Study on anisotropy of n-type Mg3Sb2-based thermoelectric materials

doi:10.1063/1.5000053

Title: Study on anisotropy of n-type Mg ₃Sb ₂-based thermoelectric materials

Abstract

The recent discovery of a high thermoelectric figure of merit (ZT) in an n-type Mg ₃Sb ₂-based Zintl phase triggered an intense research effort to pursue even higher ZT. Based on our previous report on Mg _3.1Nb _0.1Sb _1.5Bi _0.49Te _0.01, we report here that partial texturing in the (001) plane is achieved by double hot pressing, which is further confirmed by the rocking curves of the (002) plane. The textured samples of Mg _3.1Nb _0.1Sb _1.5Bi _0.49Te _0.01 show a much better average performance in the (00l) plane. Hall mobility is significantly improved to ~105 cm ² V ^-1 s ^-1 at room temperature in the (00l) plane due to texturing, resulting in higher electrical conductivity, a higher power factor of ~18 μW cm ^-1K ^-2 at room temperature, and also higher average ZT. This work shows that texturing is good for higher thermoelectric performance, suggesting that single crystals of n-type Mg ₃Sb ₂-based Zintl compounds are worth pursuing.

Authors:

Song, Shaowei ^[1]; Mao, Jun ^[2]; Shuai, Jing ^[2]; Zhu, Hangtian ^[2];

^[2]; Saparamadu, Udara ^[2]; Tang, Zhongjia ^[2]; Wang, Bo ^[3]; Ren, Zhifeng ^[2]

Xihua Univ., Chengdu (China); Univ. of Houston, Houston, TX (United States)
Univ. of Houston, Houston, TX (United States)
Xihua Univ., Chengdu (China)

Publication Date:: 2018-02-27

Research Org.:: Univ. of Houston, TX (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1540123

Grant/Contract Number:: SC0010831

Resource Type:: Accepted Manuscript

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 112; Journal Issue: 9; Journal ID: ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Physics

Citation Formats


                    Song, Shaowei, Mao, Jun, Shuai, Jing, Zhu, Hangtian, Ren, Zhensong, Saparamadu, Udara, Tang, Zhongjia, Wang, Bo, and Ren, Zhifeng. Study on anisotropy of n-type Mg3Sb2-based thermoelectric materials.  United States: N. p., 2018. 
        Web.  doi:10.1063/1.5000053.

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                    Song, Shaowei, Mao, Jun, Shuai, Jing, Zhu, Hangtian, Ren, Zhensong, Saparamadu, Udara, Tang, Zhongjia, Wang, Bo, & Ren, Zhifeng. Study on anisotropy of n-type Mg3Sb2-based thermoelectric materials.  United States.  doi:10.1063/1.5000053.

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                    Song, Shaowei, Mao, Jun, Shuai, Jing, Zhu, Hangtian, Ren, Zhensong, Saparamadu, Udara, Tang, Zhongjia, Wang, Bo, and Ren, Zhifeng. Tue .  
        "Study on anisotropy of n-type Mg3Sb2-based thermoelectric materials".  United States.  doi:10.1063/1.5000053.  https://www.osti.gov/servlets/purl/1540123.

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@article{osti_1540123,

  title        = {Study on anisotropy of n-type Mg3Sb2-based thermoelectric materials},

  author       = {Song, Shaowei and Mao, Jun and Shuai, Jing and Zhu, Hangtian and Ren, Zhensong and Saparamadu, Udara and Tang, Zhongjia and Wang, Bo and Ren, Zhifeng},

  abstractNote = {The recent discovery of a high thermoelectric figure of merit (ZT) in an n-type Mg3Sb2-based Zintl phase triggered an intense research effort to pursue even higher ZT. Based on our previous report on Mg3.1Nb0.1Sb1.5Bi0.49Te0.01, we report here that partial texturing in the (001) plane is achieved by double hot pressing, which is further confirmed by the rocking curves of the (002) plane. The textured samples of Mg3.1Nb0.1Sb1.5Bi0.49Te0.01 show a much better average performance in the (00l) plane. Hall mobility is significantly improved to ~105 cm2 V-1 s-1 at room temperature in the (00l) plane due to texturing, resulting in higher electrical conductivity, a higher power factor of ~18 μW cm-1K-2 at room temperature, and also higher average ZT. This work shows that texturing is good for higher thermoelectric performance, suggesting that single crystals of n-type Mg3Sb2-based Zintl compounds are worth pursuing.},

  doi          = {10.1063/1.5000053},

  journal      = {Applied Physics Letters},

  number       = 9,

  volume       = 112,

  place        = {United States},

  year         = {2018},

  month        = {2}

}

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DOI: 10.1063/1.5000053

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Title: Study on anisotropy of n-type Mg 3Sb 2-based thermoelectric materials

Abstract

Citation Formats

Defect Chemistry for Thermoelectric Materials journal, November 2016

Nanoporous PbSe-SiO 2 Thermoelectric Composites journal, August 2017

Ultralow Thermal Conductivity in Disordered, Layered WSe2 Crystals journal, January 2007

Anomalous electrical conductivity of n-type Te-doped Mg3.2Sb1.5Bi0.5 journal, December 2017

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Enhanced stability and thermoelectric figure-of-merit in copper selenide by lithium doping journal, June 2017

Tuning the carrier concentration using Zintl chemistry in Mg 3 Sb 2 , and its implications for thermoelectric figure-of-merit journal, January 2016

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Title: Study on anisotropy of n-type Mg ₃Sb ₂-based thermoelectric materials

Defect Chemistry for Thermoelectric Materials
journal, November 2016

Nanoporous PbSe-SiO ₂ Thermoelectric Composites
journal, August 2017

Ultralow Thermal Conductivity in Disordered, Layered WSe₂ Crystals
journal, January 2007

Anomalous electrical conductivity of n-type Te-doped Mg3.2Sb1.5Bi0.5
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Manipulation of ionized impurity scattering for achieving high thermoelectric performance in n-type Mg ₃ Sb ₂ -based materials
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