Optical Properties Of Hybrid Composites BasedOn Highly Luminescent CdS and ZnSNanocrystals In Different Polymer Matrices

摘要

The luminescent CdS and ZnS nanocystals embedded in different polymer matrices like poly-vinyl alcohol (PVA), poly-vinyl pyridine (PVP) polymer matrices have been prepared by simple wet chemical precipitation method. The thin films of nanocomposites are deposited on glass substrate by spin-coating. The optical absorption spectra show a clear blue shift in absorption edge, such that the band gap calculated from the absorption spectra are higher than those calculated for the bulk. Photoluminescence spectra show defect related emission at different wavelength in visible range