石墨烯具有独特的电学性能、优异的机械延展性和良好的化学稳定性, 是制备高性能导电薄膜的理想材料, 但是当前石墨烯的高电阻率限制了它的实际应用。本文采用喷涂方法制备了石墨烯/聚(3,4-亚乙二氧基噻吩)-聚(苯乙烯磺酸) (PEDOT∶PSS)复合导电薄膜, 对复合薄膜的表面形貌与光电性能进行了研究。PEDOT∶PSS的引入不仅降低了石墨烯薄膜的表面电阻, 同时还平滑了薄膜表面。在此基础上, 成功制备了柔性黄光有机电致发光器件, 器件在12 V时达到效率最大值0.9 cd/A。器件在曲率半径为10 mm时弯曲了100次后, 发光亮度并无明显变化。该复合薄膜可实际应用于柔性有机电致发光显示器件。

Graphene is an ideal material for the preparation of high performance conductive film because of its unique electrical properties, excellent mechanical ductility and good chemical stability. This paper presents the preparation of a double-layered graphene/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT∶PSS) conductive film, in which the PEDOT∶PSS film was fabricated by using spray-coating technique. The surface morphology, optical and electrical properties of the double-layered conductive films were investigated. PEDOT∶PSS can not only reduce the surface resistance of the graphene films, but also smooth the film surface. Flexible organic light-emitting diodes based on the double-layered film were fabricated, and the current efficiency increased with the voltage and reached its maximum of 0.9 cd/A when the voltage was 12 V. The device luminance did not show obvious degradation after 100 times bending with a radius of curvature of 10 mm. The hybrid films hold promise for the practical application of FOLEDs.