Abstract
Thermoelectric technology, harvesting electric power directly from heat, is a promising environmentally friendly means of energy savings and power generation. The thermoelectric efficiency is determined by the device dimensionless figure of merit ZTdev, and optimizing this efficiency requires maximizing ZT values over a broad temperature range. Here, we report a record high ZTdev ∼1.34, with ZT ranging from 0.7 to 2.0 at 300 to 773 kelvin, realized in hole-doped tin selenide (SnSe) crystals. The exceptional performance arises from the ultrahigh power factor, which comes from a high electrical conductivity and a strongly enhanced Seebeck coefficient enabled by the contribution of multiple electronic valence bands present in SnSe. SnSe is a robust thermoelectric candidate for energy conversion applications in the low and moderate temperature range.
| Original language | English |
|---|---|
| Pages (from-to) | 141-144 |
| Number of pages | 4 |
| Journal | Science |
| Volume | 351 |
| Issue number | 6269 |
| DOIs | |
| Publication status | Published - Jan 8 2016 |
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Ultrahigh power factor and thermoelectric performance in hole-doped single-crystal SnSe. / Zhao, Li Dong; Tan, Gangjian; Hao, Shiqiang; He, Jiaqing; Pei, Yanling; Chi, Hang; Wang, Heng; Gong, Shengkai; Xu, Huibin; Dravid, Vinayak P.; Uher, Ctirad; Snyder, G. Jeffrey; Wolverton, Chris; Kanatzidis, Mercouri G.
In: Science, Vol. 351, No. 6269, 08.01.2016, p. 141-144.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Ultrahigh power factor and thermoelectric performance in hole-doped single-crystal SnSe
AU - Zhao, Li Dong
AU - Tan, Gangjian
AU - Hao, Shiqiang
AU - He, Jiaqing
AU - Pei, Yanling
AU - Chi, Hang
AU - Wang, Heng
AU - Gong, Shengkai
AU - Xu, Huibin
AU - Dravid, Vinayak P.
AU - Uher, Ctirad
AU - Snyder, G. Jeffrey
AU - Wolverton, Chris
AU - Kanatzidis, Mercouri G
PY - 2016/1/8
Y1 - 2016/1/8
N2 - Thermoelectric technology, harvesting electric power directly from heat, is a promising environmentally friendly means of energy savings and power generation. The thermoelectric efficiency is determined by the device dimensionless figure of merit ZTdev, and optimizing this efficiency requires maximizing ZT values over a broad temperature range. Here, we report a record high ZTdev ∼1.34, with ZT ranging from 0.7 to 2.0 at 300 to 773 kelvin, realized in hole-doped tin selenide (SnSe) crystals. The exceptional performance arises from the ultrahigh power factor, which comes from a high electrical conductivity and a strongly enhanced Seebeck coefficient enabled by the contribution of multiple electronic valence bands present in SnSe. SnSe is a robust thermoelectric candidate for energy conversion applications in the low and moderate temperature range.
AB - Thermoelectric technology, harvesting electric power directly from heat, is a promising environmentally friendly means of energy savings and power generation. The thermoelectric efficiency is determined by the device dimensionless figure of merit ZTdev, and optimizing this efficiency requires maximizing ZT values over a broad temperature range. Here, we report a record high ZTdev ∼1.34, with ZT ranging from 0.7 to 2.0 at 300 to 773 kelvin, realized in hole-doped tin selenide (SnSe) crystals. The exceptional performance arises from the ultrahigh power factor, which comes from a high electrical conductivity and a strongly enhanced Seebeck coefficient enabled by the contribution of multiple electronic valence bands present in SnSe. SnSe is a robust thermoelectric candidate for energy conversion applications in the low and moderate temperature range.
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U2 - 10.1126/science.aad3749
DO - 10.1126/science.aad3749
M3 - Article
VL - 351
SP - 141
EP - 144
JO - Science
JF - Science
SN - 0036-8075
IS - 6269
ER -