W-Shaped Antiambipolar Transistors Based on h-BN/MoTe₂/BP Heterostructures

Area of Science:

• Materials Science and Engineering
• Nanotechnology
• Semiconductor Physics

Background:

• Conventional CMOS technology faces scaling and energy efficiency limitations.
• Multifunctional device architectures are crucial for next-generation electronics.
• Antiambipolar transistors (AATs) offer unique characteristics for advanced applications.

Purpose of the Study:

• To develop a high-performance W-shaped AAT.
• To demonstrate its potential for logic, analog, and optoelectronic functions.
• To overcome limitations of current semiconductor technologies.

Main Methods:

• Fabrication of a W-shaped AAT using an h-BN/MoTe₂/BP van der Waals heterostructure.
• Characterization of the device's electrical and optoelectronic properties.
• Implementation and testing of ternary inverters, frequency multipliers, and photodetectors.

Main Results:

• The W-shaped AAT exhibits four discrete conductance states and a symmetric Λ-region.
• Achieved a high on/off current ratio (>10⁵) and stable operation over 200 cycles.
• Demonstrated successful implementation of a ternary inverter, bias-free frequency doubling, and a gate-tunable photodetector with high performance metrics (responsivity, EQE, fast response).

Conclusions:

• W-shaped AATs based on van der Waals heterostructures are promising for multifunctional nanoelectronic systems.
• The device offers reconfigurability, energy efficiency, and high integration density.
• This platform paves the way for advanced logic, analog signal processing, and optoelectronic applications.