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Showing 1 to 18 of 18 for “"metallisation"”.
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PRINTED METALLISATION OF PHOSPHORUS DOPED SILICON SURFACES FOR SOLAR CELL APPLICATIONS
… the development and characterization of printed metallisation methods for high-efficiency silicon wafer solar cells. Metallisation of phosphorus doped surfaces using screen-printed silver (Ag) pastes is a well-established process. However, its performance is limited by several fundamental …
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The control of metal-NiNGaAs and NiNAlAs interfaces by cryogenic processing.
… (TEM).The results presented show that In metallisation of In[0.53]Ga[0.47]As(100) at room temperature results in a predominantly three dimensional mode of growth, accompanied by the out-diffusion of As. Low temperature (125K) metallisation appears to reduce clustering and inhibit As …
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Contact resistance study on polycrystalline silicon thin-film solar cells on glass
… focus of the Group’s work is now moving to the metallisation of evaporated solar cells. Minimising various kinds of losses is the main challenge of the cell metallisation procedure, within which the contact resistance is always a big issue. In this thesis, the contact resistance of aluminium …
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Solid-State NMR of Metallic and Paramagnetic Systems
… catalytically hydrogenated VO2, electrochemical metallisation is shown to be associated with hydrogen intercalation, and the presence of metallic and paramagnetic phases is explored with 1H, 2H, 17O and 51V NMR. By selectively deuterating the ionic liquid electrolyte, hydrogenation is then shown …
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Electrodeposited Ni/Ge and germanide schottky barriers for nanoelectronics applications
… Schottky barrier fabrication. This low energy metallisation technique offers numerous advantages over the physical vapour deposition techniques. Electrical characteristics of the grown diodes show a high quality rectifying behaviour with extremely low leakage currents even on highly doped Ge. A …
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The development of nanoporous metal membranes for analytical separartions
… template onto the target substrate prior to metallisation. Metal is then deposited through PIED into the interstitial spaces of the, subsequently removed, microsphere template and directly onto the TiO2 sensitised substrate surface. The dimensions of the resultant pores in the deposited metal …
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Structural and Magnetic Phases in Pressure-Tuned Quantum Materials
… antiferromagnetic order in FePS3 through this metallisation is studied for the first time. In contradiction to previous indirect measurements, it is seen that magnetism persists into the metallic phase, with long range antiferromagnetism giving way to a previously unobserved short-range order. …
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Electron-beam evaporated polycrystalline silicon thin-film solar cells: paths to better performance
… sample wrinkling, contamination protection, metallisation of planar cells and textured cells, etc. The second part is a systematic study on light trapping, a very critical issue for thin-film silicon solar cells. It is found that glass texturing is hardly compatible with evaporated cells due …
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Selective Reduction of Laterite Ore
… to 70 vol% significantly increased iron metallisation (> 50%). Gas flow rate above 700 mL/min had a minor effect on the ore reduction. Effect of the ore size on reduction of metal oxides was also insignificant. Optimal conditions for selective reduction of laterite ore included …
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Growth and Characterisation studies of MgO and Mg silicate dielectric layers on Si and InP surfaces
… MOS devices were fabricated using an optimised metallisation procedure, called the FUSI process. Electrical characterisation of FUSI devices show low (< 1012 cm-2) interfacial state densities, and allowed the dielectric constant of MgO (~10) to be calculated. Transmission electron microscopy …
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Pressure Tuned Magnetism in d- and f-Electron Materials
… NiPS$_3$. Concurrent work on FePS$_3$ has shown metallisation under pressure. It seems reasonable to speculate that NiPS$_3$ may also metallise at higher pressure. The energy gap is narrowed in both materials as pressure is increased. Magnetisation measurements have revealed a low temperature …
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Design and feasibility evaluation of low-cost 3D printing of Horn Antennas
… that the fabrication of antennas using AM and metallisation techniques is realisable. One of the objectives of this study has been to design, fabricate and test the performance of lowcost 3D printed antennas to determine their feasibility. To achieve this, a commercial X-band pyramidal horn has …
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Thermal characterisation of miniature hotplates used in gas sensing technology
… micro-heater, fabricated using tungsten metallisation. There is a commercial drive to include MEMS micro-heaters in portable electronic applications including gas sensors and miniaturised IR spectrometers where low power consumption is required. IR thermal microscopy was used to thermally …
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Thermomechanical Stress in Solar Cells and Modules: A Finite Element Modelling and Experimental Investigation
… cells and deepens the understanding of how cell metallisation can potentially affect the durability of modules.
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Pulsed Laser Dielectric Ablation for Copper-plated Silicon Solar Cells
Copper-plated metallisation can act as an alternative to the dominant Ag screen-printing with a reduced material cost for Si solar cell manufacturing. However, concerns of laser-induced damage with carrier recombination and plated metal adhesion have contributed to a low market fraction of …
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S-Schichtproteine als molekulare Bausteine zur Funktionalisierung mikroelektronischer Sensorstrukturen
… clusters are introduced. Different ways for the metallisation of S-layers are described. One example for this is a new method of negative staining of crystallised S-layers for the transmission electron microscopy, where the S-layers, adsorbed and activated with metal complexes, are exposed to UV …
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Methods for the development of a DNA based nanoelectronics
The exceptional self-assembly properties of DNA as well as its ability to interact with different kinds of chemical compounds and biological structures make this biomolecule to an interesting object for the fabrication of artificial nanostructures. In this work several methods for a DNA-based …
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Growth of Platinum Clusters in Solution and on Biopolymers: The Microscopic Mechanisms
Thema der vorgelegten Dissertation ist der Mechanismus der Keimbildung und des Wachstums von Platinclustern in Lösung und auf Biopolymeren nach der Reduktion von Platin-Salzen. Die Untersuchung wird auf atomarer Skala durch ab-initio Molekulardynamik mit der Methode von Car und Parrinello …