Fig. 1From: Pronounced Photovoltaic Response from Multi-layered MoTe2 Phototransistor with Asymmetric Contact Form a Optical image and AFM image of multi-layered MoTe2 phototransistor. The scale bars are 5 μm. b Raman spectrum of multi-layered MoTe2 phototransistor with 514-nm laser excitation. c Transfer characteristics and d output characteristics of multi-layered MoTe2 phototransistorBack to article page