Comparisons of schematic diagrams, band structures and electrical properties between conventional and uniformly doped MoS₂/MoTe₂ JFET. (a, b) Schematic diagrams and atomic structures of the two JFETs. The red and green spheres represent MoS₂, the blue and green spheres represent MoTe₂, and the yellow spheres represent Au atoms. (c) The band diagrams of Au, MoTe₂, and MoS₂ before contact. (d, e) Band diagrams of the undoped (d) and Au-doped (e) MoS₂/MoTe₂ heterojunction. The ΔE_V1 is the valence band offset when the MoS₂/MoTe₂ pn junction formed, which is about 0.6 eV. The ΔE_V2 is the Schottky barrier height between Au and MoTe₂, which is about 0.3 eV. The ΔE_V3 is the valence band offset of the Au-doped MoS₂/MoTe₂ pn junction, while the ΔE_V3 is approximately equal to ΔE_V1 plus ΔE_V2. (f) Transfer characteristics comparison with the V_GS of 2 V. (g) The mobilities of undoped and doped JFETs with the V_GS at 2 V.