Abstract:
In this work, we report the fabrication and characterization of an MoS
2 inverter by a dry transfer method, where the inverter consists of an MoS
2 transistor and an MoS
2 resistor connected in series with graphene flakes serving as electrodes. To improve the electrical performance of the MoS
2 transistor and invertor, we utilize thermal evaporation (Au) through a stencil mask to improve the contact quality between the graphene electrodes and metal electrodes on the substrate. Upon such enhancement, we find that the MoS
2 transistor exhibits an
ION/
IOFF > 10
5; the MoS
2 inverter shows a typical logic-conversion feature with voltage gain > 6. Our work demonstratesthat the dry transfer technique has great potential in the preparation and application of two-dimensional transistors, inverters and logic circuits.