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Advances and Challenges in SnTe-Based Thermoelectrics.

Lijun Wang1,2, Raza Moshwan1, Ningyi Yuan2

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Summary

Tin telluride (SnTe) materials show promise for thermoelectric power generation. Recent advances focus on optimizing their electronic structure and thermal properties for improved efficiency in mid-to-high temperatures.

Keywords:
SnTedevicematerialstructurethermoelectric

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Energy Conversion

Background:

  • Tin telluride (SnTe)-based materials are recognized for their excellent thermoelectric performance in mid-to-high temperature applications.
  • Current limitations in SnTe efficiency stem from challenges in electronic structure, defect chemistry, and phonon transport.

Purpose of the Study:

  • To comprehensively review recent advancements (past five years) in SnTe thermoelectric materials and devices.
  • To highlight strategies for overcoming limitations and enhancing thermoelectric conversion efficiency.

Main Methods:

  • Summarizes strategies including defect regulation, carrier transport optimization, and phonon engineering.
  • Highlights advancements in fabrication, doping, alloying, composite design, and nanostructure development, particularly 2D SnTe materials (monolayers, bilayers, thin films).
  • Reviews SnTe-based thermoelectric device fabrication, performance optimization, stability, and flexible device development.

Main Results:

  • Significant progress has been made in enhancing electrical conductivity and reducing thermal conductivity through various material engineering approaches.
  • Novel nanostructures, especially 2D SnTe, present new avenues for performance improvements.
  • Developments in device fabrication and optimization show potential for practical applications.

Conclusions:

  • Despite progress, challenges persist in developing n-type SnTe, optimizing interfaces, ensuring long-term stability, and maximizing conversion efficiency.
  • This review provides insights for future research to improve SnTe thermoelectric properties and device commercialization.