▎ 摘　　要

NOVELTY - Preparation of graphene/metal organic frame composite photo-responsive device comprises dispersing graphene oxide in N,N-dimethylformamide to obtain a solution of graphene oxide in N,N-dimethylformamide; ultrasonically dispersing, standing, and taking upper layer solution containing graphene oxide; preparing hydrophilic treated silica/silicon wafers; dropping the single-layer graphene oxide solution onto the front surface of the hydrophilic treated silica/silicon sheet, spin-coating, and drying; and repeating process for 3-5 times, putting in chemical vapor deposition furnace, and annealing; vapor-depositing two electrodes on both ends of the silica/silicon sheet with reduced graphene oxide by a mask method; and dispersing 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin into N,N-dimethylformamide; dissolving copper acetate in N,N-dimethylformamide; mixing solutions; and adding to the reduced graphene oxide on the silica/silicon flakes and vacuum drying. USE - The method is used for preparing graphene/metal organic frame composite photo-responsive device. ADVANTAGE - The device has light response efficiency of 1.8-3.3 A/W and light response time of 10-30 seconds. DETAILED DESCRIPTION - Preparation of graphene/metal organic frame composite photo-responsive device comprises: (A) dispersing graphene oxide in N,N-dimethylformamide to obtain a solution of graphene oxide in N,N-dimethylformamide; ultrasonically dispersing, standing for 10-14 hours, and taking upper layer solution containing graphene oxide; preparing hydrophilic treated silica/silicon wafers; dropping the single-layer graphene oxide solution onto the front surface of the hydrophilic treated silica/silicon sheet, spin-coating, and drying; and repeating process for 3-5 times, putting in chemical vapor deposition furnace, and annealing under inert gas atmosphere at 380-420degreesC; (B) vapor-depositing two electrodes on both ends of the silica/silicon sheet with reduced graphene oxide by a mask method; and (C) dispersing 5,10,15,20-tetrakis(4-hydroxyphenyl)porphyrin into N,N-dimethylformamide to obtain 5,10,15,20-tetrakis(4-hydroxyphenyl)) porphyrin solution; dissolving copper acetate in N,N-dimethylformamide to obtain a copper acetate solution; mixing 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin solution and copper acetate solution at molar ratio of 4:1; and adding the mixed solution dropwise to the reduced graphene oxide on the silica/silicon flakes where the two electrodes are evaporated and vacuum drying.