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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 49 for “"passivation layer"”.
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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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Limitation of lithium fluoride (LiF) properties for passivation layer in organic solar cells application
… by the evaporation of organic solar cell layers. This method seems impractical in the large�scale production because the vacuum step requires large power supply. The solar cell preparation using spin coating techniques are the most compatible. As a conclusion, Lithium Fluoride (LiF) …
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A molecular dynamics study of the tribological properties of diamond like carbon
… on both the structure of the DLC as well as the passivation layer that forms on the sliding counterfaces under different environmental conditions, and that when optimizing for the lowest COF the best structure for the DLC depends on the type of passivation layer. We also find that, by preventing …
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Silver-magnesium thin film interactions in an oxidzing ambient
… an adhesion promoter to improve adherence, and a passivation layer to protect the silver against corrosion. Ag(200 nm)/Mg(50 nm) bilayer structure on SiO2 substrates were annealed at temperatures ranging from 300-650°C and times from 30-120 min in a flowing Ar ambient. Upon annealing the Mg …
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High mobility germanium MOSFETs : study of ozone surface passivation and n-type Dopant channel implants combined with ALD dielectrics
… MOSFETs. First, the formation of an interfacial passivation layer via in-situ ozone oxidation is explored. Long channel Ge p- and n-MOSFETs are fabricated with A12 0 3 and HfO2 gate dielectrics deposited by atomic layer deposition (ALD). The ozone surface passivation is observed to result in …
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Amorphe Siliziumoxidschichten zur Oberflächenpassivierung und Kontaktierung von Heterostruktur-Solarzellen aus amorphem und kristallinem Silizium
Atomic hydrogen plays a dominant role in the passivation of crystalline silicon surfaces by layers of amorphous silicon. In order to research into this role, this thesis presents the method of hydrogen effusion from thin amorphous films of silicon (a-Si:H) and silicon oxide (a-SiOx:H). The oxygen …
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Transistor arrays for the direct interfacing with electrogenic cells
… part of the process, including the interconnect layer and the passivation layer protecting the devices from an electrolyte solution, was developed during these studies. To be compatible to the PECVD tool depositing the passivation layer, the interconnect layer was made out of polysilicon. To …
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Technology and characterization of GaN-based heterostructure field effect transistors (HFETs)
… power amplifier devices. A common feature of the layer structure of such transistors is a GaN buffer which is usually deposited on non-native substrates, e.g. sapphire, silicon or SiC. A subsequent ternary barrier layer, such as AlGaN or AlInN, allows the realization of a so-called two-dimensional …
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Passivation of GaAs surfaces and fabrication of self-assembled In(Ga)As/GaAs quantum ring structures
… concentrates on two topics: (i) GaAs surface passivation methods using different materials and (ii) formation of InAs islands on GaAs and transformation of InAs islands into quantum rings (QRs). All the samples are fabricated by metalorganic vapor phase epitaxy and characterized by optical …
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Design and fabrication of the microcantilever heater for rapid chemical vapor deposition graphene synthesis
… contact between the doped silicon device layer and the patterned catalytic metal, 200 nm of PECVD silicon nitride is deposited as a passivation layer. Raman spectroscopy measurements show that the temperature along the heater region is uniform with less than 5 % in difference. With rapid …
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Reliability of copper interconnects in integrated circuits
… the interface between the copper and the top passivation layer (usually Si3N4). One of the predominant failure mechanisms in Cu has been open-circuit failure due to electromigration-induced void nucleation and growth near the cathode ends of interconnect segments. However, results from …
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Effect of a Simulated Butterfly Valve on the Erosion-Corrosion Rate of Nickel Aluminum Bronze Alloys in Highly Turbulent Seawater
… interface produced pitting sites. The average passivation layer thickness is also measured.
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CORROSION RESISTANCE PERFORMANCE INVESTIGATION OF MILD STEEL BAR COATED WITH MAGNESIUM PHOSPHATE CEMENT PASTE
… and the formation of an iron (III) phosphate passivation layer between the substrate steel and the MKPC paste coating.</p> <p>The studies presented in this work show that the MKPC coating system is technically feasible in delaying the level of corrosion for mild steel bars in a 3.5 wt.% NaCl …
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Solving Series Resistance Problems In GaSb Thermophotovoltaics with Graphene and Other Approaches
… measured short circuit current. An additional layer of metal was added to the reduce the deleterious resistance characteristics, and it was found to lower the series resistance down to a 4 Ω average across almost all of the devices. The average JSC for all of these devices increased to over 30 …
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Influence of SiNx/Si interface states on Si solar cells
… was investigated, where SiN_x is used as a passivation layer. Significant shifts in capacitance, conductance and leakage current characteristics were observed for metal/SiN:H/n^+-Si MOS capacitor when it was subjected to a constant voltage stress (CVS) of +10V at room temperature. The …
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Embedded Passivated-electrode Insulator-based Dielectrophoresis
… the microfluidic channel covered by a thin passivation layer of only 4 μm. The channel was designed with two nonaligned vertical columns of insulated microposts (200 μm diameter, 50 μm spacing) located between the electrodes (600 μm wide, 600 μm horizontal spacing) to generate the nonuniform …
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A multi-process reactor for thin film transistor fabrication at low temperatures
… has been designed to produce device quality layers on Coming 1733 glass substrates, which are incompatible with standard high temperature processing techniques. A variety of processes can be performed sequentially in the system without removal of the substrates from vacuum. This integrated …
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Designing Planar Silicon Solar Cells for Singlet Fission Sensitization
… (Tc) and a zinc phthalocyanine (ZnPc) donor layer can boost photocurrent and external quantum efficiency (EQE). Planar devices are simpler to fabricate than microwire devices and reproduce the planar geometry of optical test samples to connect studies of the interface to device performance. …
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Chalcogenide Glass on Layered van der Waals Crystals for Integrated Photonic Devices
Layered van der Waals (vdW) materials have demonstrated huge potential for photonic devices with their varied and tunable optical properties. They can be integrated into planar photonic devices on virtually any substrate due to their van der Waals bonding, thereby introducing desirable material …
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Development of Anti-corrosive Polyester Powder Coatings
… functional filler, namely zinc phosphate with passivation effect, zinc powder with sacrificial anode effect, and two nanoclays with barrier effect were incorporated into the coatings to enhance the anti-corrosive performance. The anti-corrosive properties were evaluated by electrochemical …
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