银纳米线的聚醇法制备及其在聚酯和玻璃基板上镀成的透明导电薄膜对比

以聚乙烯基吡咯烷酮(PVP)为稳定剂,聚乙二醇(EG)为还原剂,采用聚醇法1]制备了银纳米线.根据硝酸银/PVP比例的不同制备了4种类型的银纳米线样品,其中样品D直径最均匀,杂质含量最低.通过改变硝酸银/PVP比例、加入速率和PVP分子量,可对对银纳米线的长度和直径进行控制,得到了小直径(17~100 nm)、大长度(30 nm到100μm以上)的银纳米线.采用XRD、SEM、TEM和紫外-可见光谱对银纳米线的结构进行了表征.采用不同径长比纳米银线混合,以聚对苯二甲酸二乙酯(PET)和玻璃为衬底,分别使用可扩展层压辅助溶液法和旋转涂布法制备了2种透明导电薄膜,其方阻分别为17和26?/sq,透光率分别为88%和80%.

Preparation of Silver Nanowires by Polyol Method and Comparison of Transparent Conductive Films of Silver Nanowires Coated on PET and Glass Substrate

Different ratios of poly(vinyl)pyrrolidone polymer (PVP) and AgNO3 were used for the production of silver nanowires (AgNWs) by using polyol method1]. PVP was used as the stabilizer and ethylene glycol (EG) was used as the reducing reagent. There are four types of samples which were prepared by using AgNO3/PVP with different ratios: the sample D of AgNWs has a more uniform diameter and less impurity than the others. AgNWs lengths and diameter were controlled by changing the AgNO3/PVP ratio, injection rates and different molecular weight of PVP. We demonstrate that the preparation of AgNWs with a thin diameter (17~100 nm) and long length (30 nm to above 100 μm) were used by polyol method. AgNWs' structures were characterized by XRD, SEM, TEM and UV-vis, respectively. The fabrication of transparent conductive films of poly ethylene terephathalate(PET) and glass substrate using a scalable lamination-assisted solution method and spin-coating process is described in this study. For transparent conductive film of PET and glass substrate, AgNWs inks with a resistance of 17, 26 ?/sq and transmittance of 88%, 80% respectively were produced using a mixture of AgNWs with high and low aspect ratio.