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Thermoelectric efficiency in three-terminal graphene nano-junctions
Zahra Sartipi1, Amir Hayati2, Javad Vahedi1
1Department of Physics, Sari Branch, Islamic Azad University, Sari, Iran.
The Journal of Chemical Physics
|September 24, 2018
Summary
Adding a third terminal to a triangular graphene nano-junction enhances thermoelectric efficiency. This study investigates thermoelectric devices, showing improved efficiency at maximum output power with three electrodes compared to two.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Thermoelectric devices convert heat to electricity.
- Graphene nano-junctions are promising for efficient energy conversion.
- Optimizing thermoelectric efficiency is crucial for sustainable energy.
Purpose of the Study:
- To investigate the thermoelectric efficiency of a three-terminal triangular graphene nano-junction.
- To compare the efficiency of a three-terminal setup with a two-terminal setup.
- To analyze the efficiency at maximum output power using generalized figures of merit.
Main Methods:
- Utilized the Onsager formalism.
- Employed semi-empirical tight-binding calculations.
- Applied Green's function theory.
Main Results:
- The thermoelectric efficiency at maximum output power was investigated.
- A three-terminal graphene nano-junction demonstrated improved efficiency.
- Results were analyzed for specific temperature and chemical potential parameters.
Conclusions:
- A three-terminal configuration offers enhanced thermoelectric performance.
- Graphene nano-junctions with multiple terminals are advantageous for thermoelectric applications.
- Further research can explore optimizing multi-terminal thermoelectric devices.
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