2021
DOI: 10.1002/aenm.202101122
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Physical Insights on the Lattice Softening Driven Mid‐Temperature Range Thermoelectrics of Ti/Zr‐Inserted SnTe—An Outlook Beyond the Horizons of Conventional Phonon Scattering and Excavation of Heikes’ Equation for Estimating Carrier Properties

Abstract: Most of the best known SnTe‐based materials exhibit an attractive thermoelectric figure of merit (zT) only at the high‐temperature regime, but their performance at the low‐mid temperature ranges is quite uninspiring, and this discordance necessitates a large temperature gradient (∆T ≥ 550 K) to effectuate a reasonable efficiency, η. Here, the transition elements, Ti and Zr, that have not been used in the past are tried as dopants for SnTe and an enhanced device/average zT and/or η are reported with a lower ∆T … Show more

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Cited by 52 publications
(52 citation statements)
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“…The efficiency of a thermoelectric module is proportional to the figure of merit, consequently, it is expected to reach a high ZT to obtain high performances. However, the efficiency is still limited for the thermogeneration of electricity compared to electricity produced by turbines [2], and most of the new thermoelectric materials, as well as the conventional materials, are made of rare, expensive and toxic elements such as chalcogen or pnictogen atoms or have stability problems [3][4][5]. To overwhelm these last problems, silicide intermetallics such as Mg 2 Si 1-x Sn x , higher manganese silicides or β-FeSi 2 were developed [6].…”
Section: Introductionmentioning
confidence: 99%
“…The efficiency of a thermoelectric module is proportional to the figure of merit, consequently, it is expected to reach a high ZT to obtain high performances. However, the efficiency is still limited for the thermogeneration of electricity compared to electricity produced by turbines [2], and most of the new thermoelectric materials, as well as the conventional materials, are made of rare, expensive and toxic elements such as chalcogen or pnictogen atoms or have stability problems [3][4][5]. To overwhelm these last problems, silicide intermetallics such as Mg 2 Si 1-x Sn x , higher manganese silicides or β-FeSi 2 were developed [6].…”
Section: Introductionmentioning
confidence: 99%
“…For instance, thermal conductivity comprises lattice (κ lat ), bipolar (κ bi ), and electrical (κ ele ) components [12][13][14][15][16][17][18][19][20][21]. Much of the work in decreasing thermal conductivity is aimed towards κ lat , utilizing strategies such as downscaling and isovalent substitution, which hinder the transport of heat-carrying acoustic phonons [22][23][24][25][26][27][28][29][30][31][32][33][34]. More recently, machine learning has been popularly used in conjunction with materials science discovery and air materials development [35][36][37][38].…”
Section: Thermoelectric Devicesmentioning
confidence: 99%
“…The absence of lone pairs in Mg/Mn weakens the quenching of lone pairs in PbTe, resulting in lower L band energy [36]. In addition, band convergence in PbTe and SnTe can be achieved by doping of Zn, Cd, Mg, Mn, or Ca, all of which are without s 2 lone pair [37][38][39][40][41][42][43][44]. A very useful reference for designing band convergence and resonant doping in binary chalcogenides can be found in Ref.…”
Section: Band Convergencementioning
confidence: 99%