The role of surface vibrations and quantum confinement effect to the optical properties of very thin nanocrystalline silicon films
Date
2007Author
Lioudakis, Emmanouil E.Antoniou, Antreas
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Nassiopoulou, Androula Galiouna
Lioutas, Ch B.
Frangis, N.
ISSN
0021-8979Source
Journal of Applied PhysicsVolume
102Issue
8Pages
83534-83534Google Scholar check
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We report on a spectroscopic study of very thin nanocrystalline silicon films varying between 5 and 30 nm. The role of quantum confinement effect and surface passivation of nanograins in optical properties are examined in detail. The coupling between surface vibrations and fundamental gap E-g as well as the increase of interaction between them at the strong confinement regime (<= 2 nm) are proposed for the observable pinning of E-g in luminescence measurements. (C) 2007 American Institute of Physics.