Enhancement of thermoelectric figure-of-merit by resonant states of aluminium doping in lead selenide

Enhancement of thermoelectric figure-of-merit by resonant states of aluminium doping in lead selenide

By adding aluminium (Al) into lead selenide (PbSe), we successfully prepared n-type PbSe thermoelectric materials with a figure-of-merit (ZT) of 1.3 at 850 K. Such a high ZT is achieved by a combination of high Seebeck coefficient caused by very possibly the resonant states in the conduction band cr...

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Bibliographic Details
Main Authors: Zhang, Qinyong (Author), Wang, Hui (Author), Liu, Weishu (Author), Wang, Hengzhi (Author), Yu, Bo (Author), Zhang, Qian (Author), Tian, Zhiting (Contributor), Lee, Sangyeop (Contributor), Esfarjani, Keivan (Contributor), Chen, Gang (Contributor), Ren, Zhifeng (Author), Ni, George Wei (Contributor)
Other Authors: Massachusetts Institute of Technology. Department of Mechanical Engineering (Contributor)
Format: Article
Language:English
Published: Royal Society of Chemistry, 2014-05-09T15:17:41Z.
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Summary:By adding aluminium (Al) into lead selenide (PbSe), we successfully prepared n-type PbSe thermoelectric materials with a figure-of-merit (ZT) of 1.3 at 850 K. Such a high ZT is achieved by a combination of high Seebeck coefficient caused by very possibly the resonant states in the conduction band created by Al dopant and low thermal conductivity from nanosized phonon scattering centers.
United States. Dept. of Energy. Office of Basic Energy Sciences (Solid-State Solar-Thermal Energy Conversion Center Award DE-SC0001299/DE-FG02-09ER46577)

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