Ultrahigh Thermoelectric Performance in Mosaic Crystals.

He, Ying; Lu, Ping; Shi, Xun; Xu, Fangfang; Zhang, Tiansong; Snyder, Gerald Jeffrey; Uher, Ctirad; Chen, Lidong · Adv Mater · 2015

basic_science · Level V

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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.