Preparation. Characterization And Photoluminescence Properties Of SiO₂-ZnO Composite Nanofibers

Nanostructure of one-dimensional semiconductor has a wide application prospect in the fields of optics,optoelectronic devices and dielectric.Nano-crystalline of one-dimensional semiconductor has obvious advantages in limitation domain,homogeneous geometry and crystallinity controlled,so it becomes one of the most active fields in the research on semiconductor.One-dimensional nano-semiconductor with different kinds and different morphologies were synthesized,nano-crystalline of one-dimensional semiconductor made great progress on devices.After high temperature calcination,Zinc oxide-silicon dioxide composite comp- onents nanofibers were fabricated by sol-gel process and electrospinning technique, using polyvinylpyrrolidone (PVP Mn=900000) and various of inorganic salts as precursor. This method offered a brand-new way for fabricating one-dimensional inorganic nanomaterial.The procucts were characterized by scanning electron microscope(SEM), X-ray diffraction(XRD),infrared spectra(IR), photoluminescence (PL). All the results show that pure SiO₂-ZnO composite nanofibers with smooth surface, homogeneous diameters of 300-900nm and uniform morphology of the rule of one-dimensional tubular structures were obtained after heat-treated.The study founded that composite fibers were not calcined before showed a stronger defect states light; as the calcination temperature, ultraviolet light-emitting efficiency gradually increased, the defect state luminescence efficiency gradually weakened.