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The Optical Characteristics of CdS Thin Films and Powders  

Chang, Ki-Seog (Korea Air Force Academy)
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Korean Journal of Crystallography / v.19, no.1, 2008 , pp. 25-30 More about this Journal
Abstract
In order to characterize the optical properties of CdS thin films and CdS powders, the following experiments were performed: CdS wurtzite thin films were made using 99.99% CdS (Aldrich) powder and the $AlO_x$ membranes in $7{\times}10^{-6}$ torr(here, the average vacuum coating speed is $1{\AA}/sec$.). The surface states of CdS nano-particles with dimensions of 3.87 nm were studied through the fluorescence spectroscopy. From the resulting spectra exhibited, we can see a sharp fluorescence at 451 nm arising from the excitons on the CdS thin films, compared with the 448nm peak of the CdS powders.
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