Abstract

PbSeTe-based quantum dot superlattice structures grown by molecular beam epitaxy have been investigated for applications in thermoelectrics. We demonstrate improved cooling values relative to the conventional bulk (Bi,Sb) 2 (Se,Te) 3 thermoelectric materials using a n-type film in a one-leg thermoelectric device test setup, which cooled the cold junction 43.7 K below the room temperature hot junction temperature of 299.7 K. The typical device consists of a substrate-free, bulk-like (typically 0.1 millimeter in thickness, 10 millimeters in width, and 5 millimeters in length) slab of nanostructured PbSeTe/PbTe as the n-type leg and a metal wire as the p-type leg.

Keywords

SuperlatticeMaterials scienceMolecular beam epitaxyThermoelectric effectThermoelectric materialsQuantum dotThermoelectric coolingOptoelectronicsSlabSubstrate (aquarium)Condensed matter physicsEpitaxyNanotechnologyComposite materialThermal conductivityLayer (electronics)PhysicsGeology

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Publication Info

Year
2002
Type
article
Volume
297
Issue
5590
Pages
2229-2232
Citations
2442
Access
Closed

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Cite This

T. C. Harman, Patrick J. Taylor, Michael Walsh et al. (2002). Quantum Dot Superlattice Thermoelectric Materials and Devices. Science , 297 (5590) , 2229-2232. https://doi.org/10.1126/science.1072886

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DOI
10.1126/science.1072886