Abstract
AbstractThe cover image represents three “NaHCO3” martial artists practice Kung fu— “foaming reaction” in the caves of “PbI2” mountain. The generated CO2 breaks the PbI2 rock and form porous structure, which facilitates the penetration of FAI solutions. The reaction of PbI2 and FAI solution finally forms perovskite. Residual Na+ in perovskite improves crystal quality.In our work, small additive NaHCO3 is used to induce the formation of porous PbI2 by foaming reaction, which facilitates the penetration of the FA+/MA+ ions and the formation of a perovskite film with high crystallinity and large grain. Meanwhile, the introduction of Na+ not only improves the energetic alignment of the PSC, but also increases the conductivity via p‐doping. image
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