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

In this study, 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 con...

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Published inEnergy & environmental science Vol. 5; no. 1
Main Authors Zhang, Qinyong, Wang, Hui, Liu, Weishu, Wang, Hengzhi, Yu, Bo, Zhang, Qian, Tian, Zhiting, Ni, George, Lee, Sangyeop, Esfarjani, Keivan, Chen, Gang, Ren, Zhifeng
Format Journal Article
LanguageEnglish
Published United States Royal Society of Chemistry 11.11.2011
Subjects
charge transport
defects
materials and chemistry by design
MATERIALS SCIENCE
mechanical behavior
optics
phonons
solar (photovoltaic)
solar (thermal)
solid state lighting
spin dynamics
synthesis (novel materials)
synthesis (scalable processing)
synthesis (self-assembly)
thermal conductivity
thermoelectric
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Summary:In this study, 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.
Bibliography:SC0001299; FG02-09ER46577; FG02-08ER46516
USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:1754-5692
1754-5706