PVA/PVP/PEG polymeric blend loaded with nano-Zn0.75-xFexCd0.25S: effect of iron concentration on the optical characteristics

초록

Poly(vinyl alcohol)/poly(ethylene glycol)/polyvinyl pyrrolidone blend loaded with nano-(Zn0.75-xFexCd0.25S) was formed by thermolysis and casting procedures. Rietveld analysis confirmed the formation of a solid solution Zn0.75-xFexCd0.25S with a single zinc blende phase of cubic structure. Upon doping with iron (Fe) ions, the cell parameter increased slightly while the crystallite size decreased. X-ray diffraction evidenced the possible formation of cross-linking between different polymers in the blend by the variation in the characteristic diffraction peaks positions of the constituent polymers upon forming blends. From the analysis of ultraviolet-visible (UV-Vis) spectra, all samples exhibited a normal dispersion. The absorbance, extinction coefficient, refractive index, dielectric constant, optical conductivity and nonlinear optical parameters of the nanofiller-loaded blend have the highest value compared with the other blends when the Fe content is 10%. The emitted fluorescence (FL) intensity and colors depended on the amount of Fe in the nanofiller. The blend with 15% Fe has the highest FL intensity as compared with other blends.

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