▎ 摘　　要

The photoconductive properties of a uniform ultrathin multilayer film composed of alternating poly(p-phenylene vinylene) (PPV) and reduced graphene oxide (RGO) layers, fabricated on a poly(ethylene terephthalate) (PET) sheet are reported. The assembly of the two electron-rich layer components on the temperature-sensitive substrate is realized using a layer-by-layer-deposition technique under mild conditions and HI/H2O vapor treatment at 100 degrees C. This protocol is established to simultaneously convert the layer components to their conjugated counterparts, PPV and RGO in the multilayer films, whose total thicknesses shrinks to 50% of their original values due to lattice contraction. Furthermore, the surface roughness decreases significantly, in contrast to the results obtained from general chemical treatments. The PET sheets coated with (PPV/RGO)(15) films exhibit a photocurrent of 115 A at an illumination intensity of 1.1 mW and a photoresponsivity of 111.1 mA W-1 at an illumination intensity of 0.5 mW; these are among the best values yet achieved in carbon-based materials. The establishment of a method for fabricating (PPV/RGO) films on a temperature-sensitive transparent flexible sheet is crucial for the development of organic-based portable electronic devices.