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New observation on the luminescence of CdS clusters in zeolite-Y

✍ Scribed by W. Chen; Z.G. Wang; Z.J. Lin; L.Y. Lin

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
540 KB
Volume
101
Category
Article
ISSN
0038-1098

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✦ Synopsis

The excitation spectrum of CdS clusters in zeolite-Y is consistent with their absorption spectrum, both showing two absorption bands that are assigned to the Is-1s and ls-lp transitions, respectively. A new emission at 400 mn is considered to be the recombination of the bounded excitons. The emission firstly increases then decreases with increasing cluster size or loading. The emission by excitation into the Is-1s band is stronger and sharper than that by excitation into the ls-lp band. This phenomenon is attributed to the size inhomogeneity and the strong electron-phonon interaction of the clusters.

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