Thin Solid Films, Vol.255, No.1-2, 92-95, 1995
On the Possible Origin of the Photoluminescence from Oxidized Nanocrystalline Silicon
We report that the green-blue photoluminescence in nanocrystalline silicon films prepared by plasma chemical vapour deposition and post-oxidation is generated and enhanced through exposure to air or water immersion followed by heat treatment. It is shown that the origin of the luminescence is due to the presence of hydroxyl groups adsorbed on structural defects in the SiO2 network.