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 34 for “"oxide semiconductors"”.
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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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Metal Oxide Semiconductors for Solar Energy Harvesting
… silicon) used in building the cells. Metal oxide semiconductors are an attractive class of materials that are extremely low cost and can be produced at the scale needed to meet widespread demand. An industrially attractive thin film synthesis process based on aerosol deposition was developed …
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Enhancing light-matter interactions in oxide semiconductors
Oxide semiconductors have been widely utilized because of their unique electronic properties and high stabilities in various environments for solar energy applications. Although oxide semiconductors have shown successful records as an active light-absorbing layer or transport layer in many …
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Synthesis and characterization of metal oxide semiconductors for photoelectrochemical hydrogen production
… thesis is to investigate the properties of metal-oxide thin films on fluorine-doped tin oxide (FTO)-coated glass substrates, prepared by using radio- frequency (RF) reactive magnetron sputtering for photoelectrochemical (PEC) applications. Metal-oxide thin films as a photoelectrode are of special …
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New Forms of Defect Engineering in Silicon and Metal Oxide Semiconductors
… 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 converting sunlight to electrical power. Current methods for …
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Discovery of mechanisms and methods for surface-based defect engineering in oxide semiconductors using liquid water
Semiconducting oxides have been used in a wide range of devices, for example as photocatalysts, optoelectronics, and sensors. It is no surprise that readily-controlled manipulation of defect concentrations in oxides could enable the improvement of material properties for many applications and …
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Deposition of p-type metal oxide semiconductors for large-area electronic display and solar cell applications
… has led to the development of alternative metal oxide technologies. However, whilst very good n-type materials have now been developed, there is still an absence of good p-type materials, which are essential to allow development of the inorganic, non-silicon based p-n junctions and CMOS …
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Chemical vapor sensing with novel coupled-channel field-effect transistors
… This work explores organic and inorganic oxide semiconductors as room-temperature low-cost chemical vapor sensors. Organic semiconductors have well-known chemical vapor sensing capabilities that arise from the grain boundaries and charge transport in their non-crystalline structure. …
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Thin film engineering for transparent thin film transistors
Zinc oxide (ZnO) and Indium Gallium Zinc Oxide (IGZO) thin films are of interest as oxide semiconductors in thin film transistor (TFT) applications, due to visible light transparency, and low deposition temperature. There is particular interest in ZnO and IGZO based transparent TFT devices …
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Surface chemistry to control bulk reaction dynamics of native point defects in rutile titanium dioxide
… and extended defects it contains. For ceramic oxide semiconductor materials, the concentration and diffusion of cations and anions, in the form of interstitials and vacancies, plays a large role in the performance of these materials for gas sensing, photocatalysis, microelectronics and …
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New mechanisms for defect engineering in titanium dioxide
… mechanisms for defect engineering in titanium dioxide based on surface-bulk coupling, photo-stimulation, and interaction of charged defects at the surface. While titanium dioxide is utilized as a model, the principles observed for titanium dioxide will translate well into other metal oxide …
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Plasma Treatment of Zinc Oxide Thin Film and Temperature Sensing Using the Zinc Oxide Thin Film
<p>Zinc oxide is a direct and wide bandgap, II-VI semiconductor. It has large exciton binding energy, large piezoelectric constant, strong luminescence, and high thermal conductivity. These properties make zinc oxide as a suitable material for various optoelectronic applications. Vacuum based …
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Low temperature lithographically patterned metal oxide transistors for large area electronics
Optically transparent, wide bandgap metal oxide semiconductors are a promising candidate for large-area electronics technologies that require lightweight, temperature-sensitive flexible substrates. Because these thin films retain relatively high carrier mobilities even in an amorphous state, metal …
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Defect engineering of polycrystalline titanium dioxide synthesized by atomic layer deposition
… that the properties of semiconducting metal oxides for catalytic and integrated circuit applications can be improved when designed according to the principles of microelectronic devices. Defect engineering is used extensively in the semiconductor processing industry to produce devices with …
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Solar Water Oxidation by Composite Cobalt-Based Catalyst/Oxide Semiconductor Photoanodes
… surfaces was also investigated. Using peroxide as a surrogate substrate revealed that interfacing Co-Pi with W:BiVO4 photoanodes almost completely eliminates losses due to surface electron-hole recombination. The low absolute onset potential achieved with Co-Pi/W:BiVO4 is promising for …
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Visible Light Photocatalytic MoO3-Based Nanomaterials Synthesis, the Effect of Polymer Coatings on Their Photocatalytic Activity and Dissolution, and Their Applications in Water Treatment
… progressively contaminated. Photocatalytic metal oxide semiconductors such as MoO3 have shown much promise in water decontamination as they can generate reactive oxygen species (ROS) that degrade pollutants. MoO3 is an environmentally friendly, low-cost, visible light photocatalyst that has gained …
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Single event upset hardened CMOS combinational logic and clock buffer design
A radiation strike on semiconductor device may lead to charge collection, which may manifest as a wrong logic level causing failure. Soft errors or Single Event Upsets (SEU) caused by radiation strikes are one of the main failure modes in a VLSI circuit. Previous work predicts that soft error rate …
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Reducing Off-State Current in P-Type Metal Oxide Thin Film Transistors
… for flexible thin-film electronics arises. Metal-oxide materials are a prime candidate. They can be fabricated cheaply, in large areas, using the current electronics infrastructure. Some devices are already being produced in industry; however, they typically rely on an NMOS device architecture, …
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Electrical characterisation of emerging photo anodes suited to water dissociation with an applied bias
… industry can be used to fabricate metal oxide semiconductors for use as photoanodes. Given that the protective oxide needs to be transparent to allow light to the photoactive material, two possible solutions are available. To have a thicker transparent conducting oxide, such as …
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