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 9 of 9 for “"nanocrystalline silicon"”.
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Light element analysis in amorphous and nanocrystalline silicon using ERDA and related techniques
… of light elements incorporated in the amorphous silicon network of hydrogenated and nanocrystalline silicon were analysed by using ion beam analytical techniques. To do this, amorphous silicon films were deposited by hot wire chemical vapour deposition, and a unique sampling method was developed …
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Hot-wire chemical vapour deposition of nanocrystalline silicon and silicon nitride : growth mechanisms and filament stability
Nanocrystalline silicon (nc-Si:H) is an interesting type of silicon with superior electrical properties that are more stable compared to amorphous silicon (a-Si:H). Silicon nitride (SiNₓ) thin films are currently the dielectric widely applied in the microelectronics industry and are also effective …
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A study of hydrogenated nanocrystalline silicon thin films deposited by hot-wire chemical vapour deposition (HWCVD)
In this thesis, intrinsic hydrogenated nanocrystalline silicon thin films for solar cells application have been deposited by means of the hot – wire chemical vapour deposition (HWCVD) technique and have been characterised for their performance. It is noticed that hydrogenated nanocrystalline …
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Microstructural Modification in Nanocrystalline Silicon Due to Selective Charge Injection: A Current-sensing Atomic Force Microscopy Study
<p>The ability to deposit hydrogenated nanocrystalline silicon (nc-Si:H) on low-cost, flexible substrates over large areas makes it an attractive option for large scale production of solar cells. Nc-Si:H has also shown promise as a replacement for amorphous silicon in thin film transistors in large …
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Control of Thin-Film Silicon Microstructure With Low-Energy Particle Bombardment in Reactive Sputtering
… the growth chamber to promote a phase change to nanocrystalline silicon at moderate growth temperatures. The growth flux with hydrogen includes energetic (∼100eV) neutral H, produced by the reflection of H2+ions from the target. We determine the kinetic role of these fast H neutrals in the …
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Electrical characterisation of simple a-Si:H and nc-Si devices on paper substrates deposited by hot wire chemical vapour deposition and printing techniques
… transport properties of two classes of silicon: hydrogenated amorphous silicon (a-Si:H) obtained by hot wire chemical vapour deposition (HWCVD), and printed nanocrystalline silicon (nc-Si), both deposited on a flexible, lightweight substrate of 80 g m-2 wood-free paper. For different …
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Biologically-templated metal oxide and metal nanostructures for photovoltaic applications
… We applied the process to the synthesis of silicon nanostructures for use as semiconductors or photoactive materials. As starting materials, we obtained diatomaceous earth, a natural source of biotemplated silica, and we also mineralized M13 bacteriophages with silica to produce porous …
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Laser Surface Texturing, Crystallization and Scribing of Thin Films in Solar Cell Applications
… reduced cost compared with bulk crystalline silicon. However, their overall efficiency and stability are less than that of their bulk crystalline counterpart. The work presented in this thesis seeks to investigate these issues via a series of experimental and numerical analysis of the …
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Direct measure of band edge optical absorption of silicon nanostructures using photothermal deflection spectroscopy
Quantum confined silicon nanoparticles (Si-NPs) are a promising material for optoelectronic applications. In this thesis, I studied the band edge optical absorption of free standing Si-NPs and Si-NPs in an amorphous silicon matrix, a composite material also known as nano-crystalline silicon …