Defect mediated structural, optical, electrical and mechanical properties of mechano-synthesized PbTe nanostructure as a superior thermoelectric material: Correlation among electrical, mechanical and optical properties

Paul, Shrabani; Pradhan, S.K.

doi:10.1016/j.jallcom.2022.166833

Cited by 9 publications

(1 citation statement)

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“…The temperature-dependent carrier concentration was measured by the van der Pauw technique. The optical band gap was determined by a Nicolet IS50 FT-IR spectrophotometer . The uncertainties for the measured electrical conductivity, Seebeck coefficient, and thermal conductivity are 3%, 5%, and 6%, respectively.…”

Section: Methodsmentioning

confidence: 99%

Realizing Enhanced Thermoelectric Performance in Zintl-Phase SrCuSb by Reducing the Thermal Conductivity

Wei

Chen²,

Yao

et al. 2023

ACS Appl. Energy Mater.

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Zintl-phase compounds have been extensively studied in recent years due to their phonon-glass and electron-crystal structure. As a ZrBeSi-type Zintl-phase compound, SrCuSb exhibits both high electrical transport properties and thermal conductivity because of the fully occupied anionic framework. In this work, the thermoelectric properties of SrCuSb were refined by Sr self-doping. The increased Sr content not only suppressed the secondary phase SrCu 2 Sb 2 but also lowered the carrier contribution to the thermal conductivity. A zT value of ∼0.36 was achieved for Sr 1.05 CuSb at 700 K. To further decrease the thermal conductivity, Ba was introduced to the alloy at the Sr site. Benefiting from the point defect scattering, the lattice thermal conductivity was reduced to ∼0.7 W K −1 m −1 at 760 K for the Sr 0.75 Ba 0.3 CuSb sample. Finally, a peak zT of ∼0.5 was obtained for Sr 0.75 Ba 0.3 CuSb at 773 K.

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Section: Methodsmentioning

confidence: 99%