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Unveiling advanced thermoelectric features in indium-doped Bi2Te3 bulk materials.

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Title: Unveiling advanced thermoelectric features in indium-doped Bi2Te3 bulk materials.
Authors: Adam, A. M.1,2 (AUTHOR) a.adam@science.sohag.edu.eg, Abd El-Lateef, Hany M.3 (AUTHOR) hmahmed@kfu.edu.sa, Easa, Ammar S.4,5 (AUTHOR), Saadallah, H. A. A.1 (AUTHOR), El-Khouly, A.6 (AUTHOR)
Source: European Physical Journal B: Condensed Matter. May2026, Vol. 99 Issue 5, p1-9. 9p.
Subjects: Bismuth telluride, Indium alloys, Solid state chemistry, Thermoelectric materials, Thermal conductivity, Thermoelectric effects, Seebeck coefficient, Thermoelectric power
Abstract: The influence of indium doping on the structure, morphology, and thermoelectric properties of bulk Bi2Te3 is investigated in the current work. Bi2Te3 and Bi2−xInxTe3 crystalline bulk samples have been fabricated using a simple mono-temperature melting method. The thermoelectric properties were evaluated within the temperature range of 300–700 K. The Seebeck coefficients (S) of the synthesized alloys proved the domination of n-type conduction due to consistently negative S values. The largest Seebeck coefficient was recorded at 142.4 µV/K, which was observed at 700 K for the pristine Bi2Te3 sample. The highest power factor was found at PF = 3.62 mW m−1 K−2, obtained for Bi2Te3 at room temperature. Thermal conductivity was measured and studied against temperature elevation. It was found that the thermal conductivity of the In-doped Bi1.98In0.02Te3 alloys is significantly reduced compared with that of the pure Bi2Te3 material. Such a reduction was attributed to the fact that substituting In for Bi atoms causes alloying scattering and consequently results in phonon scattering, which hence reduces the thermal conductivity. The thermoelectric figure of merit (zT) was calculated from the measured Seebeck coefficient and electrical and thermal conductivities. The maximum zT was achieved at 0.73 observed for the Bi1.94In0.06Te3 sample at 700 K. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal B: Condensed Matter is the property of Springer Nature 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: 194640304
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Unveiling advanced thermoelectric features in indium-doped Bi<subscript>2</subscript>Te<subscript>3</subscript> bulk materials.
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+B%3A+Condensed+Matter%22">European Physical Journal B: Condensed Matter</searchLink>. May2026, Vol. 99 Issue 5, p1-9. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Bismuth+telluride%22">Bismuth telluride</searchLink><br /><searchLink fieldCode="DE" term="%22Indium+alloys%22">Indium alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+state+chemistry%22">Solid state chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+materials%22">Thermoelectric materials</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+effects%22">Thermoelectric effects</searchLink><br /><searchLink fieldCode="DE" term="%22Seebeck+coefficient%22">Seebeck coefficient</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+power%22">Thermoelectric power</searchLink>
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  Data: The influence of indium doping on the structure, morphology, and thermoelectric properties of bulk Bi2Te3 is investigated in the current work. Bi2Te3 and Bi2−xInxTe3 crystalline bulk samples have been fabricated using a simple mono-temperature melting method. The thermoelectric properties were evaluated within the temperature range of 300–700 K. The Seebeck coefficients (S) of the synthesized alloys proved the domination of n-type conduction due to consistently negative S values. The largest Seebeck coefficient was recorded at 142.4 µV/K, which was observed at 700 K for the pristine Bi2Te3 sample. The highest power factor was found at PF = 3.62 mW m−1 K−2, obtained for Bi2Te3 at room temperature. Thermal conductivity was measured and studied against temperature elevation. It was found that the thermal conductivity of the In-doped Bi1.98In0.02Te3 alloys is significantly reduced compared with that of the pure Bi2Te3 material. Such a reduction was attributed to the fact that substituting In for Bi atoms causes alloying scattering and consequently results in phonon scattering, which hence reduces the thermal conductivity. The thermoelectric figure of merit (zT) was calculated from the measured Seebeck coefficient and electrical and thermal conductivities. The maximum zT was achieved at 0.73 observed for the Bi1.94In0.06Te3 sample at 700 K. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of European Physical Journal B: Condensed Matter is the property of Springer Nature 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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RecordInfo BibRecord:
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        Value: 10.1140/epjb/s10051-026-01167-6
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      – Code: eng
        Text: English
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        PageCount: 9
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    Subjects:
      – SubjectFull: Bismuth telluride
        Type: general
      – SubjectFull: Indium alloys
        Type: general
      – SubjectFull: Solid state chemistry
        Type: general
      – SubjectFull: Thermoelectric materials
        Type: general
      – SubjectFull: Thermal conductivity
        Type: general
      – SubjectFull: Thermoelectric effects
        Type: general
      – SubjectFull: Seebeck coefficient
        Type: general
      – SubjectFull: Thermoelectric power
        Type: general
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      – TitleFull: Unveiling advanced thermoelectric features in indium-doped Bi2Te3 bulk materials.
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            NameFull: Adam, A. M.
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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