摘要： Employing all-inorganic perovskite quantum dots (QDs) to treat the organic-inorganic perovskite film has well-documented as a serviceable tactics to improve the performance of perovskite solar cells (PSCs). Whereas the inert molecules-coated QDs with zero dimension (0D) structure would limit further enhancement of the efficiency and stability of PSCs. Here we employ a conductive diammonium porphyrin (ZnPy-NH3Br) to treat CsPbBr3 QDs coated on 3D perovskite film, thus constructing a stable 0D-2D perovskite capping layer. The generation of large-scale nanocube crystals by treating CsPbBr3 nanocrystallites with ZnPy-NH3Br in solution demonstrates such an assembly strategy. The formed capping layer can achieve efficient charge transport and separation. As a consequence, the best efficiency of optimized device is up to 20.0%, which is superior to the control PSCs fabricated without modification (19.1%) and with pure CsPbBr3 QDs modification (19.5%). More importantly, the porphyrin-treated CsPbBr3 QDs based devices retain over 65% or 85% of their initial efficiency when placed at 85 °C or 45% humidity tracking for 1000 h, respectively. And also, with the QDs-Por incorporated, the device retained 85% of the original efficiency when illuminated at the AM 1.5 G for 450 h. Therefore, this work offered a facile avenue to modify perovskite film for fabricating the highly efficient and stable PSCs.