The features of the photoluminescence and the manifestation of thermally stimulated and tunneling luminescence due to the separation of nonequilibrium charge carriers between the photoexcited silicon core of a nanocrystallite and its peripheral layers of SiOx and SiO2 are investigated for different forms of nanostructured silicon. A model is proposed wherein a “two-stroke charge piston” acts in turn on the electron and hole components by means of an Auger process which occurs under restricted volume conditions and brings about a spatial separation of the charge carriers.