Preparation and Optical Properties of Wavelength Modifying Semiconducting Nanoparticles (CdS, CdSe, ZnS, ZnS:Mn~(2+)

摘要

Nanoparticles of CdS, CdSe, ZnS and ZnS:Mn~(2+) were synthesized by thermal treatment using autoclave method 'using sodium oleale as effective stabilizers. Photo-luminescence of the synthesized nanoparticles showed wavelength modification into visible region when excited at UV light. The lifetime of a film such as PVA and LDPE is reduced by a degradation of the double bonds of C=O and C=C in the polyolefin films by ultraviolet (UV). As a result, the physical, properties of the films are changed. This is suppressed by doping wavelength, modifying nanoparticles into the films to absorb UV light which-gives damage mi films. Absorption, fluorescence, X-ray diffraction and transmission electron microscopy were employed for the characterization.