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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Recent Progress in Bi-Te-based Thermoelectric Materials
TL;DR: In this paper, a review of nanostructured Bi-Te-based thermoelectric (TE) materials for large-scale cooling and power generation applications is presented.
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Interfacial advances yielding high efficiencies for thermoelectric devices
Wenjie Wu,Wenjie Wu,Guang-Kun Ren,Xuxuan Chen,Liu Yinke,Zhifang Zhou,Jiangfeng Song,Yan Shi,Jia-Ming Jiang,Yuanhua Lin +9 more
TL;DR: In this paper, three different interfacial issues of thermoelectric (TE) devices are systematically investigated, and it is demonstrated that the related improvements will be beneficial for increasing their conversion efficiency.
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Enhanced Thermoelectric Properties for PEDOT:PSS/Undoped Ge Thin‐Film Bilayered Heterostructures
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Understanding the Rocksalt-to-Wurtzite phase transformation through microstructural analysis of (Al,Sc)N epitaxial thin films
TL;DR: In this paper, the microstructural details and epitaxial relationships between phases were uncovered by capturing what is essentially a thin-film snapshot of the transformation after growth of AlxSc1-xN films with a composition chosen to be close to the equilibrium phase boundary between wurtzite and rocksalt.
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Observation of Energy-Dependent Carrier Scattering in Conducting Polymer Nanowire Blends for Enhanced Thermoelectric Performance.
Xinyi Chen,Wen Shi,Kun Zhang +2 more
TL;DR: This work sheds light on the mechanism that can be adopted to design soft but high-performance thermoelectric materials with conducting polymer blends and quantitively demonstrates that the energy barrier involves energy-dependent carrier scattering at nanowire heterojunctions, which contributes to the enhanced the Seebeck coefficients and thus power factors.
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.