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Phenethylamine (PEA) was successfully introduced into hole-conductor-free,fully printable mesoscopic MAPbI3 perovskite solar cells (MPSCs) with a carbon electrode by mixing phenethylammonium iodide with MAPbI3 perovskite solution.PEA-MAPbI3 films show better pore filling into TiO2 scaffold that forms better contact,and induce longer exciton lifetime and higher quantum efficiency of photoinduced charge separation.As a result,the power conversion efficiency of PEA-MAPbI3 MPSCs is 37％ higher than that of MAPbI3 MPSCs.And PEA-MAPbI3 MPSCs show excellent long-term stability that could keep 90％ of origin power conversion efficiency for over 80 days in the air.