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 20 of 300 for “"Passivation"”.
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Porous silicon surface passivation and optical properties
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Electronic structure, defect formation and passivation of 2D materials
… make defect states chemically inactive, namely passivation. The S vacancy is the most important defect in mechanically exfoliated 2D MoS2. We found that in the most successful superacid bis(trifluoromethane) sulfonamide (TFSI) treatment, H is the passivation agent. A symmetric adsorption …
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Modeling hydrogen diffusion for solar cell passivation and process optimization
A diffusion model for hydrogen (H) in crystalline silicon was established which takes into account the charged state conversion, junction field, mobile traps, and complex formation and dissociation at dopant and trap sites. Carrier exchange among the various charged species is a "fast" process …
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The effect of hydrogen on the passivation process of iron
A thorough survey of the literature relating to the state of hydrogen in metals, factors influencing solubility and diffusion parameters has been reported. The experimental techniques available for studying these properties have been reviewed and the related theories of passivity compared as a …
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Rapid thermal processing of silicon solar cells-passivation and diffusion
Diese Doktorarbeit konzentriert sich auf der Entwicklung eines optimierten Solarzellen-prozesses für Czochralski(Cz) Siliciummaterialien, auf die Charakterisierung der Oberflächenpassiveierung und auf die Diffusion mittels eines raschen thermischen Prozess (RTP). <br>Bordotierte …
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Impedance Measurement of Cells; Experiment and Analysis of Passivation Layer
… cells. Further, a component of the sensor, the passivation layer has been investigated for its contribution to the measured impedance in a quantitative manner.
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Co-reactant interactions with CVD surfaces: Activation or passivation of growth
… in the inherent chemical properties or in the passivation treatments. A robust ASD process must ensure that no nucleation occurs on the oxide over the total time needed to deposit the desired film thickness on the metal. Here, I show that this can be accomplished by continuously injecting a …
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Chemical Modifications and Passivation Approaches in Metal Halide Perovskite Solar Cells
… cation doping. Then, we demonstrate a novel passivation approach in alloyed perovskite films to inhibit the ion segregation and parasitic non-radiative losses, which are key barriers against the continuous bandgap tunability and potential for high-performance of metal halide perovskites in …
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Improvement of carbon nanotube-based field-effect transistors by cleaning and passivation
… of an oxygen plasma. Beyond that, the passivation of the final, working devices is developed further, as their typical definition as diffusion barrier is expanded by the reduction of parasitic capacitances in the transistor. In this context, two so far barely considered materials, …
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Passivation of III–V Nanowires Using Dielectrics Deposited by Atomic Layer Deposition
… characteristics of these III–V NWs via surface passivation and encapsulation will be essential for their adoption into commercial applications. This thesis investigates surface passivation of InAs nanowire field-effect transistors (NWFETs) using alumina dielectric layers [6]. Passivation refers …
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Novel etch studies and passivation techniques on InAs/GaSb superlattice based infrared detectors
… by optimization of mesa delineation and surface passivation techniques. The first part of the dissertation works on the development of optimized etching scheme for the 400μm x 400μm area single-pixel SLS detectors and for 25μm x 25μm area focal plane arrays (FPAs). Firstly, optimization of wet …
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Study of Si/SiO2 interface passivation and SiO2 reliability on deuterium implanted silicon
… bond, which degrades performance of MOS devices. Passivation of these bonds with hydrogen had been found to diminish their effect but the improvement degrades the operation due to hot electron effect. Passivation with deuterium annealing has proven to improve the lifetime of the metal oxide …
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An electrochemical and surface analytical investigation of iron oxidation, passivation and corrosion inhibition
A combined electrochemical and surface analytical study of iron oxidation, passive film formation and corrosion inhibitor interaction is presented. Ultrahigh vacuum surface analysis by Auger electron spectroscopy (AES), low energy electron diffraction (LEED), thermal desorption mass spectrometry …
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Limitation of lithium fluoride (LiF) properties for passivation layer in organic solar cells application
Organic solar cell (OSC) is a low cost renewable energy. Instead of semiconductor silicon solar cell; it is a device that converts the energy of light into electrical energy using photovoltaic effect. Nowadays, global warming and emission of greenhouse effect are the sources of the destruction of …
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Alternative passivation for silicon (100), environmentally benign manufacturing, and cooperative strategy in semiconductor industry
… that the industrial standard, hydrogen passivation of silicon (H-Si) degrades rapidly when exposes to air. In this thesis, two new processing steps are added to make this methoxy passivation compatible to industrial practice. In addition, a preliminary gate oxide test demonstrated that …
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Surface trap passivation and characterization of lead sulfide quantum dots for optical and electrical applications
Quantum dots (QDs) are semiconductor nanocrystals having a size comparable to or smaller than its exciton Bohr radius. The small size of QDs leads to the quantum confinement effects in their electronic structures. Their unique optical properties, including a tunable emission from UV to IR, make QDs …
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