Figure 5
From: Photodiode-Like Behavior and Excellent Photoresponse of Vertical Si/Monolayer MoS2 Heterostructures

The variation of surface potential of n- and p-Si/MoS2 heterostructures without and upon illumination with light wavelength of 365 nm at power density of 10 mW/cm2.
(a)–(c) The topography and the corresponding surface potential maps of n-Si/MoS2 heterostructures before and after illumination, respectively. (d)–(f) The topography and the corresponding surface potential maps of p-Si/MoS2 heterostructures before and after illumination, respectively. (g) and (h) are the corresponding potential section profiles of n- and p-Si/MoS2 heterostructures, respectively.