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Open AccessArticle

Fe-Doping Effect on Thermoelectric Properties of p-Type Bi0.48Sb1.52Te3

1
Department of Energy Science, Sungkyunkwan University, Suwon 440-746, Korea
2
Department of Nano Applied Engineering, Kangwon National University, Chuncheon 200-701, Korea
3
School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education, Cheonan 330-708, Korea
4
Icheon Branch, Korea Institute of Ceramic Engineering and Technology, Icheon 467-843, Korea
5
Department of Electrical Engineering, Kwangwoon University, Seoul 139-701, Korea
6
Electrochemistry Department, Korea Institute of Materials Science, Changwon 641-010, Korea
7
Materials R&D Center, Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 443-370, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Kunihito Koumoto
Materials 2015, 8(3), 959-965; https://doi.org/10.3390/ma8030959
Received: 9 January 2015 / Revised: 17 February 2015 / Accepted: 26 February 2015 / Published: 5 March 2015
(This article belongs to the Special Issue Low-Dimensional Anisotropic Thermoelectrics)
The substitutional doping approach has been shown to be an effective strategy to improve ZT of Bi2Te3-based thermoelectric raw materials. We herein report the Fe-doping effects on electronic and thermal transport properties of polycrystalline bulks of p-type Bi0.48Sb1.52Te3. After a small amount of Fe-doping on Bi/Sb-sites, the power factor could be enhanced due to the optimization of carrier concentration. Additionally, lattice thermal conductivity was reduced by the intensified point-defect phonon scattering originating from the mass difference between the host atoms (Bi/Sb) and dopants (Fe). An enhanced ZT of 1.09 at 300 K was obtained in 1.0 at% Fe-doped Bi0.48Sb1.52Te3 by these synergetic effects. View Full-Text
Keywords: doping; Bi2Te3; thermoelectric; raw material; lattice thermal conductivity doping; Bi2Te3; thermoelectric; raw material; lattice thermal conductivity
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MDPI and ACS Style

Mun, H.; Lee, K.H.; Kim, S.J.; Kim, J.-Y.; Lee, J.H.; Lim, J.-H.; Park, H.J.; Roh, J.W.; Kim, S.W. Fe-Doping Effect on Thermoelectric Properties of p-Type Bi0.48Sb1.52Te3. Materials 2015, 8, 959-965.

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