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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Simultaneous enhancement in the power factor and thermoelectric performance of copper sulfide by In2S3 doping
Qing-Long Meng,Shuang Kong,Shuang Kong,Zhiwei Huang,Zhiwei Huang,Yuanhu Zhu,Heng-Chang Liu,Heng-Chang Liu,Xiaowei Lu,Xiaowei Lu,Peng Jiang,Xinhe Bao +11 more
TL;DR: In this paper, the authors demonstrate simultaneous enhancement of the power factor and thermoelectric performance of Cu2S upon the introduction of In2S3, which leads to a high power factor of 1361 μW m−1 K−2 at 850 K.
Journal ArticleDOI
Simulation of Thermoelectric Performance of Bulk SrTiO3 with Two‐Dimensional Electron Gas Grain Boundaries
TL;DR: In this paper, the authors used density functional theory calculations and Boltzmann transport theory to simulate the thermoelectric properties of SrTiO3 ceramics with two-dimensional electron gas grain boundaries (GBs).
Journal ArticleDOI
Gigantic Phonon-Scattering Cross Section To Enhance Thermoelectric Performance in Bulk Crystals
Junphil Hwang,Junphil Hwang,Hoon Kim,Mi Kyung Han,Jisook Hong,Ji Hoon Shim,Jang-Yeul Tak,Young Soo Lim,Yingshi Jin,Jiyong Kim,Hwanjoo Park,Dong Keon Lee,Je-Hyeong Bahk,Sung Jin Kim,Woochul Kim +14 more
TL;DR: This work proposes an approach based on coated-grain structures to effectively reduce the thermal conductivity to a much greater degree when compared to that done by conventional nanodot nanocomposite in thermoelectric energy conversions.
Journal ArticleDOI
Thermoelectric Materials: A Brief Historical Survey from Metal Junctions and Inorganic Semiconductors to Organic Polymers
Prospero J. Taroni,Prospero J. Taroni,Itziar Hoces,Natalie Stingelin,Martin Heeney,Emiliano Bilotti +5 more
TL;DR: In this article, the EPSRC Doctoral Training Centre in Plastic Electronics (DTC-DTC) grant number EP/G037515/1 was used for research at the University of Sheffield.
Journal ArticleDOI
Thermionic-tunneling multilayer nanostructures for power generation
TL;DR: In this article, a method for power generation based on nano-engineered interface design with partially filled gap is presented, which allows a substantial temperature difference to exist between heat source and heat sink or two electrodes, thereby maximizing heat source utilization.
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.