Thermoelectric performance of nanostructured PbSnTeSe high entropy thermoelectric alloy synthesized via spark plasma sintering

Raphel, Arun; Singh, Appu Kumar; Vivekanandhan, P.; Kumaran, S.

doi:10.1016/j.physb.2021.413319

Cited by 18 publications

(16 citation statements)

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“…The fact remains that, so far, most of the research driven on the thermoelectric properties of high-entropy alloys are mainly experimental studies, theoretical studies on TE performance of high-entropy alloys being more seldom. Recently, PbSnTeSe has been experimentally investigated by Fan et al [61] and Raphel et al [62,63], who report appreciably similar results for the thermoelectric performance of the material (see below). The modelling of HEAs transport properties constitute a challenge, and both the simulation methods and their derived predictions have to be confronted to experimental data to assess their validity.…”

Section: Introductionmentioning

confidence: 75%

“…As mentioned in the introduction section, Fan et al [61] and Raphel et al [62,63] have reported experimental investigations on the thermoelectric properties of PbSnTeSe. The transport coefficients reported by these groups are presented in Table 3.…”

Section: Comparison With Available Data On Pbsntese and Other Heamentioning

confidence: 99%

“…In real compounds, electrons are scattered by impurities, defects, and grains boundaries, which are not accounted for in our model. [61,62]). The data from Fan et al [61] are at 700 K and for n = 6 × 10 19 e/cm −3 , and those from Raphel et al [62] are at 625 K.…”

Section: Comparison With Available Data On Pbsntese and Other Heamentioning

confidence: 99%

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Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

2022

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Thermoelectric materials have attracted extensive attention because they can directly convert waste heat into electric energy. As a brand-new method of alloying, high-entropy alloys (HEAs) have attracted much attention in the fields of materials science and engineering. Recent researches have found that HEAs could be potentially good thermoelectric (TE) materials. In this study, special quasi-random structures (SQS) of PbSnTeSe high-entropy alloys consisting of 64 atoms have been generated. The thermoelectric transport properties of the highest-entropy PbSnTeSe-optimized structure were investigated by combining calculations from first-principles density-functional theory and on-the-fly machine learning with the semiclassical Boltzmann transport theory and Green–Kubo theory. The results demonstrate that PbSnTeSe HEA has a very low lattice thermal conductivity. The electrical conductivity, thermal electronic conductivity and Seebeck coefficient have been evaluated for both n-type and p-type doping. N-type PbSnTeSe exhibits better power factor (PF = S2σ) than p-type PbSnTeSe because of larger electrical conductivity for n-type doping. Despite high electrical thermal conductivities, the calculated ZT are satisfactory. The maximum ZT (about 1.1) is found at 500 K for n-type doping. These results confirm that PbSnTeSe HEA is a promising thermoelectric material.

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Section: Introductionmentioning

confidence: 75%

Section: Comparison With Available Data On Pbsntese and Other Heamentioning

confidence: 99%

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Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

2022

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“…2 shows the maximum ZT achieved for bulk thermoelectric materials over the past six years as a function of temperature. 33–234…”

Section: Strategiesmentioning

confidence: 99%

Recent advances in designing thermoelectric materials

2022

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“…Materials with composition-dependent thermal conductivity are often used to enhance Z [ 2 , 9 , 10 , 11 ] since, by grading appropriately the stochiometry,

can be reduced, achieving so a consequent increment of Z [ 4 , 7 ]. We also observe that a further improvement of Z could be obtained by increasing the product

as function of c .…”

Section: Introductionmentioning

confidence: 99%

Approximation of Composition and Temperature Dependent Heat Conductivity and Optimization of Thermoelectric Energy Conversion in Silicon–Germanium Alloys

Cimmelli

Rogolino

2022

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We analyze the efficiency as thermoelectric energy converter of a silicon–germanium alloy with composition and temperature dependent heat conductivity. The dependency on composition is determined by a non-linear regression method (NLRM), while the dependency on temperature is approximated by a first-order expansion in the neighborhood of three reference temperatures. The differences with respect to the case of thermal conductivity depending on composition only are pointed out. The efficiency of the system is analyzed under the assumption that the optimal energy conversion corresponds to the minimum rate of energy dissipated. The values of composition and temperature which minimize such a rate are calculated as well.

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Thermoelectric performance of nanostructured PbSnTeSe high entropy thermoelectric alloy synthesized via spark plasma sintering

Cited by 18 publications

References 18 publications

Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

Investigation of PbSnTeSe High-Entropy Thermoelectric Alloy: A DFT Approach

Recent advances in designing thermoelectric materials

Approximation of Composition and Temperature Dependent Heat Conductivity and Optimization of Thermoelectric Energy Conversion in Silicon–Germanium Alloys

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