Journal of Electronic Materials

, Volume 47, Issue 2, pp 998–1002 | Cite as

The Effect of SbI3 Doping on the Structure and Electrical Properties of n-Type Bi1.8Sb0.2Te2.85Se0.15 Alloy Prepared by the Free Growth Method

  • Xiaoyu Wang
  • Yuan Yu
  • Bin Zhu
  • Na Gao
  • Zhongyue Huang
  • Bo Xiang
  • Fangqiu ZuEmail author


Thermoelectric technology is regarded as one of the most promising direct power generation techniques via thermoelectric materials. However, the batch production and scale-up application are hindered because of the high-cost and poor performance. In this work, we adopt the free growth method to synthesize a series of the bulk materials of SbI3-doped Bi1.8Sb0.2Te2.85Se0.15 alloys. The structural and component investigations as well as the electrical properties characterization are carried out. The results show that SbI3 promotes the formation of Te-rich regions in the matrix. In addition, the synergistically optimized electrical conductivity and Seebeck coefficient are attained by controlling the SbI3 doping concentration. Thus, the sample with 0.30 wt.% SbI3 displays a highly increased power factor of ∼ 13.57 μW cm−1 K−2, which is nearly 21 times higher than that of the undoped one. Moreover, the free growth method is reproducible, convenient and economical. Therefore, it has great potential as a promising technology for the batch synthesis.


The free growth method Bi1.8Sb0.2Te2.85Se0.15 alloy SbI3 doping electrical transport property 


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Copyright information

© The Minerals, Metals & Materials Society 2017

Authors and Affiliations

  • Xiaoyu Wang
    • 1
  • Yuan Yu
    • 1
    • 2
  • Bin Zhu
    • 1
  • Na Gao
    • 1
  • Zhongyue Huang
    • 1
  • Bo Xiang
    • 3
  • Fangqiu Zu
    • 1
    Email author
  1. 1.Liquid/Solid Metal Processing Institute, School of Materials Science and EngineeringHefei University of TechnologyHefeiChina
  2. 2.I. Physikalisches Institute (IA)RWTH AachenAachenGermany
  3. 3.Key Laboratory of Advanced Functional Materials and Devices of Anhui ProvinceHefeiChina

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