Fig. 3From: Pronounced Photovoltaic Response from Multi-layered MoTe2 Phototransistor with Asymmetric Contact FormSpatial-resolved photocurrent images of D1 as a function of gate voltage. a The optical image together with the electrical setup. b Spatial-resolved photocurrent images at V bg = − 5, 0, and 5 V, respectively. c I PC profile collected from the black dashed line in Fig. 3b. d Corresponding potential profiles at V bg = − 5, 0, and 5 V, respectively. The scale bars are 5 μm in all figuresBack to article page