▎ 摘　　要

NOVELTY - Preparing multilayer films involves graphene/poly(p-phenylenevinylene)/reduced graphene oxide bilayers adsorbing cationic poly(p-phenylenevinylene) precursor (PPV-pre) on graphene sheet by using ultrasonic treatment to obtain (+) charged graphene poly(p-phenylenevinylene)-precursor dispersion in which graphene is stably dispersed on aqueous medium. The graphene is stably dispersed in aqueous medium, where substrate is soaked in graphene poly(p-phenylenevinylene)-precursor dispersion liquid. The substrate is soaked and coated with graphene poly(p-phenylenevinylene)-precursor. USE - Method for preparing multilayer film as photosensitive material of optoelectronic device and in flexible smart phones, curved digital cameras or flexible thin film displays (all claimed). ADVANTAGE - The method enables to prepare multilayer film which has stabilized the graphene sheet to the poly(p-phenylenevinylene)-precursor, and improved the capacitive property and cycle life. The method helps to improved the performance of device through their combination and synergistic effect. DETAILED DESCRIPTION - Preparing multilayer films involves graphene/poly(p-phenylenevinylene)/reduced graphene oxide bilayers adsorbing cationic poly(p-phenylenevinylene) precursor (PPV-pre) on graphene sheet by using ultrasonic treatment to obtain (+) charged graphene poly(p-phenylenevinylene)-precursor dispersion in which graphene is stably dispersed on aqueous medium. The graphene is stably dispersed in aqueous medium, where substrate is soaked in graphene poly(p-phenylenevinylene)-precursor dispersion liquid. The substrate is soaked and coated with graphene poly(p-phenylenevinylene)-precursor in (-)charged graphene oxide (GO) solution and graphene oxide (GO) is laminated. The reaction is repeated for one or more times to obtain multilayer thin film of graphene/poly(p-phenylenevinylene)-precursor/reduced graphene oxide. The multilayer thin film is chemically treated to obtain graphene/poly(p-phenylenevinylene) and reduced graphene oxide multi-layered thin film. An INDEPENDENT CLAIM is included for a optoelectronic device, which comprises 15 graphene poly(p-phenylenevinylene)/reduced graphene oxide multilayer thin film.