A high-performance complementary inverter based on transition metal dichalcogenide field-effect transistors

Area of Science:

• Materials Science
• Nanotechnology
• Electronics

Background:

• Graphene, a 2D material, has limitations for logic circuits due to its zero band-gap.
• Transition metal dichalcogenides (TMDs) offer a sizable band-gap and high mobility, making them promising for electronic applications.

Purpose of the Study:

• To design and fabricate a complementary inverter using MoS2 and WSe2 transistors.
• To demonstrate the feasibility of a high-performance complementary metal-oxide-semiconductor (CMOS) inverter based on TMDs.

Main Methods:

• Fabrication of MoS2 n-type field-effect transistors (n-FET) and WSe2 p-type field-effect transistors (p-FET) on the same substrate.
• Integration of n-FET and p-FET into a complementary inverter configuration.
• Electrical characterization of the fabricated TMD complementary inverter.

Main Results:

• Successful demonstration of a TMD complementary inverter with a high gain of 13.7.
• Operation of both MoS2 n-FET and WSe2 p-FET on a single substrate.
• Measurement of the electrical performance, including gain and driving current, of the CMOS inverter.

Conclusions:

• The study successfully demonstrates a high-performance TMD complementary inverter, overcoming graphene's limitations.
• This work paves the way for advanced logic circuits utilizing the unique properties of 2D materials like MoS2 and WSe2.
• The developed TMD CMOS inverter shows potential for future nanoelectronic applications.