Photoluminescence in nanosized silicon synthesized by laser chemical vapor deposition

The photoluminescence of nanosized silicon synthesized by laser chemical vapor deposition has been studied. With the excitation light of 300-450nm, a wide photoluminescence was observed between the wavelength of 400-650nm. The nanosized silicon with the diameter larger than 10nm presents photoluminescence at room temperature was found. The quantum confinement/luminescence centers model can be used to interpret the experimental phenomena qualitatively.