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TitleStructural and optical studies of CdS nanocrystals embedded in silicon dioxide films
Author(s)Rolo, Anabela G.
Conde, O.
Gomes, M. J. M.
KeywordsCdS-doped glass films
II–VI semiconductor
Quantum dots
Optical absorption
Issue date15-Apr-1998
JournalThin Solid Films
Abstract(s)Silicon dioxide films doped with nanocrystallites of CdS with a mean radius value in the range of 20 to 40 A° have been grown using the magnetron rf-sputtering technique. We have studied the combined effects of rf-power deposition, the number of semiconductor chips on the SiO2 target, and post-annealing temperature on the CdS crystal size. The optical transmission spectra display a marked blue shift of the absorption band edge of up to 400 meV which was attributed to quantum size confinement effects. The luminescence spectra show a narrow emission peak tentatively explained as being due to the recombination of electrons on shallow donor levels with confined valence band holes.
DescriptionThe authors would like to thank Prof. M.I. Vasilevskiy and Prof. M.S. Belsley for helpful discussions.
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:CDF - FMNC - Artigos/Papers (with refereeing)

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