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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
Abstract:
Successful research strategies to enhance the dimensionless figure of merit zT above 2 rely on either bulk nanomaterials or on single crystals. A new physical mechanism of nanoscale mosaicity is shown that goes beyond the approaches in single crystals or conventional nanomaterials. A zT value of 2.1 at 1000 K in bulk nanomaterials is achieved.
Keywords:
electrical conductivitymosaic crystalsthermal conductivitythermoelectric materialsthermopower
