Abstract
A new type of hydro-fluorinated amorphous silicon-carbide (a-SiC:F:H) film was produced by the glow-discharge decomposition of intermediate-species SiF2, H2 and CF4 gas mixture or SiF2, H2 and CH4 gas mixture. Boron and phosphorus were added to this a-SiC:F:H by mixing B2H6 and PH3 with the gas mixtures. The optical, structural and electrical properties of the a-SiC:F:H films were studied experimentally, and it was found that the optical band gap of a-SiC:F:H can be increased up to 2.2 eV by increasing the carbon content without apparent degradation of film properties such as the photo-conductivity or photo-sensitivity, and also that the conductivity of impurity-doped a-SiC:F:H can be increased above that of the similar hydrogenated amorphous silicon-carbide (a-SiC:H) produced from a CH4 and SiH4 gas mixture.
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