▎ 摘　　要

NOVELTY - Composite material of iron(II,III) oxide/nickel/nitrogen-doped reduced graphene oxide (N-RGO) solar cell high-efficiency electrode comprises 140-170 pts. wt. ferric nitrate hexahydrate, 20-30 pts. wt. urea, 30-35 pts. wt. nickel nitrate, 100-110 pts. wt. 10-13% oxalic acid solution, 3-5 pts. wt. polyacrylamide, 6-10 pts. wt. epoxy resin E51 and 10-17 pts. wt. graphene oxide. USE - Used as composite material of iron(II,III) oxide/nickel/nitrogen-doped reduced graphene oxide (N-RGO) solar cell high-efficiency electrode. ADVANTAGE - The method: improves PCE through the synergistic effect of iron(II,III) oxide and nickel; introduces NRGO to encapsulate iron(II,III) oxide/nickel to form a finished composite material; achieves high PCE (8.96%); and has significance of the synergistic catalytic performance of metal oxides, metal nanoparticles and N-doped RGO. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite material, comprising (i) mixing ferric nitrate hexahydrate and urea, drying at 160-170 degrees C for 10-12 hours, washing and drying, sintering at 400-450 degrees C for 20-30 minutes and cooling to room temperature to obtain precursor A, (ii) taking nickel nitrate and adding it to 10-13% oxalic acid solution, raising the temperature to 80-90 degrees C, keeping it warm and stirring for 1-2 hours, adding polyacrylamide, raising the temperature to 100 degrees C, dehydrating, and cooling to normal temperature to obtain precursor B, (iii) taking the above-mentioned precursor A and precursor B and mixing, adding epoxy resin E51, keep preheating at 150-170 degrees C for 20-30 minutes, and heating under vacuum at 300-350 degrees C for 1-2 hours to obtain iron(II,III) oxide/nickel, (iv) taking iron(II,III) oxide/nickel and graphene oxide and mixing, adding to deionized water 14-20 times the weight of the mixture, sonicating for 3-5 minutes, adding hydrazine hydrate, placing it into a polytetrafluoroethylene reactor, reacting at 170-175 degrees C for 7-10 hours, cooling to room temperature, filtering with suction, drying at 400-450 degrees C for 20-30 minutes, and cooling to room temperature.