Fig. 1
From: The Photodetectors Based on Lateral Monolayer MoS2/WS2 Heterojunctions
Material characterization results of the as-grown lateral monolayer MoS2/WS2 heterostructure. (a) The optical image of the lateral monolayer MoS2/WS2 heterojunction. (b) The Raman spectrum obtained from the site marked with 1, 2 and 3 in (a), respectively. The Raman mapping image (c), PL mapping images of MoS2 region (d) and WS2 region (e) from the red framed area in (a). The corresponding false-color bar is inserted at the bottom of (c)–(e). (f) The corresponding cross-sectional height profile of the blue (between WS2 and MoS2) and white (between WS2 and substrate) lines marked in AFM morphology image