Abstract
The optoelectronic and structural properties of p-type a-SiO x :H films have been studied. The deposition parameters e.g. chamber pressure and diborane to silane ratio are optimized to get a film with dark conductivity ( σ d) 7.9×10 −6 S cm −1 and photoconductivity 9.3×10 −6 S cm −1 for an optical gap ( E 04) of 1.94 eV. The decrease of optical gap accompanied by the increase of conductivity is due to less oxygen incorporation in the film, which is substantiated by the decrease of the intensity of SiO absorption spectra. The properties are very much effected by the chamber pressure and diborane to silane ratio.
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