Abstract:
Experimental data on ion synthesis of nanocomposite layers with carbon-rich clusters and silicon nanocrystals by irradiation of nonstoichiometric silicon oxide (SiO$_x$) films with carbon ions followed by high-temperature annealing are reported. It is shown that, at rather high doses of C$^+$ ions, the resulting films exhibit photoluminescence with a spectrum that encompass the entire visible and near-infrared regions. The formation of carbon-rich clusters and silicon nanocrystals is confirmed by X-ray photoelectron spectroscopy data. The distribution of carbon practically reproduces the calculated profile of ion ranges, suggesting that there is no noticeable diffusive redistribution of carbon. A qualitative model of the layered structure of ion-synthesized structures is suggested.