Journal ArticleDOI
Improved Thermoelectric Power Factor in Metal-Based Superlattices
Daryoosh Vashaee,Ali Shakouri +1 more
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TLDR
It is shown that metal-based superlattices with tall barriers can achieve a large effective thermoelectric figure of merit (ZT > 5 at room temperature), a key parameter to achieving high performance is the nonconservation of lateral momentum during the thermionic emission process.Abstract:
In this paper we present a detailed theory of electron and thermoelectric transport perpendicular to heterostructure superlattices. This nonlinear transport regime above barriers is also called heterostructure thermionic emission. We show that metal-based superlattices with tall barriers can achieve a large effective thermoelectric figure of merit (ZT > 5 at room temperature). A key parameter to achieving high performance is the nonconservation of lateral momentum during the thermionic emission process. Conservation of lateral momentum is a consequence of translational symmetry in the plane of the superlattice. We also discuss the use of nonplanar barriers and embedded quantum dot structures to achieve high thermoelectric conversion efficiency.read more
Citations
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Journal ArticleDOI
Correction: Ensemble-machine-learning-based correlation analysis of internal and band characteristics of thermoelectric materials
TL;DR: In this article, a dual-route machine learning system was developed to extract the relationship between the features from materials and the ones from band structure, which can help to set up a bridge between the feature significance and the thermal electric properties, such as Seebeck coefficient, and provide theoretical guidance regarding the designing of a material with excellent thermoelectric properties.
Dissertation
Transverse Thermoelectric Effects for Cooling and Heat Flux Sensing
TL;DR: In this article, the authors present a Table of Table of contents for the paper "Acknowledgements and acknowledgements of the authors of this paper: https://www.goprocessor.org/
Journal ArticleDOI
Enhanced thermoelectric properties of Ag-doped MnO2 single crystal nanowires for room-temperature application
TL;DR: In this article, a series of Mn1−xAgxO2 (x = 0, 0.01 wt), 0.02 wt, 0.05 wt, and 0.1 wt%) single crystal nanowires have been firstly synthesized by a simple and green chemical vapor deposition (CVD) method.
DissertationDOI
Superionic Noble Metal Chalcogenide Thermoelectrics
TL;DR: In this paper, the results of Te-doping of Ag2Se show that reducing the carrier concentration is possible by reducing the maximum Fermi level in the material, which can be achieved by scaling only the Seebeck coefficient and electrical conductivity.
Dissertation
Solar thermoelectrics for small scale power generation
TL;DR: In this paper, the authors have shown that the solar thermoelectric generators (STEGs) using cheap parabolic concentrators with high ZT modules can be a viable and a cost effective alternative to solar photovoltaics for distributed power generation.
References
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Journal ArticleDOI
Thin-film thermoelectric devices with high room-temperature figures of merit
TL;DR: Th thin-film thermoelectric materials are reported that demonstrate a significant enhancement in ZT at 300 K, compared to state-of-the-art bulk Bi2Te3 alloys, and the combination of performance, power density and speed achieved in these materials will lead to diverse technological applications.
Journal ArticleDOI
Quantum dot superlattice thermoelectric materials and devices.
TL;DR: It is demonstrated that improved cooling values relative to the conventional bulk (Bi,Sb)2(Se,Te)3thermoelectric materials using a n-type film in a one-leg thermoelectrics device test setup, which cooled the cold junction 43.7 K below the room temperature hot junction temperature of 299.8 K.
Journal ArticleDOI
Heterostructure integrated thermionic coolers
Ali Shakouri,John E. Bowers +1 more
TL;DR: In this paper, a single-stage room temperature cooling of high power electronic and optoelectronic devices is achieved by selective emission of hot electrons over a barrier layer from the cathode to the anode.
Journal ArticleDOI
Multilayer Thermionic Refrigeration
TL;DR: In this paper, a new method of refrigeration is proposed by thermionic emission of electrons over Schottky barriers between metals and semiconductors, which can have only a small temperature difference.
Journal ArticleDOI
Electronic and thermoelectric transport in semiconductor and metallic superlattices
Daryoosh Vashaee,Ali Shakouri +1 more
TL;DR: In this article, a detailed theory of nonisothermal electron transport perpendicular to multilayer superlattice structures is presented, and the currentvoltage and cooling power density are calculated using Fermi-Dirac statistics, density-of-states for a finite quantum well and the quantum mechanical reflection coefficient.