Electrical properties of undoped MoS₂/MoTe₂ JFET. (a) Output characteristics with increased gate voltage from 0 to 1 V. (b) Drain voltage dependent transfer characteristic curves. The current on-off ratio is about 10⁵. (c) Linear plot of the transfer characteristics. The extracted pinch-off voltage V_P is −0.18 V. (d) The SS extracted at three V_DS of 1, 2, and 3 V. The minimum value of 113 mV dec⁻¹ was extracted. (e) The g_m as a function of gate voltage of the JFET at the V_DS of 1, 2, and 3 V. (f) Multiple comparisons of key parameters of the uniformly doped and undoped MoS₂/MoTe₂ JFETs.