Figure 1

(a) A schematic view of the p-GeSe/n-MoSe₂ heterojunction diode. (b) The optical microscope image of the device. (c) An AFM image of the p-GeSe on the SiO₂/Si substrate. (d) The height profile from the AFM. (e) An AFM image of n-MoSe₂ on the SiO₂/Si substrate, and (f) their height profile.