▎ 摘　　要

NOVELTY - An antimony-tin dioxide-silver nanowires/copper-bismuth-sulfur-graphene flexible thin film solar cell preparing method involves depositing poly polystyrene sulfonate into a polyethylene terephthalate substrate, dispersing silver nanowire in a 1-ethyl-3-methylimidazolium tetrafluoroborate and water to obtain silver nanowire dispersion. The dispersion is deposited on poly polystyrene sulfonate, dried to obtain silver nanowire electrode, prepared an electron transport layer of antimony-tin dioxide-silver nanowire and copper-bismuth-sulfur colloidal solution, and added graphene sheets to the colloidal solution, stirred to obtain a copper-bismuth-sulfur-graphene sheet mixed solution. The obtained mixed solution is deposited on the antimony-tin dioxide-silver nanowires electron transport layer to obtain copper-bismuth-sulfur-graphene sheet photosensitive layer, magnetron sputtering deposition of a nickel-oxygen and vapor deposition of a gold counter electrode on hole transport layer. USE - Method for preparing antimony-tin dioxide-silver nanowires/copper-bismuth-sulfur-graphene sheets flexible thin film solar cell. DETAILED DESCRIPTION - An antimony-tin dioxide-silver nanowires/copper-bismuth-sulfur (Cu4Bi4S9)-graphene flexible thin film solar cell preparing method involves depositing poly polystyrene sulfonate onto a polyethylene terephthalate substrate, dispersing silver nanowire in a mixed solution of 1-ethyl-3-methylimidazolium tetrafluoroborate and ultrapure water to obtain silver nanowire dispersion. The dispersion is deposited on poly polystyrene sulfonate and dried to obtain silver nanowire electrode, prepared an electron transport layer of antimony-tin dioxide-silver nanowire, prepared copper-bismuth-sulfur (Cu4Bi4S9) colloidal solution, added pretreated graphene sheets to the copper-bismuth-sulfur (Cu4Bi4S9) colloidal solution and stirred for 12 hours to obtain a copper-bismuth-sulfur (Cu4Bi4S9)-graphene sheet mixed solution. The copper-bismuth-sulfur (Cu4Bi4S9)-graphene sheet mixed solution is deposited on the antimony-tin dioxide-silver nanowires electron transport layer and keeping at 140-160 degrees C for 30-40 hours to obtain the copper-bismuth-sulfur (Cu4Bi4S9)-graphene sheet photosensitive layer and magnetron sputtering deposition of a nickel-oxygen hole transport layer, vapor deposition of an gold counter electrode on the hole transport layer.