Structural investigations of Si films prepared by laser-assisted deposition
indicate that the strong visible photoluminescence can be related to the p
resence of crystalline cubic Si (c-Si) inclusions in an amorphous media wit
h smooth surface morphology. The PL characteristics are determined by the s
pecific short-range arrangement of Si atoms in the amorphous media and by t
he size and the density of the embedded c-Si crystallites. (C) 2000 Elsevie
r Science Ltd. All rights reserved.