chemical vapor deposition (CVD). The as-grown CdS film on a fluorine tin oxide (FTO) substrate deposited by CBD is continuous and compact. The MoS ₂ film deposited by CVD is homogeneous and continuous, with a uniform color and a thickness of approximately 10 nm. The optical absorption range of the MoS ₂/CdS heterojunction covers the visible and near-infrared spectral regions of 350 to 800 nm, which is beneficial for the improvement of solar cell efficiency. Moreover, the MoS ₂/CdS solar cell exhibits good current-voltage ( I- V) characteristics and pronounced photovoltaic behavior, with an open-circuit voltage of 0.66 V and a short-circuit current density of 0.227 × 10 ^-6 A/cm ², comparable to the results obtained from other MoS ₂-based solar cells. This research is critical to investigate more efficient and stable solar cells based on graphene-like materials in the future.