Unveiling defect-mediated carrier dynamics in monolayer semiconductors by spatiotemporal microwave imaging
Unveiling defect-mediated carrier dynamics in monolayer semiconductors by spatiotemporal microwave imaging
Significance Defects in two-dimensional (2D) transition-metal dichalcogenides play a crucial role in controlling the spatiotemporal dynamics of photogenerated charge carriers, which remain poorly understood to date. In this paper, the defect-mediated carrier diffusion and recombination in WS 2 monolayers are quantitatively investigated by laser-illuminated microwave impedance microscopy. Surprisingly, the photoresponse …