fig3

Figure 3. (A) Structural schematic diagram of perovskite planar heterojunction solar cells with polymer thin films as a passive layer^[61]. (B) Schematic diagram of the possible phase evolution of FA-based mixed anion perovskites [FA_0.95MA_0.05Pb(I_0.95Br_0.05)₃] during the film formation with or without FTPA (3-fluoro-4-methoxy-4’,4”c-bis((4-vinyl benzyl ether) methyl) triphenylamine)^[64]. (C) Schematic diagram of suppression mechanism on quasi-Fermi level splitting deficiency in PSCs^[68]. (D) Schematic diagram of perovskite defects distribution and the mechanism of defects passivation by POF-HDDA (octafluoro-1,6-hexanediol diacrylate polymer)^[74].