直接掺杂与原位合成的ZnS/PPV纳米复合纤维的制备和光电性能研究
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摘要
纳米科学被誉为21世纪的三大科学之一。伴随着纳米科学的迅速发展,纳米材料走上了历史的舞台并且大放异彩。而社会的进步需要越来越多具有各种优异性能材料,这种强大的需求促进了纳米复合材料的发展。无机-有机纳米复合材料兼有无机、有机、纳米材料三种特性,在光、电、磁等方面都有突出的性质,可以应用到军事、医疗、生化、食品、建筑等多个领域。而将静电纺丝技术应用到纳米复合材料的制备中,研制一维的纳米复合材料更是现在研究的热点。PPV是具有光伏转换、电致发光、光致发光和光学非线性等光电特性的共轭聚合物,并作为空穴传输材料在有机光电子器件中有广泛的应用。ZnS是Ⅱ-Ⅵ族重要的半导体材料,具有红外透明性和很好的光电性能,ZnS作为宽禁带的n型半导体材料,在电致发光器件中也已经被广泛应用。
本文中,我们分别通过共混、原位合成与静电纺丝相结合的二种方法研制了ZnS/PPV纳米复合纤维。XRD和TEM结果显示两种方法均成功的掺入了ZnS纳米粒子,但是原位合成法中粒子的分散更均匀,而共混法制备的纳米复合纤维直径要明显比原位合成法要细。PL检测发现两种方法制备的纳米复合纤维和纯PPV相比,均发生了蓝移现象。将原位合成的单根ZnS/PPV纳米复合纤维采用“Organic Ribbon Mask”技术制成器件,在5.76mW/cm2的光照下检测纤维的光电性质,结果表明复合纤维具有很好的光电响应。
静电纺丝的设备简单,成本低。而ZnS/PPV纳米复合纤维有很好的光学性能和光电性质。用静电纺丝法制备的ZnS/PPV纳米复合纤维在光电子器件中有潜在的应用前景。
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 importantⅡ-Ⅵsemiconductor 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.
本文中,我们分别通过共混、原位合成与静电纺丝相结合的二种方法研制了ZnS/PPV纳米复合纤维。XRD和TEM结果显示两种方法均成功的掺入了ZnS纳米粒子,但是原位合成法中粒子的分散更均匀,而共混法制备的纳米复合纤维直径要明显比原位合成法要细。PL检测发现两种方法制备的纳米复合纤维和纯PPV相比,均发生了蓝移现象。将原位合成的单根ZnS/PPV纳米复合纤维采用“Organic Ribbon Mask”技术制成器件,在5.76mW/cm2的光照下检测纤维的光电性质,结果表明复合纤维具有很好的光电响应。
静电纺丝的设备简单,成本低。而ZnS/PPV纳米复合纤维有很好的光学性能和光电性质。用静电纺丝法制备的ZnS/PPV纳米复合纤维在光电子器件中有潜在的应用前景。
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 importantⅡ-Ⅵsemiconductor 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.
引文
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