TY - JOUR
T1 - Promising zintl-phase thermoelectric compound SrAgSb
AU - Zhang, Weiming
AU - Chen, Chen
AU - Yao, Honghao
AU - Xue, Wenhua
AU - Li, Shan
AU - Bai, Fengxian
AU - Huang, Yifang
AU - Li, Xiaofang
AU - Lin, Xi
AU - Cao, Feng
AU - Sui, Jiehe
AU - Wang, Shufang
AU - Yu, Bo
AU - Wang, Yumei
AU - Liu, Xingjun
AU - Zhang, Qian
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/8/25
Y1 - 2020/8/25
N2 - Zintl-phase thermoelectric materials have garnered a lot of attention because of their intrinsic electron-crystal and phonon-glass structures. In this work, a series of ZrBeSi-type Zintl-phase compounds (SrAgSb, EuAgSb, and EuCuSb) were prepared, and their band structures and thermoelectric properties were investigated. The peak ZTs of SrAgSb, EuAgSb, and EuCuSb reach ∼0.5, ∼0.35, and ∼0.3 at 773 K. The carrier concentration of SrxAgSb was subsequently optimized by Sr self-doping. The increased Sr content suppresses the intrinsic hole concentration and leads to decreased total thermal conductivity. Together with the comparable power factor, a peak ZT of ∼0.6 was achieved at 773 K for Sr1.01AgSb and Sr1.02AgSb. The discovery of these ZrBeSi-type Zintl-phase thermoelectric materials provides a new family for exploring higher ZT.
AB - Zintl-phase thermoelectric materials have garnered a lot of attention because of their intrinsic electron-crystal and phonon-glass structures. In this work, a series of ZrBeSi-type Zintl-phase compounds (SrAgSb, EuAgSb, and EuCuSb) were prepared, and their band structures and thermoelectric properties were investigated. The peak ZTs of SrAgSb, EuAgSb, and EuCuSb reach ∼0.5, ∼0.35, and ∼0.3 at 773 K. The carrier concentration of SrxAgSb was subsequently optimized by Sr self-doping. The increased Sr content suppresses the intrinsic hole concentration and leads to decreased total thermal conductivity. Together with the comparable power factor, a peak ZT of ∼0.6 was achieved at 773 K for Sr1.01AgSb and Sr1.02AgSb. The discovery of these ZrBeSi-type Zintl-phase thermoelectric materials provides a new family for exploring higher ZT.
UR - https://www.scopus.com/pages/publications/85092053800
U2 - 10.1021/acs.chemmater.0c02317
DO - 10.1021/acs.chemmater.0c02317
M3 - 文章
AN - SCOPUS:85092053800
SN - 0897-4756
VL - 32
SP - 6983
EP - 6989
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 16
ER -