Low-Voltage Complementary Electronics from Ion-Gel-Gated Vertical Van der Waals Heterostructures

Area of Science:

• Materials Science
• Electrical Engineering
• Condensed Matter Physics

Background:

• Van der Waals (vdW) heterostructures offer unique electronic properties.
• Vertical field-effect transistors (VFETs) are promising for miniaturized electronics.
• Low-voltage operation is crucial for energy-efficient devices.

Purpose of the Study:

• To demonstrate low-voltage complementary circuits using vdW heterojunction VFETs.
• To characterize the performance of n-type and p-type vdW heterojunction VFETs.
• To assess the potential for high-performance, low-power electronic applications.

Main Methods:

• Fabrication of n-type and p-type vdW heterojunctions.
• Integration into complementary circuit configurations.
• Electrical characterization under low-voltage bias.

Main Results:

• Successful demonstration of complementary circuits with vdW heterojunction VFETs.
• Achieved high on-state current densities exceeding 3000 A cm⁻².
• Obtained high on/off current ratios greater than 10⁴ within a narrow voltage window (<3 V).

Conclusions:

• Low-voltage complementary circuits based on vdW heterojunction VFETs are feasible.
• These VFETs exhibit excellent performance metrics suitable for advanced electronics.
• The technology holds promise for developing next-generation energy-efficient electronic devices.