柔性AgNWs/PEDOT:PSS-PET透明导电薄膜的制备与性能

Flexible AgNWs/PEDOT:PSS Transparent Conductive Film Prepared by Spraying Method and the Properties Research

透明导电薄膜由于兼具较高的透光度和较低的电阻率,被广泛地应用在太阳能电池、传感器和柔性OLED等光电子器件中。采用多元醇法制备了长径比约为1 200的银纳米线(AgNWs),并且,与PEDOT∶PSS相结合,以聚对苯二甲酸乙二醇酯(PET)为透明导电薄膜基底,通过简单、高效的喷涂工艺制备AgNWs/PEDOT∶PSS-PET复合柔性透明导电薄膜,并且,研究其表面形貌与材料结构。然后,对薄膜进行了后处理,提高薄膜的导电性,并且,利用拉曼(Raman)光谱分析了进行后处理后,薄膜导电性提高的原因。当该复合薄膜在透光率<85%时,其面电阻<50Ω/sq,而且,薄膜的粗糙度仅为11.3 nm。另外,经过700 h的空气气氛放置试验后,薄膜的面电阻基本保持不变,仍具有较好的稳定性。

Transparent conductive films were widely used in photovoltaic devices such as solar cells,sensors and flexible OLED due to their high light transmittance and low resistivity.Polyethylene terephthalate(PET)was chosen as the matrix of transparent conductive films,and silver nanowires(AgNWs)with a diameter ratio of about 1200 were prepared by polyol method and combined with PEDOT∶PSS to prepare AgNWs/PEDOT∶PSS-PET flexible transparent conductive film by simple and efficient spraying process,and the morphologies and structure of the composite films were studied.Subsequently,the film was post-treated to improve the electrical conductivity,and Raman test was performed to investigate the reason for the improvement of electrical conductivity.The composite film in transmittance85%,the surface resistance 50Ω/sq and the roughness of the film was only 11.3 nm.In addition,the sheet resistance of the film was basically unchanged after 700 h air atmosphere placement test,with good stability.