Electrical properties of silicon oxide nanocomposites of porous silicon

The impedance spectra of silicon oxide nanocomposites of porous silicon is investigated in 25 Hz - 1 MHz frequency range. The different dispersion of electrical capacity in different frequency bands and complex relaxation processes that affect the electric transport properties of nanocomposites were revealed. Based on the analysis of spectra of thermal stimulated depolarization it was shown that oxidation of the surface of porous silicon nanocrystals gives rise to changing the density of states in different energy ranges.