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Thermal Transport Modeling Of Semiconductor Materials From First Principles, Aliya Qureshi
Thermal Transport Modeling Of Semiconductor Materials From First Principles, Aliya Qureshi
Masters Theses
Over the past few years, the size of semiconductor devices has been shrinking whereas the density of transistors has exponentially increased. Thus, thermal management has become a serious concern as device performance and reliability is greatly affected by heat. An understanding of thermal transport properties at device level along with predictive modelling can lead us to design of new systems and materials tailored according to the thermal conductivity. In our work we first review different models used to calculate thermal conductivity and examine their accuracy using the experimentally measured thermal conductivity for Si. Our results suggest that empirically calculated rates …
Extrinsic Effects On Heat And Electron Transport In Two-Dimensional Van-Der Waals Materials- A Boltzmann Transport Study, Arnab K. Majee
Extrinsic Effects On Heat And Electron Transport In Two-Dimensional Van-Der Waals Materials- A Boltzmann Transport Study, Arnab K. Majee
Masters Theses
Two-dimensional van der Waals materials have been a subject of intense research interest in recent years. High thermal conductivity of graphene can be utilized for many thermal management applications. In spite of possessing very high electron mobility, graphene can’t be used as transistors because of the absence of band gap; however transition metal dichalcogenides are another class of two-dimensional van der Waals materials with inherent band gap and show a great promise for future nanoelectronic applications. But in order to tailor these properties for commercial applications, we should develop a better understanding of the effect of extrinsic factors like size, …
Improving Efficiency Of Thermoelectric Devices Made Of Si-Ge, Si-Sn, Ge-Sn, And Si-Ge-Sn Binary And Ternary Alloys, Seyedeh Nazanin Khatami
Improving Efficiency Of Thermoelectric Devices Made Of Si-Ge, Si-Sn, Ge-Sn, And Si-Ge-Sn Binary And Ternary Alloys, Seyedeh Nazanin Khatami
Masters Theses
Thermoelectric devices with the ability to convert rejected heat into electricity are widely used in nowadays technology. Several studies have been done to improve the efficiency of these devices. However, because of the strong correlation between thermoelectric properties (electrical conductivity, Seebeck coefficient, and thermal conductivity including lattice and electron counterpart), improving ZT has always been a challenging task. In this study, thermal conductivity of group IV-based binary and ternary alloys such as SiGe, SiSn, GeSn, and SiGeSn has been studied. Phonon Boltzmann Transport Equation has been solved in the relaxation time approximation including intrinsic and extrinsic (in the presence of …