▎ 摘　　要

NOVELTY - Preparing perovskite graphene composite comprises adding formamidinium lead and lead(II) bromide into the solvent to obtain a perovskite precursor solution of 0.5-3 mol/l, adding 20-100 mg graphene into 50 ml toluene and sonicating for 20-60 minute to obtain a graphene suspension, taking 5-15 ml above graphene suspension and magnetically stirring, dropping 10-150 mu l perovskite precursor liquid into the graphene suspension under stirring for 10-20 hours and drying. USE - The graphene composite is useful in the field of solar cells or degrading organic matter (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for perovskite graphene composite prepared by as mentioned above.