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Showing 1 to 20 of 49 for “"Defect-engineering"”.
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Point defect engineering in germanium
… to silicon, little is known about the point defects in germanium. The goal of the present doctoral work is to remedy this gap. To this end, we have used radiation (gamma rays, alpha particles, and neutrons) to controllably introduce point defects in crystalline germanium, which were then …
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Defect Engineering for Controlling Semiconductor Diffusion
Bulk point defects such as vacancies and interstitial atoms govern many aspects of the behavior of crystalline solids, especially for semiconductors. Essentially no literature has focused upon bulk point defects as the mediators of the physics of surface-bulk coupling, however. We have discovered …
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Defect engineering of metal oxide semiconductors
Defects in semiconductors have been studied for many years, with a view toward controlling their behavior through various forms of defect engineering. In the Si-based microelectronics industry, numerous methods to characterize and control the behavior of defects have been developed, including novel …
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Advanced Methods for Defect Engineering in Silicon
… to study the effects of two newly discovered defect engineering mechanisms: the use of surface chemistry and optical stimulation on boron diffusion and activation during thermal annealing for ultrashallow junction formation. The work has a strong focus on the use of mathematical modeling to …
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New mechanisms for defect engineering in titanium dioxide
… upon the types and concentrations of crystalline defects it contains. The concentrations of various defects can alter the electrical properties of a solid. Currently, defect engineering is applied extensively within the microelectronic industry but has not been utilized much in catalysis research. …
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Defect engineering of InP and InGaAs for optoelectronic applications
… One branch of current research involves defect production and diffusion, which is known to greatly modify the electrical and optical properties of these semiconductors. Ion implantation is one way of introducing a large amount of defects, and a significant part of this work focuses on …
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Defect engineering of InP and InGaAs for optoelectronic applications
… One branch of current research involves defect production and diffusion, which is known to greatly modify the electrical and optical properties of these semiconductors. Ion implantation is one way of introducing a large amount of defects, and a significant part of this work focuses on …
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Surface-mediated mechanisms for defect engineering in zinc oxide
… depends upon the types and concentrations of the defects it contains. In semiconducting metal oxides like zinc oxide, the concentration and diffusion of oxygen point defects, like interstitials and vacancies, play a central role in various physical phenomena, such as gas sensing, bipolar …
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Surface-mediated mechanisms for defect engineering in metal oxides
… and spatial distributions of solid point defects such as vacancies and interstitial atoms influence the performance of metal oxides in gas sensing, electronics, photonics and solar-induced photochemistry for fuel production and environmental cleanup. Controlling these aspects of defect …
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Hafnium Metal-Organic Frameworks: Formation Routes and Defect Engineering
… Metal-Organic Frameworks: Formation Routes and Defect Engineering Francesca Catherine Noriko Firth Abstract Metal-organic frameworks (MOFs) consist of metal nodes or clusters linked by multidentate organic ligands. By altering the identity of these components, the properties of the MOF can be …
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Cation Site Occupancy and Defect Engineering in Perovskite Heterostructures
… magnetoelectric devices. Cation and anion point defects collectively affect the structural, electrical, and magnetic properties of complex oxides. At the same time, such defects allow one to manipulate the behavior and tailor it to desired characteristics. Furthermore, the formation of atomic …
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Defect Engineering in Cuprous Oxide (Cu₂O) Solar Cells
… for photovoltaics. Lastly. I apply bulk defect engineering to manipulate the intrinsic point defect structure of Cu₂O towards improved device performance. The key results will inform the processing conditions for improving mobility and minority carrier lifetime in Cu₂O. Keywords - …
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Optical and Interface-Based Methods of Defect Engineering in Silicon
… of the Si-SiO 2 interface affect diffusion of defects during annealing. The optical method elucidates the origin of a nonthermal influence of illumination on boron diffusion. The results show that photostimulated changes in diffusion stem primarily from light interacting with interstitial …
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Defect engineering of cuprous oxide thin-films for photovoltaic applications
… materials and device geometries to engineer defects in Cu₂O thin-films and overcome the low power-conversion-efficiency of Cu 20-based solar cells. First, nitrogen doping is proposed as an effective p-type doping method to control optical and electrical properties of Cu₂O thin-films. The …
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New Forms of Defect Engineering in Silicon and Metal Oxide Semiconductors
… depend upon the types and concentrations of the defects it contains. Defects mediate foreign-atom diffusion in semiconductors, affect the performance of photo-active devices, the effectiveness of catalysts, the sensitivity of solid-state electrolyte sensors, and the efficiency of devices for …
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Defect engineering of polycrystalline titanium dioxide synthesized by atomic layer deposition
… to the principles of microelectronic devices. Defect engineering is used extensively in the semiconductor processing industry to produce devices with well-defined physical properties (e.g., electrical conductivity, switching frequency, power consumption). Polycrystalline TiO2 is an attractive …
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Structural defect engineering of tin (II) sulfide thin films for photovoltaics
… In this work, I assess the impact of structural defects and anisotropy on the minority-carrier lifetime and other key device parameters, shedding light on the path to high-efficiency SnS-based photovoltaics. SnS thin films are deposited by thermal evaporation in a range of growth temperatures …
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Nanoscale defect engineering and mapping for cathode materials of multivalent ion batteries
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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New strategies for application of defect engineering to TiO2 based photocatalytic materials
… through the application of principles related to defect engineering. Specifically, TiO2 has already demonstrated promise as a catalytic material for environmental remediation by photocatalysis in aqueous media as well as water splitting for hydrogen fuel production by photo/electrocatalysis. There …
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Oxygen defect engineering for silicon solar cell applications : process design and modeling
… of silicon solar cells are oxygen ring defects that are incorporated into the material during growth. These defects decrease overall cell efficiencies by around 20% (rel.) resulting in a yield loss of about 1/4 h of each monocrystalline silicon ingot. To control the oxygen defects and …
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