Journal of Alloys and Compounds2022，Vol.9128.DOI:10.1016/j.jallcom.2022.165208

Thermoelectric properties of Sm-doped BiCuSeO oxyselenides fabricated by two-step reactive sintering

Novitskii, Andrei Serhiienko, Illia Novikov, Sergey Kuskov, Kirill Pankratova, Daria Sviridova, Tatyana Voronin, Andrei Bogach, Aleksei Skryleva, Elena Parkhomenko, Yuriy Burkov, Alexander Mori, Takao Khovaylo, Vladimir
Journal of Alloys and Compounds2022，Vol.9128.DOI:10.1016/j.jallcom.2022.165208
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  • NSTL
  • Elsevier

Thermoelectric properties of Sm-doped BiCuSeO oxyselenides fabricated by two-step reactive sintering

Novitskii, Andrei 1Serhiienko, Illia 1Novikov, Sergey 2Kuskov, Kirill 1Pankratova, Daria 1Sviridova, Tatyana 1Voronin, Andrei 1Bogach, Aleksei 3Skryleva, Elena 1Parkhomenko, Yuriy 1Burkov, Alexander 2Mori, Takao 4Khovaylo, Vladimir1
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作者信息

  • 1. Natl Univ Sci & Technol MISIS
  • 2. Ioffe Inst
  • 3. Russian Acad Sci
  • 4. Natl Inst Mat Sci NIMS
  • 折叠

Abstract

Among layered oxygen-containing compounds, BiCuSeO is one of the most promising candidates for thermoelectric applications due to its intrinsically low thermal conductivity and good thermal stability. However, the rather poor electrical conductivity of pristine BiCuSeO hinders its potential. Further enhancement of the thermoelectric performance by single doping at Bi site is limited mainly due to dramatic decrease of carrier mobility. Thus, new strategies, such as dual doping or doping with variable-valence elements seem to be promising. Along with that, the development of a fast and scalable synthesis route is essential for the industrial-scale fabrication of thermoelectric materials. Hence, in this paper, Bi1-xSmxCuSeO samples (0 <_ x <_ 0.08) have been synthesized with a simple and scalable reactive sintering process. For comparison, Bi1-xSmxCuSeO oxyselenides were also obtained by the conventional solid-state route. Our results highlight that, Sm for Bi substitution increases the electrical conductivity by 1.5-2 times and decreases the Seebeck coefficient by ~1.4 times at 873 K for both series. Overall, considering the increase of lattice thermal conductivity upon doping and not optimized power factor, the figure of merit zT is reducing upon doping.(C)& nbsp;2022 Elsevier B.V. All rights reserved.

Key words

Thermoelectric materials/Spark plasma sintering/Thermal conductivity/Electrical properties/BiCuSeO oxyselenides/TRANSPORT-PROPERTIES/COPPER OXYSELENIDES/X-RAY/PERFORMANCE/GD/SEMICONDUCTOR/ENHANCEMENT/ZRCUSIAS/SYSTEM/PURE

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出版年

2022
Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
被引量6
参考文献量81
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