Modified lead-free silver slurry of a kind of graphene and preparation method thereof

Modified lead-free silver slurry of a kind of graphene and preparation method thereof, it is related to a kind of silver paste and preparation method thereof.The problem of the purpose of the present invention is to solve electrocondution slurries needed for existing crystal silicon solar batteries to contain heavy metal lead substantially, has a negative impact expensive with unleaded electrocondution slurry to human body and environment, is unfavorable for use of large-scale production.A kind of modified lead-free silver slurry of graphene is prepared by 75 parts~90 parts Ag powder, 1 part~4.5 parts glass powders, 8 parts~25 parts organic carriers and 0.01 part~0.14 part graphene in parts by weight.The modified lead-free silver slurry preparation method for material of graphene is, method 1.: one, weighing；Two, 1. or 2. method prepares the modified lead-free silver slurry of graphene using method.The conversion ratio of polysilicon solar cell made from the modified lead-free silver slurry of graphene prepared by the present invention reaches 18.4%.The present invention can get a kind of modified lead-free silver slurry of graphene.