Visible-to-near-infrared photodetector based on graphene–MoTe<sub>2</sub>–graphere heterostructure<xref rid="cpb_28_11_117802fn1" ref-type="fn">*</xref><fn id="cpb_28_11_117802fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant No. 21405109) and the Seed Foundation of State Key Laboratory of Precision Measurement Technology and Instruments, China (Pilt No. 1710).</p></fn>

Visible-to-near-infrared photodetector based on graphene–MoTe₂–graphere heterostructure**

Project supported by the National Natural Science Foundation of China (Grant No. 21405109) and the Seed Foundation of State Key Laboratory of Precision Measurement Technology and Instruments, China (Pilt No. 1710).

Hu Rui-Xue, Ma Xin-Li, An Chun-Ha, Liu Jing^†

(a) Schematic diagram of graphene–MoTe₂–graphene vertical vdWs heterostructure. (b) Optical image of heterostructure. The scale bar is 5 μm. (c) AFM image of vertical heterostructure. (d) Height profile of MoTe₂ and graphene flakes, measured at red lines marked in panel (c). Raman spectrum of (e) MoTe₂ and (f) graphene in vertical heterojunction. (g) Transfer curve of the device under dark and 550-nm light illumination. (h) Dynamic photoresponse of heterojunction at V_ds = 0.2 V.