Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Thermoelectric Transport"”.
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Thermoelectric transport in rare-earth compounds
The focus of this thesis lies on the thermoelectric transport properties of rare-earth compounds containing Ce, Eu, and Yb. These systems have been investigated either to study fundamental problems or to evaluate their potential for thermoelectric applications.
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Two-dimensional thermoelectric transport for electronics cooling
This Dissertation was approved for publication on 2024-11-07 at 17:55.
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Charge and Thermoelectric Transport in Metal Halide Perovskite Semiconductors
… by a focus to understand the underlying charge transport physics in these lead-based and tin-based perovskite systems. In Chapter 3, we identified a strong causal relationship between metal contact reaction and non-ideal FET characteristics in CsFAMAPbI<sub>3</sub> perovskite FETs. Prolonged …
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Modeling of Joule heating and thermoelectric transport in thin film silicon for SJEM measurement
… distribution. In Chapter 2, Joule heating and Thermoelectric heating in 1st harmonic and 2nd harmonic signals are analyzed by comparing the terms in governing equations and simulation results. Chapter 3 optimizes device design of doped Si and experimental conditions for future measurement. The …
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Charge and Thermoelectric Transport in Semicrystalline Conjugated Polymers and Single-Walled Carbon Nanotube Networks
… electronics, flexible optoelectronic devices and thermoelectric generators. In the past two decades the development of high-mobility donor-acceptor copolymers outperforming amorphous silicon, employed in commercial display technologies, and the ability to tune the diameter distribution in SWCNT …
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THERMAL AND THERMOELECTRIC PROPERTIES OF TWO-DIMENSIONAL HETEROSTRUCTURES
… heat management of electronic devices while good thermoelectric properties are desired for energy-conversion devices. Despite numerous studies on the electrical and optical properties of 2D materials, less attention has been paid to their thermal and thermoelectric properties. In this thesis, we …
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Transport studies in graphene-based materials and structures
… studies about the thermal, electronic and thermoelectric transport properties in graphene-based systems. We employ the molecular dynamic simulations to study the thermal transport in graphene nanoribbons (GNRs) exhibiting various properties, including chirality dependent thermal …
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Thermoelectric Energy Conversion: First-principles Simulations, Energy Harvesting and Deep Cooling Systems
Thermoelectric devices can directly convert heat into electricity and electrical power into cooling or heating without moving parts. The energy conversion efficiency is dominated by the materials’ figure of merit zT, which is linearly proportional to the electrical conductivity, the square of the …
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Magnetoresistance and Thermoelectricity in Quasi-Low Dimensional Semimetals
… macroscopic responses observed in electric and thermoelectric transport experiments. In this thesis we present a com- prehensive study of the electronic bands and transport properties of the quasi-1D layered material ZrTe₅. For vacancy doped crystals, we report a transport, thermodynamic, and …
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Ab initio study of electron transport in lead telluride
… years have witnessed significant enhancement of thermoelectric figure of merit of lead telluride (PbTe) via nanostructures. Despite the experimental progress, current understanding of the electron transport in PbTe is based on either band structure simulated using first-principles in combination …
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The effect of quantum confinement on the thermoelectric figure of merit
The thermoelectric figure of merit (Z) determines the usefulness of a material for thermoelectric energy conversion applications. Since the 1960's, the best thermoelectric material has been Bi2Te3 alloys, with a ZT of 1.0 at a temperature ofT = 300 K. The advancement of nano-scale technologies has …
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Synthesis and thermoelectric properties of Mg2Si-Mg2Sn solid solutions for waste heat recovery
Mg2Si-Mg2Sn solid solutions are promising thermoelectric materials for vehicle waste-heat recovery owing to their high figure-of-merit (ZT), light weight, low cost, and non-toxicity. The optimized ZT of Mg2Si0.4Sn0.6 peaks at ∼ 750 K because its relatively narrow band gap results in the pronounced …
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Study of electrical and thermal transport in low-dimensional structures aiming for improving thermoelectric efficiency
Thermoelectric engineering has been getting much attention anticipating its potential to serve an important role in producing clean energy out of waste heat dissipated from industries, residential processes, and transportation. However, thermoelectric efficiency has been limited to a non-practical …
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Thermoelectric and Charge Transport in Doped Semi-Crystalline Polymers
… light-emitting diodes, solar cells as well as thermoelectrics. Compared with their inorganic counterparts, OSCs have several advantageous features including low cost, lightweight, mechanically robustness, ease of synthesis and tailoring material properties, environmental friendless, …
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Thermoelectric Properties and Transport of Semicrystalline Conjugated Polymer and Single-Wall Carbon Nanotube Composites
… carbon nanotubes (CNT):polymer composites for thermoelectric applications have greatly expanded in recent years, aiming to combine the high power factor of CNT networks and the low thermal conductivity of polymer matrix. Many attempts have been made on achieving the …