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나노 구조 물리 연구단
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Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3

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Title
Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3
Author(s)
Lee K.H.; Choi S.-M.; Kim S.I.; Roh J.W.; Yang D.J.; Shin W.H.; Park H.J.; Lee K.; Hwang S.; Lee J.H.; Mun H.; Sung Wng Kim
Publication Date
2015-03
Journal
CURRENT APPLIED PHYSICS, v.15, no.3, pp.190 - 193
Publisher
ELSEVIER SCIENCE BV
Abstract
We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).
URI
https://pr.ibs.re.kr/handle/8788114/739
ISSN
1567-1739
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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5_(2015)Doping effects on the TE properties of Cu-intercalated BTS(CAP).pdfDownload

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