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 13 of 13 for “"Black silicon"”.
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Optical properties of black silicon - an analysis
Silicon is the preeminent solar cell material of the day because it is the first semiconductor that was learned to commercialize and continues to be the principal semiconducting material used in photovoltaic technology for the manufacture of solar cells. Silicon, an indirect band gap semiconducting …
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Black silicon and its applications in photovoltaics and biosensing
Black silicon was produced with a lithography-free three-step plasma etching method. The nanocone forest on the silicon surface makes the silicon look black. Its applications in photovoltaics and biosensing were demonstrated by experiments. For photovoltaics, sub-100 nm nanocone forest was produced …
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Cross-sectional transmission electron microscopy study of femtosecond laser-irradiated selenium-doped 'black' silicon
'Black silicon' refers to silicon that has been treated in a laser-ablation process to incorporate large amounts of chalcogen dopants. The material has been found to have greatly increased absorbance of visible and infared wavelength light in comparison to undoped crystalline silicon. …
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Optimizing wettability of externally wetted microfabricated silicon electrospray thrusters
… performance. The design of microfabricated silicon thrusters and their feed systems requires an understanding of propellant flow over a silicon surface. This research explores the parameters that affect wettability of externally wetted microfabricated silicon electrospray thruster arrays and …
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Laser Processed Materials for Advanced Solar Devices
Crystallized hydrogenated amorphous silicon (a-Si:H) by various methods have been studied for a long time, and among these techniques, excimer laser crystallization has the merits in rapid and stable. In this PhD project, the objective of the excimer laser processing is to develop 1) crystallized …
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Tikslinis fotovoltinių silicio prietaisų savybių keitimas, panaudojant gilų paviršiaus tekstūrinimą ir dvimatės medžiagos dangas /
This thesis presents methods for silicon surface modification using metal-assisted chemical etching and CVD grown two-dimensional material coatings. The modifications were performed with photovoltaic devices in mind. Single-step copper-assisted chemical etching was used to texture the silicon …
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Performance and analysis of the plasma bipolar junction transistor: Control of the surface electrical properties
… the resultant transistor behavior. A PBJT with a black silicon interface was designed and characterized. The application of the black silicon PBJT as a burst mode digital transistor was demonstrated experimentally.
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Development of microcantilever mid-infrared detectors and sources and their application in infrared spectroscopy
… mismatch to find the cantilever displacement. Silicon nitride-aluminum bimaterial cantilevers are designed, fabricated, and tested for validating the developed model. The custom-fabricated cantilevers show 9X or 190X improvements in IR detection sensitivity compared to commercial cantilevers. …
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Silicon nano-structure fabrication and application for surface-enhanced Raman spectroscopy
We demonstrated fabrication of black silicon with slanted nano-pillar array on both planar and 3D micro- and mesoscale structures produced by a high-throughput lithography-free oblique-angle plasma etching process. Nano-pillars with gradual change in height were created on the same piece of …
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Silicon wafer integration of ion electrospray thrusters
… rapidly accelerating trend is a fully integrated silicon wafer satellite. Such a large surface area to volume ratio, however, both necessitates propulsion capability and renders other mechanisms of control unfeasible due to their respective form factors. While development of electrospray thrusters …
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High-throughput plasma nanomanufacturing and its applications
… dissertation, I demonstrated a high-efficiency black silicon solar cell with nanotextured non-reflective surface, which significantly improved the light-trapping effect of conventional microtextured solar cells by wet chemical processes. Based on the SPERISE nanomanufacturing, a nanostructured …
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A fully microfabricated two-dimensional electrospray array with applications to space propulsion
… an array with tens of thousands of emitters. Silicon batch microfabrication has been used, as it is well suited for making large arrays of emitters. The thruster is made using Deep Reactive Ion Etching (DRIE) and wafer bonding techniques, in a six mask process, and comprises two components. …
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Physical characteristics of laser processed hydrogenated amorphous silicon
Hydrogenated amorphous silicon films subjected to KrF excimer laser irradiation with a profiled beam in air leads to the formation of microstructures. The main objective of this research was to perform a comprehensive study in understanding this material in three different aspects: thermal, …