Photodetectors based on junctions of two-dimensional transition metal dichalcogenides
Wei Xia1, Yan Fa-Guang1, Shen Chao1, Lv Quan-Shan1, Wang Kai-You1, 2, †
       

(color online) (a) Optical micrograph of the MoS2/WS2 vertical heterojunction device.[91] (b) Raman spectra of MoS2, WS2 and MoS2/WS2.[91] (c) Optical image of vertical MoS2/WS2 heterojunctions grown by chemical vapor deposition.[92] (d) I–V measurement across a MoS2/WS2 heterointerface.[92]