1. Highlight the properties changes resulting from the quantum confinement effect of CdS/CdSe embeded in thin films of phosphor aluminosilicate matrix;

2. Evaluation of the increased surface-to-volume ratio of the CdS/CdSe quantum dots on the properties of nanocomposite thin films based on phosphor aluminosilicate matrix;

3. Establishment of the mechanisms that govern the properties of CdS/CdSe quantum dots embeded in thin films due to the phosphor aluminosilicate matrix composition;

4. Assesment of sol gel method to synthesize thin films of CdS/CdSe embeded in phosphor aluminosilicate matrix as a promising new temperature sensing material.

The tasks: (i) synthesis of thin films nanocomposites CdSe (ZnS) embedded in phosphor aluminosilicate matrix; (ii) synthesis of thin films nanocomposites CdS (ZnS) embedded in phosphor aluminosilicate matrix; (iii) investigation of the photoluminescence dependency on the change of SiO₂, P₂O₅ and Al₂O₃ matrix composition; (iv) exploration of the luminescence features on the type of silica, phosphorous pentoxide and alumina precursors; (v) study of emission peak wavelength, full width at half maximum, emission intensity and energy bandgap dependence with respect to temperature; (vi) investigation of bandgap change upon thin films thickness modification; (vii) analysis of the nanocomposite stability (wavelength shift) under thermal cycling (cool down and temperature raising); (viii) optical and structural characterization (UV-Vis-NIR, photoluminescence, FourierTransform Infrared-FTIR and Raman spectroscopy, XRD analysis, THz spectroscopy) of the nanocomposites in correlation with their tunable size; (ix) study of the thin films microstructure by atomic force microscopy (AFM), transmission and scanning electron microscopy (TEM and SEM); (x) study the temperature dependence of photoluminescence emission using an appropriate experimental set up.

• < Prev
• Next >