Optical quality PMMA thin film layers including different concentrations of 3nm CdSe/ZnS and 5 nm TiO2
semiconductor quantum dots have been made by spin coating method. Their optical properties show evident
consequences of the confinement effects with wavelength bandgap shifting for both types of QDs. The confinement
effects are more pronounced for CdSe/ZnS QDs than for TiO2 QDs. Layers including CdSe/ZnS QDs exhibit a strong
luminescent behavior centred on 560nm with a stock-shift in front of the first exciton absorption peak.
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