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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: 2009 6th International Conference On Electrical Engineering, Computing Science And Automatic Control, Cce 2009 Título del capítulo: Deposition of nanocrystalline-silicon by Cat-CVD method and its characterization
Silicon and its related alloys deposited by catalytic chemical vapor deposition (Cat-CVD), takes place upon thermo-catalytic decomposition of the reactant gases, i.e. silane (SiH4) and hydrogen (H2), at the surface of a hot filament. Tantalum (Ta) has been used as catalyst which resulted with better controllability from amorphous to crystalline-phase transition. Process for depositing hydrogenated nanocrystalline silicon (nc-Si:H) embedded in hydrogenated amorphous silicon oxide (a-Si:O:H) matrix, as a function of both, Ta-catalyst, and substrate-temperatures are reported. The deposited samples were characterized by X-ray diffraction and micro-Raman spectroscopy. Crystalline sizes were determined using a Sherrer's formula and Raman spectra for its size-related tendencies. As preliminary results, the range of crystallite formation starts at the catalyst temperature of 1700 - 1750°C.
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ISBN: 9781424446896 Editorial: IEEE Computer Society