Fig. 2

Photoresponse of multi-layered MoTe₂ phototransistor illuminated by 637-nm wavelength laser in ambient condition. a I _sd vs. V _sd curves at V _bg = 0 V as illumination power increases. b I _sd vs. V _sd curves at V _bg = 5 V as illumination power increases. c V _OC and I _SC as a function of illumination power. d Output current for biased voltage loaded on the source and drain electrode, respectively