Optical Studies on Some Aspects of Polyvinyl Alcohol Composite Zns Nanocrystalline Thin Films

摘要

Zinc Sulfide (ZnS) nanoparticles were grown into the polyvinyl alcohol (PVA) matrix and were synthesized at 70°C by chemical route. The particle size and surface morphology were analysed by X-ray diffraction (XRD), High Resolution Transmission Electron Microscopy (HRTEM) and Scanning Electron Microscopy (SEM). Optical absorption spectrum showed strong blue shift, which is an indication of strong quantum confinement. Photoluminescence spectrum shows the blue luminescence peaks, which can be attributed to the recombination of the defect states.