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.
Results
Showing 1 to 20 of 49 for “"device physics"”.
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Device Physics of Two-Dimensional Crystalline Materials
… (2D) electrons in condensed matter physics has two milestones: quantum Hall effects in semiconductor heterostructures and superconductivity in cuprates. In both, the 2D electrons are embedded in complex material structures. The discovery of graphene allows for the isolation of 2D …
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Device physics of perovskite light-emitting diodes
… The behaviour of PeLEDs is determined by the device processes including charge injection and transport, recombination and light extraction. Understanding the physics governing these processes is significant for controlling the performance of PeLEDs. This thesis focuses on the photonic and …
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Device Physics of Organic-Inorganic Hybrid Perovskite Semiconductors
… field-effect transistors (FETs) for improved device performance. The study begins by investigating electrochemical reactions occurring at the interface between the perovskite and gold metal electrode in perovskite single crystal FETs. By delaminating the electrodes and employing surface …
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Translating semiconductor device physics into nanoparticle films for electronic applications
… explores and quantifies some of the important device physics, parameters, and mechanisms of semiconductor nanocrystal quantum dot (QD) electronic devices, and photovoltaic devices in particular. This involves a variety of characterization techniques and their adaptations, as well as careful …
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Using Device Physics and Error Mitigation to Improve the Performance of Quantum Computers
… that include consideration of the underlying physics are paramount. To do this, we must reduce existing errors and understand how algorithms perform without error correction. In this dissertation, we provide contributions toward these goals. We organize these efforts into three groups. …
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Modeling gallium-nitride based high electron Mobility transistors : linking device physics to high voltage and high frequency circuit design
… application regimes requires accurate compact device models that are grounded in physics and can describe the non-linear terminal characteristics. Currently available compact models for HEMTs are empirical and hence are lacking in physical description of the device, which becomes a handicap in …
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Distributed Feedback Ridge Waveguide and Step-Graded Separate Confinement Quantum Well Heterostructure Lasers Grown by Metalorganic Chemical Vapor Deposition
… vapor deposition (MOCVD), compound semiconductor device research has flourished. Advancements in device physics as well as the development of coherent optical sources and high speed electronic devices have been achieved in both lattice-matched systems such as the GaAs-AlGaAs heterostructure, and …
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High-Performance Indium Gallium Phosphide/gallium Arsenide Heterojunction Bipolar Transistors
… performance, and characterization of these devices is required. This dissertation will discuss the design and implementation of high-performance InGaP/GaAs HBTs as well as study HBT device physics and characterization.
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A study of long wavelength strained quantum well lasers
In this thesis, the device physics of long wavelength strained quantum-well lasers is explored both experimentally and theoretically. The goal of this study is to understand how to optimize laser materials (active region and cladding layer) and cavity parameters (barrier height) so that the …
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Growth and Design of High-Performance InGaP/GaAs Heterojunction Bipolar Transistors Grown by Low -Pressure Metalorganic Chemical Vapor Deposition
Although device physics and semiconductor theory were an essential part of this research, few new theoretical calculations or predictions were made. Rather, this thesis relied heavily on the work of those, who early in the history of semiconductors, developed the theories of minority carrier …
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Theoretical Study of Carbon-Based Materials and Their Applications in Nanoelectronics
Continual scaling down of silicon device, which is the main driving force in device performance enhancement, is not sustainable as we approach the physical limits of silicon and it is foreseen that new materials and novel device structures will be required for future device improvements. In this …
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Energy efficient computing : from nanotubes to negative capacitance
… how by combining multiple advances - from new device physics to new nanomaterials to new device geometries - there is a feasible path towards realizing over an order of magnitude benefit is energy efficiency for digital very-large-scale integrated (VLSI) systems. As a case study, this thesis …
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Excitonics for Organic Electronics
… diodes (OLEDs). At the core of the device physics governing the stability and efficiency of OLEDs are tightly bound electron-hole pairs known as excitons. Here, the link between OLED excitonics and operational stability is studied in active OLEDs. First, the exciton distribution is …
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Material and device aspects of semiconducting two-dimensional crystals
… are considered promising candidates for future device applications, as many have large band gaps, high carrier mobilities, and enable devices with immunity to short channel effects in addition to compatibility with silicon CMOS processes.^ In this thesis, the fundamental device implications of …
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Analysis of randomly occurring high injection forces in an insulin delivery device
… as production numbers of an insulin injection device pass 200 million per year, testing continues to find sub-assemblies with too-high injection forces, seemingly at random. Up until now, no corrective action has been effective in preventing these problems. These non-conforming sub-assemblies …
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Development of Next Generation of High Voltage Poly Crystalline Silicon Thin Film Transistors
… requirement. A study on high voltage SOI and SOS devices is also carried out to transfer the knowledge acquired from them to polysilicon TFTs. Extensive numerical simulations have been performed using ISE TCAD and MEDICI device simulators. The experimental characteristics and the device physics of …
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High efficiency top-emitting organic light-emitting diodes: design and fabrication
… high-performance top-emitting OLEDs, regarding device efficiency and lifetime for both non-inverted and inverted structures. It is thus organized as follows: In Chapter 2, the basic physics of organic semiconductor materials are reviewed, including the electronic properties of organic …
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Redefining the Operation and Design Considerations of Organic Solar Cells: Role of Morphology and Defect States
… in performance relies on breakthroughs in device design, which requires profound understanding of the physics of device operation. A major challenge in the design of the state of the art OPV cells is that it requires randomly mixed two different organic semiconductors for its absorbing …
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Thermal, Electrical, and Spin Transport: Encompassing Low-Damping Ferromagnets and Antiferromagnetic/Ferromagnetic Heterostructures
… presenting unique advantages. Thermoelectric devices, based on the Seebeck effect, other a passive, carbon-free energy generating solution from waste heat. Although current thermoelectric technology encounters hurdles in achieving optimal efficiencies without intricate designs or complex …
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Development of an automated and scalable lab-on-a-chip platform with on-chip characterization
… chips, (3) an incomplete understanding of DMF device physics, and (4) lack of methods for performing on-chip characterization. This thesis aims to address these limitations. We describe the development of a control instrument and software capable of applying a precise electrostatic force and …
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