Preparation Of Directly Doped And In Situ ZnS/PPV Composite Nanofibers And Study On Their Photo-electric Properties

Nanoscience is one of the three great sciences in the 21st century. With the rapid development of nanoscience,nanomaterials go onto the stage of history and greatly shine. More and more new materials with a variety of excellent performance are required with the progress of the society, this strong demand of materials promotes the development of composite nanomaterials. Inorganic-organic composite nanomaterials have the excellent properties of inorganic,organic and nano-materials,therefore they can be applied to military,medical,biochemical,food,architectural and other fields. Now the application of electrostatic spinning technology in preparing 1D composite nanomaterials is a hot research. Poly(phenylene vinylene) (PPV) is a kind of typical conjugated polymers with excellent properties, such as photovoltage(PV), electroluminescence(EL), photoluminesc ence(PL) and non-linear optical properties. As a kind of hole transport material, PPV has wide range of applications in organic optoelectronic devices. ZnS with the infrared transparence and good optical properties is one of the importantâ…¡-â…¥semiconductor materials.As a wide band gap n-type semiconductor material. ZnS has been greatly applied in electroluminescent devices.In this paper,we prepared ZnS /PPV composite nanofibers by the coupling of the directly doped (and in situ) method and electrospinning technique. XRD and TEM results showed that ZnS nanoparticles were successfully doped in the composite nanofibers by both directly doped and in situ methods, ZnS nanoparticles were more uniformly dispersed in the composite nanofibers prepared by the in situ method, but the diameter of the composite nanofibers prepared by the directly doped method was significantly smaller. PL spectra of the composite nanofibers prepared by the two methods were both blue-shifted. The novel''Organic Ribbon Mask''technique of Professor Hu's group was used to construct the Au top-electrode device of a single composite fiber prepared by the in situ method. The photo-electric character measured under 5.76mW/cm2 light illumination indicated that PPV/ZnS composite nanofiber had good photo-electric respond.Electrospinning is a low-cost technology and the equipmen of which is simple. ZnS /PPV composite nanofibers have excellent optical and photo-electric properties. ZnS /PPV composite nanofibers prepared by the electrostatic spinning method have potential applications in photo-electric devices.