In-situ fabrication of PtSe2/MoS2 van der Waals heterojunction for self-powered and broadband photodetector

In this study, we have achieved the successful fabrication of PtSe2/MoS2 heterojunction through a novel hybrid approach. Platinum (Pt) sputtering-selenization two-step growth method is adopted enabling the direct growth of PtSe2 thin films on MoS2 nanosheet. With the utilization of the photovoltaic effect (PVE) [9], the device demonstrates remarkable self-drive capabilities while exhibiting a wide spectral response spanning from 405 nm to 1550 nm.