Transverse Peltier effect in tilted Pb–Bi2Te3 multilayer structures

Kyarad, A.; Lengfellner, Hans

doi:10.1063/1.2385213

Cited by 53 publications

(25 citation statements)

References 10 publications

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“…Kyarad and Lengfellner [ 62 ] have reported transverse Peltier and transverse Seebeck effects in tilted superlattice structures made of Pb/Bi 2 Te 3 or Al/Si. Most homogeneous thermoelectric materials of interest do not have a crystal structure that allows such a transverse effect, but the creation of an artifi cial anisotropy as with a tilted superlattice can break the collinear requirement between the electrical and thermal fl uxes.…”

Section: D Nanostructuring: Nanodotsmentioning

confidence: 98%

Nanostructured Thermoelectrics: Big Efficiency Gains from Small Features

et al. 2010

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The field of thermoelectrics has progressed enormously and is now growing steadily because of recently demonstrated advances and strong global demand for cost-effective, pollution-free forms of energy conversion. Rapid growth and exciting innovative breakthroughs in the field over the last 10-15 years have occurred in large part due to a new fundamental focus on nanostructured materials. As a result of the greatly increased research activity in this field, a substantial amount of new data--especially related to materials--have been generated. Although this has led to stronger insight and understanding of thermoelectric principles, it has also resulted in misconceptions and misunderstanding about some fundamental issues. This article sets out to summarize and clarify the current understanding in this field; explain the underpinnings of breakthroughs reported in the past decade; and provide a critical review of various concepts and experimental results related to nanostructured thermoelectrics. We believe recent achievements in the field augur great possibilities for thermoelectric power generation and cooling, and discuss future paths forward that build on these exciting nanostructuring concepts.

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Section: D Nanostructuring: Nanodotsmentioning

confidence: 98%

Nanostructured Thermoelectrics: Big Efficiency Gains from Small Features

et al. 2010

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“…The figure of merit would have been close to that of a longitudinal (Bi-Sb) 2 Te 3 —Ni thermocouple. Other combinations would probably be superior, perhaps with the nickel being replaced by an n-type conductor such as bismuth, though Kyarad and Lengfellner [58] used a metal, lead, in conjunction with a bismuth telluride in their transverse device.…”

Section: Practical Considerationsmentioning

confidence: 99%

Bismuth Telluride and Its Alloys as Materials for Thermoelectric Generation

2014

Materials

489

305

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Bismuth telluride and its alloys are widely used as materials for thermoelectric refrigeration. They are also the best materials for use in thermoelectric generators when the temperature of the heat source is moderate. The dimensionless figure of merit, ZT, usually rises with temperature, as long as there is only one type of charge carrier. Eventually, though, minority carrier conduction becomes significant and ZT decreases above a certain temperature. There is also the possibility of chemical decomposition due to the vaporization of tellurium. Here we discuss the likely temperature dependence of the thermoelectric parameters and the means by which the composition may be optimized for applications above room temperature. The results of these theoretical predictions are compared with the observed properties of bismuth telluride-based thermoelements at elevated temperatures. Compositional changes are suggested for materials that are destined for generator modules.

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“…A concomitant Peltier effect (an electrothermal phenomena, 81 where electrical current could cause a cooling in the transverse direction) was also considered in an alternately layered Pb/Bi 2 Te 3 composite with a recorded temperature difference of ∼ 22 K, transverse to the direction of the applied electrical currents. 86 Thickness ratio (of the Pb thickness to that of the Bi 2 Te 3 ) dependence was noted for the S anisotropy (parallel vs. perpendicular) with a maximum for a ratio close to unity.…”

Section: B Experimental Investigationsmentioning

confidence: 99%

Layered thermal metamaterials for the directing and harvesting of conductive heat

et al. 2015

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The utility of a metamaterial, assembled from two layers of nominally isotropic materials, for thermal energy re-orientation and harvesting is examined. A study of the underlying phenomena related to heat flux manipulation, exploiting the anisotropy of the thermal conductivity tensor, is a focus. The notion of the assembled metamaterial as an effective thermal medium forms the basis for many of these investigations and will be probed. An overarching aim is to implement in such thermal metamaterials, functionalities well known from light optics, such as reflection and refraction, which in turn may yield insights on efficient thermal lensing. Consequently, the harness and dissipation of heat, which are for example, of much importance in energy conservation and improving electrical device performance, may be accomplished. The possibilities of energy harvesting, through exploiting anisotropic thermopower in the metamaterials is also examined. The review concludes with a brief survey of the outstanding issues and insights needed for further progress.

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Transverse Peltier effect in tilted Pb–Bi2Te3 multilayer structures

Cited by 53 publications

References 10 publications

Nanostructured Thermoelectrics: Big Efficiency Gains from Small Features

Nanostructured Thermoelectrics: Big Efficiency Gains from Small Features

Bismuth Telluride and Its Alloys as Materials for Thermoelectric Generation

Layered thermal metamaterials for the directing and harvesting of conductive heat

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