Co-passivation of perovskite film towards stable and efficient perovskite solar cell

•Improve the hole blocking ability of the perovskite / ETL interface by adding n-type materials into the antisolvent.•Improved J-V performance of devices with additional hole blocking layer.•Combine in-film passivation treatment and bulk passivation treatment to co-passivate perovskite film.•The co-passivation based PSCs achieve a power conversion efficiency (PCE) of 22.70% with high stability.