Influence of Yb-doping on the thermoelectric properties of Pb1−xYbxTe alloy synthesized using solid-state microwave

Hmood, A.; Kadhim, A.; Hassan, H. Abu

doi:10.1016/j.jallcom.2011.12.044

Cited by 41 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approach is based on a comprehensive method reported by us formerly 8 this study, we rely on several experimental studies, reporting the effects of the introduction of different doping elements to the PbTe compound; for example, Na and K, 22 La, Pr, and Gd, 23 Ce, 24 Sm, 25 Eu, 26 Yb, 27 Tl, 28 Sn, 29 Pd, 30 V, 31 S, 32 Cl, 33 and Fe. 34 We note that several of the dopants examined in our study have not been tested experimentally so far, and we consider the current predictive approach to be valuable on both scientific and technological aspects.…”

mentioning

confidence: 99%

Towards a predictive route for selection of doping elements for the thermoelectric compound PbTe from first-principles

Joseph

Amouyal

2015

Journal of Applied Physics

View full text Add to dashboard Cite

Striving for improvements of the thermoelectric (TE) properties of the technologically important lead telluride (PbTe) compound, we investigate the influence of different doping elements on the thermal conductivity, Seebeck coefficient, and electrical conductivity applying density functional theory calculations. Our approach combines total-energy calculations yielding lattice vibrational properties with the Boltzmann transport theory to obtain electronic transport properties. We find that doping with elements from the 1st and 3rd columns of the periodic table reduces the sound velocity and, consequently, the lattice thermal conductivity, while 2nd column dopants have no such influence. Furthermore, 1.6 at. % doping with 4th and 5th column elements provides the highest reduction of lattice thermal conductivity. Out of this group, Hf doping results in maximum reduction of the sound velocity from 2030 m s−1 for pure PbTe to 1370 m s−1, which is equivalent to ca. 32% reduction of lattice thermal conductivity. The highest power factor values calculated for 1.6 at. % doping range between 40 and 56 μW cm−1 K−2, and are obtained for substitution with dopants having the same valence as Pb or Te, such as those located at the 2nd, 14th, and 16th columns of the periodic table. We demonstrate how this method may be generalized for dopant-selection-oriented materials design aimed at improving TE performance of other compounds.

show abstract

mentioning

confidence: 99%

Towards a predictive route for selection of doping elements for the thermoelectric compound PbTe from first-principles

Joseph

Amouyal

2015

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…At the same time, YbTe has the same NaCl-type structure (space group Fm3m) as the host PbSe 0.2 Te 0.8 , with a slightly smaller lattice parameter (a YbTe ¼ 6.365 Å, a PbSe0:2Te0:8 ¼ 6:395 A) [15,16]. The atomic mass of Yb is 80% compared with the atomic mass of Pb, and the substitution of Yb for Pb induces an increase in the lattice constant a (Å) of the host lattice material PbTe [17]. However, the nature of bonding in Pb 1Àx Yb xSe 0.2 Te 0.8 is rather complicated and comprises a mixture of ionic, covalent, and metallic bonds.…”

Section: Rietveld Analysis Of X-ray Diffraction Profilesmentioning

confidence: 99%

Enhancement of electrical transport through the anisotropic nanostructure performance of heavily Yb-doped PbSe0.2Te0.8 thin films

Hmood

Kadhim

Hassan

2012

Materials Chemistry and Physics

Self Cite

View full text Add to dashboard Cite

“…Lei et al [ 44 ] also successfully synthesized a TiNiSn half-Heusler compound by heating it in a microwave device for 5 min. In addition, excellent thermoelectric material systems such as Mg 2 Si [ 45 ], PbTe [ 46 ] and Bi 2 Te 3 [ 47 ] have been documented to prove the successful application of a microwave in their preparation. In this work, high-purity and high-density Ti 1− x Nb x (FeCoNi)Sb ( x = 0, 0.01, 0.03, 0.05, 0.07 and 0.1) pseudo-ternary half-Heusler alloys were prepared via microwave synthesis combined with the ball-milling and rapid hot-pressing sintering processes, and the effects of Nb substitution at the Ti site on its phase composition, microstructure and thermoelectric properties were studied.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermoelectric Properties of Nb-Doped Ti(FeCoNi)Sb Pseudo-Ternary Half-Heusler Alloys Prepared Using the Microwave Method

Zhang

Kong²,

Hou³

et al. 2023

Materials

View full text Add to dashboard Cite

Pseudo-ternary half-Heusler thermoelectric materials, which are formed by filling the B sites of traditional ternary half-Heusler thermoelectric materials of ABX with equal atomic proportions of various elements, have attracted more and more attention due to their lower intrinsic lattice thermal conductivity. High-purity and relatively dense Ti1−xNbx(FeCoNi)Sb (x = 0, 0.01, 0.03, 0.05, 0.07 and 0.1) alloys were prepared via microwave synthesis combined with rapid hot-pressing sintering, and their thermoelectric properties are investigated in this work. The Seebeck coefficient was markedly increased via Nb substitution at Ti sites, which resulted in the optimized power factor of 1.45 μWcm−1K−2 for n-type Ti0.93Nb0.07(FeCoNi)Sb at 750 K. In addition, the lattice thermal conductivity was largely decreased due to the increase in phonon scattering caused by point defects, mass fluctuation and strain fluctuation introduced by Nb-doping. At 750 K, the lattice thermal conductivity of Ti0.97Nb0.03(FeCoNi)Sb is 2.37 Wm−1K−1, which is 55% and 23% lower than that of TiCoSb and Ti(FeCoNi)Sb, respectively. Compared with TiCoSb, the ZT of the Ti1−xNbx(FeCoNi)Sb samples were significantly increased. The average ZT values of the Nb-doped pseudo-ternary half-Heusler samples were dozens of times that of the TiCoSb prepared using the same process.

show abstract

Influence of Yb-doping on the thermoelectric properties of Pb1−xYbxTe alloy synthesized using solid-state microwave

Cited by 41 publications

References 31 publications

Towards a predictive route for selection of doping elements for the thermoelectric compound PbTe from first-principles

Towards a predictive route for selection of doping elements for the thermoelectric compound PbTe from first-principles

Enhancement of electrical transport through the anisotropic nanostructure performance of heavily Yb-doped PbSe0.2Te0.8 thin films

Enhanced Thermoelectric Properties of Nb-Doped Ti(FeCoNi)Sb Pseudo-Ternary Half-Heusler Alloys Prepared Using the Microwave Method

Contact Info

Product

Resources

About