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Enhanced thermoelectric performance of Bi2Se3-Bi2Te3 alloys prepared by mechanical alloying and hot pressing.

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Title: Enhanced thermoelectric performance of Bi2Se3-Bi2Te3 alloys prepared by mechanical alloying and hot pressing.
Authors: Deshmukh, Poonam1,2 (AUTHOR) poonamkhade06@gmail.com, Modi, Anchit3 (AUTHOR) anchitmodi87@gmail.com, Bagwaiya, Toshi2 (AUTHOR), Singh, Virendra Pratap4 (AUTHOR), Bhattacharya, Shovit5 (AUTHOR), Singh, Ajay5 (AUTHOR), Shelke, Vilas2 (AUTHOR)
Source: Materials Letters. Jan2026, Vol. 403, pN.PAG-N.PAG. 1p.
Subjects: Thermoelectric materials, Alloys, Mechanical alloying, Electric conductivity, Hot pressing, Electric power factor, Bismuth selenide, Thermoelectricity
Abstract: • Bi 2 Te 3 -Bi 2 Se 3 composites were made by mechanical alloying and hot-press sintering. • Alloying and reduced crystallite size enhance electrical conductivity significantly. • Improved power factor and ZT confirm enhanced thermoelectric properties in composites. In this study, 3D topological materials Bi 2 Te 3 , Bi 2 Se 3 , and their nominal alloys (1–x)Bi 2 Te 3 - (x)Bi 2 Se 3 (x = 0, 0.2, 0.3, 0.5, 1.0) were synthesized via mechanical alloying and hot-press sintering to investigate charge carrier transport. Rietveld refinement confirmed rhombohedral (R-3 m) symmetry in the pure phases, while Raman analysis revealed that acoustic phonon scattering significantly influences charge carrier transport at high temperatures. The alloys showed up to threefold higher conductivity, likely from alloying, defects, and interfaces, enhancing the power factor and thermoelectric performance. [ABSTRACT FROM AUTHOR]
Copyright of Materials Letters is the property of Elsevier B.V. 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: 188579125
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  Label: Title
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  Data: Enhanced thermoelectric performance of Bi2Se3-Bi2Te3 alloys prepared by mechanical alloying and hot pressing.
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  Data: <searchLink fieldCode="AR" term="%22Deshmukh%2C+Poonam%22">Deshmukh, Poonam</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> poonamkhade06@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Modi%2C+Anchit%22">Modi, Anchit</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> anchitmodi87@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Bagwaiya%2C+Toshi%22">Bagwaiya, Toshi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Singh%2C+Virendra+Pratap%22">Singh, Virendra Pratap</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bhattacharya%2C+Shovit%22">Bhattacharya, Shovit</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Singh%2C+Ajay%22">Singh, Ajay</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shelke%2C+Vilas%22">Shelke, Vilas</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+Letters%22">Materials Letters</searchLink>. Jan2026, Vol. 403, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Thermoelectric+materials%22">Thermoelectric materials</searchLink><br /><searchLink fieldCode="DE" term="%22Alloys%22">Alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+alloying%22">Mechanical alloying</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Hot+pressing%22">Hot pressing</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+power+factor%22">Electric power factor</searchLink><br /><searchLink fieldCode="DE" term="%22Bismuth+selenide%22">Bismuth selenide</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectricity%22">Thermoelectricity</searchLink>
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  Label: Abstract
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  Data: • Bi 2 Te 3 -Bi 2 Se 3 composites were made by mechanical alloying and hot-press sintering. • Alloying and reduced crystallite size enhance electrical conductivity significantly. • Improved power factor and ZT confirm enhanced thermoelectric properties in composites. In this study, 3D topological materials Bi 2 Te 3 , Bi 2 Se 3 , and their nominal alloys (1–x)Bi 2 Te 3 - (x)Bi 2 Se 3 (x = 0, 0.2, 0.3, 0.5, 1.0) were synthesized via mechanical alloying and hot-press sintering to investigate charge carrier transport. Rietveld refinement confirmed rhombohedral (R-3 m) symmetry in the pure phases, while Raman analysis revealed that acoustic phonon scattering significantly influences charge carrier transport at high temperatures. The alloys showed up to threefold higher conductivity, likely from alloying, defects, and interfaces, enhancing the power factor and thermoelectric performance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Letters is the property of Elsevier B.V. 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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      – Type: doi
        Value: 10.1016/j.matlet.2025.139486
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
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      – SubjectFull: Thermoelectric materials
        Type: general
      – SubjectFull: Alloys
        Type: general
      – SubjectFull: Mechanical alloying
        Type: general
      – SubjectFull: Electric conductivity
        Type: general
      – SubjectFull: Hot pressing
        Type: general
      – SubjectFull: Electric power factor
        Type: general
      – SubjectFull: Bismuth selenide
        Type: general
      – SubjectFull: Thermoelectricity
        Type: general
    Titles:
      – TitleFull: Enhanced thermoelectric performance of Bi2Se3-Bi2Te3 alloys prepared by mechanical alloying and hot pressing.
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            NameFull: Deshmukh, Poonam
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            NameFull: Modi, Anchit
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            NameFull: Bagwaiya, Toshi
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            – D: 15
              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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              Value: 403
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