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Synthesis, crystal structure, and transport properties of Cu2.2Zn0.8SnSe4−xTex (0.1 ≤ x ≤ 0.4).

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Title: Synthesis, crystal structure, and transport properties of Cu2.2Zn0.8SnSe4−xTex (0.1 ≤ x ≤ 0.4).
Authors: Dong, Yongkwan1, Eckert, Brian1, Wang, Hsin2, Zeng, Xiaoyu3, Tritt, Terry M.3, Nolas, George S.1
Source: Dalton Transactions: An International Journal of Inorganic Chemistry. 5/21/2015, Vol. 44 Issue 19, p9014-9019. 6p.
Subjects: Copper compounds synthesis, Stannite, Chalcogenides synthesis, Crystal structure, Rietveld refinement, Tellurium compounds, High temperature chemistry, Thermal conductivity
Abstract: Quaternary chalcogenides, particular compounds with the stannite structure-type, are of interest for thermoelectrics applications however tellurium-containing compositions have not been extensively investigated. We report on the synthesis and high temperature thermoelectric properties of p-type stannites Cu2.2Zn0.8SnSe4−xTex (x = 0.1, 0.2, 0.3, and 0.4). The compositions for each specimen were confirmed with a combination of Rietveld refinement and elemental analysis. Hall measurements indicate that holes are the dominant charge carriers in these materials. The electrical resistivity shows little temperature dependence up to 500 K and then increases with increasing temperature. The thermal conductivity decreases with increasing temperature with no indication of increase at higher temperatures suggesting a minimal bipolar diffusion effect in the thermal conductivity although these materials possess relatively small band-gaps as compared to that of other stannite compositions. A maximum ZT value of 0.56 was obtained at 700 K for Cu2.2Zn0.8SnSe3.7Te0.3 due to a relatively high Seebeck coefficient and low thermal conductivity. [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 102574107
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  Data: Synthesis, crystal structure, and transport properties of Cu<subscript>2.2</subscript>Zn<subscript>0.8</subscript>SnSe<subscript>4−x</subscript>Te<subscript>x</subscript> (0.1 ≤ x ≤ 0.4).
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  Data: <searchLink fieldCode="AR" term="%22Dong%2C+Yongkwan%22">Dong, Yongkwan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Eckert%2C+Brian%22">Eckert, Brian</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Hsin%22">Wang, Hsin</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Xiaoyu%22">Zeng, Xiaoyu</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Tritt%2C+Terry+M%2E%22">Tritt, Terry M.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Nolas%2C+George+S%2E%22">Nolas, George S.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Dalton+Transactions%3A+An+International+Journal+of+Inorganic+Chemistry%22">Dalton Transactions: An International Journal of Inorganic Chemistry</searchLink>. 5/21/2015, Vol. 44 Issue 19, p9014-9019. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Copper+compounds+synthesis%22">Copper compounds synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Stannite%22">Stannite</searchLink><br /><searchLink fieldCode="DE" term="%22Chalcogenides+synthesis%22">Chalcogenides synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+structure%22">Crystal structure</searchLink><br /><searchLink fieldCode="DE" term="%22Rietveld+refinement%22">Rietveld refinement</searchLink><br /><searchLink fieldCode="DE" term="%22Tellurium+compounds%22">Tellurium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperature+chemistry%22">High temperature chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Quaternary chalcogenides, particular compounds with the stannite structure-type, are of interest for thermoelectrics applications however tellurium-containing compositions have not been extensively investigated. We report on the synthesis and high temperature thermoelectric properties of p-type stannites Cu2.2Zn0.8SnSe4−xTex (x = 0.1, 0.2, 0.3, and 0.4). The compositions for each specimen were confirmed with a combination of Rietveld refinement and elemental analysis. Hall measurements indicate that holes are the dominant charge carriers in these materials. The electrical resistivity shows little temperature dependence up to 500 K and then increases with increasing temperature. The thermal conductivity decreases with increasing temperature with no indication of increase at higher temperatures suggesting a minimal bipolar diffusion effect in the thermal conductivity although these materials possess relatively small band-gaps as compared to that of other stannite compositions. A maximum ZT value of 0.56 was obtained at 700 K for Cu2.2Zn0.8SnSe3.7Te0.3 due to a relatively high Seebeck coefficient and low thermal conductivity. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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    Identifiers:
      – Type: doi
        Value: 10.1039/c5dt00910c
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      – Code: eng
        Text: English
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        PageCount: 6
        StartPage: 9014
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      – SubjectFull: Copper compounds synthesis
        Type: general
      – SubjectFull: Stannite
        Type: general
      – SubjectFull: Chalcogenides synthesis
        Type: general
      – SubjectFull: Crystal structure
        Type: general
      – SubjectFull: Rietveld refinement
        Type: general
      – SubjectFull: Tellurium compounds
        Type: general
      – SubjectFull: High temperature chemistry
        Type: general
      – SubjectFull: Thermal conductivity
        Type: general
    Titles:
      – TitleFull: Synthesis, crystal structure, and transport properties of Cu2.2Zn0.8SnSe4−xTex (0.1 ≤ x ≤ 0.4).
        Type: main
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            NameFull: Dong, Yongkwan
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            NameFull: Eckert, Brian
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            NameFull: Wang, Hsin
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            NameFull: Zeng, Xiaoyu
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            NameFull: Tritt, Terry M.
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            – D: 21
              M: 05
              Text: 5/21/2015
              Type: published
              Y: 2015
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              Value: 44
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              Value: 19
          Titles:
            – TitleFull: Dalton Transactions: An International Journal of Inorganic Chemistry
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