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Ultrahigh Thermoelectric Performance in Mosaic Crystals.

Ying He1,2,3, Ping Lu1,3, Xun Shi1,2

  • 1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.

Advanced Materials (Deerfield Beach, Fla.)
|May 13, 2015
PubMed
Summary
This summary is machine-generated.

Researchers achieved a figure of merit (zT) of 2.1 at 1000 K in bulk nanomaterials by utilizing nanoscale mosaicity. This new mechanism surpasses conventional approaches for enhancing thermoelectric performance.

Keywords:
electrical conductivitymosaic crystalsthermal conductivitythermoelectric materialsthermopower

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Enhancing the dimensionless figure of merit (zT) is crucial for efficient thermoelectric materials.
  • Current strategies for zT enhancement above 2 primarily involve bulk nanomaterials or single crystals.

Purpose of the Study:

  • To introduce and investigate a novel physical mechanism of nanoscale mosaicity.
  • To explore a new approach for improving thermoelectric performance beyond existing methods.

Main Methods:

  • Investigated a new physical mechanism termed nanoscale mosaicity.
  • Fabricated and characterized bulk nanomaterials exhibiting this mechanism.

Main Results:

  • Achieved a dimensionless figure of merit (zT) of 2.1 at 1000 K in bulk nanomaterials.
  • Demonstrated that nanoscale mosaicity offers a new pathway for thermoelectric enhancement.

Conclusions:

  • Nanoscale mosaicity represents a significant advancement in thermoelectric material design.
  • This mechanism provides a route to high thermoelectric performance in bulk nanomaterials.