Two-dimensional (2D) materials hold great promise for future complementary metal-oxide semiconductor (CMOS) technology. However, the lack of effective methods to tune the Schottky barrier poses a challenge in constructing high-performance complementary circuits from the same material. Here, we reveal that the polarity of pristine MoTe 2 field-effect transistors (FETs) with minimized air exposure is n-type, irrespective of the metal contact type. The fabricated n-FETs with palladium contact can reach electron currents up to 275 μA/μm at V DS = 2 V. For p-FETs, we introduce a novel nitric oxide doping strategy, allowing a controlled transition of MoTe 2 FETs from n-type to unipolar p-type. By doping only in the contact region, we demonstrate hole currents up to 170 μA/μm at V DS = -2 V with preserved I on / I off ratios of 10 5 . Finally, we present a complementary inverter circuit comprising the high-performance n- and p-type FETs based on MoTe 2 , promoting the application of 2D materials in future electronic systems.