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Ultrahigh Thermoelectric Performance in Mosaic Crystals
Author(s) -
He Ying,
Lu Ping,
Shi Xun,
Xu Fangfang,
Zhang Tiansong,
Snyder Gerald Jeffrey,
Uher Ctirad,
Chen Lidong
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201501030
Subject(s) - mosaicity , materials science , nanomaterials , figure of merit , nanotechnology , nanoscopic scale , thermoelectric effect , optoelectronics , physics , epitaxy , layer (electronics) , thermodynamics
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.