Photoluminescence Spectroscopy in Nanocrystallinesillcon-Silicon Dioxide Super Lattices

In the present paper, a strong interest in the optical properties of Si nanocrystals has been stimulated, at high-efficiency, room-temperature photoluminescence (PL) in porous Si, and by the PL origin. The main aim of this research paper is to compare PL properties in nc-Si/a-SiO2 super lattices with similar data obtained in other materials containing Si nanocrystals (porous Si, Si nanocrystals prepared by CVD, ion implantation, etc.), and a correlation has been established between Si nanocrystal structure (i.e., size, shape and crystallographic orientation) and light-emitting properties.