Output performance of Bi-Sb-Te based thermoelectric-transistor model on parallel temperature gradient

Area of Science:

• Materials Science
• Solid State Physics
• Energy Conversion

Background:

• Thermoelectric (TE) materials offer potential for waste heat recovery.
• Transistors are fundamental semiconductor devices for amplification.
• Integrating these technologies can lead to self-powered electronic systems.

Purpose of the Study:

• To propose a novel transistor model integrating thermoelectric effects.
• To investigate synergistic operation between the Seebeck effect and bipolar junction transistor (BJT) principles.
• To demonstrate enhanced energy conversion for low-grade heat recovery.

Main Methods:

• A novel thermoelectricity-amplified transistor model was designed.
• The model utilizes a Bi-Sb-Te PNP heterojunction in a lateral configuration.
• Numerical simulations were performed under unidirectional thermal excitation and a 50 K thermal gradient.

Main Results:

• The proposed device synergistically integrates the Seebeck effect and BJT operation.
• A self-powered device was demonstrated, requiring no external bias.
• An optimized single device achieved 102.14 µW output power and 1.04% energy conversion efficiency.

Conclusions:

• The novel thermoelectricity-amplified transistor model shows significant potential for low-grade heat recovery.
• The device's self-powered nature and enhanced energy conversion capabilities are key advantages.
• This work paves the way for efficient thermoelectric energy harvesting solutions.