National Research Council of Canada. NRC Institute for Microstructural Sciences
Text, Book Chapter
physics, general; condensed matter physics; optical and electronic materials; surfaces and interfaces, thin films
Raman spectroscopy has shown that porous Si films produced by electrochemical and chemical dissolution of Si contain crystalline Si wires and spherites ~ 3 nm in diameter and/or amorphous Si. The optical absorption and photoluminescence spectra obtained from most of the samples are consistent with the quantum confinement of excitons in Si nanostructures. Other samples composed only of amorphous Si produced a different photoluminescence attributed to the formation of silicon oxyhydride species.