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2D perovskite solar cells with high stability and high efficiency have attracted significant attention. A systematical static and dynamic structure investigation is carried out to show the details of 2D morphology evolution. A dual additive approach is used, where the synergy between an alkali metal cation and a polar solvent leads to high‐quality 2D perovskite films with sandwich‐type structures...
In article number 2002784, Qin Hu, Haiming Zhu, Feng Liu, and co‐workers use in situ grazing‐incidence wide‐angle X‐ray scattering techniques to study the crystallization kinetics of 2D perovskites and reveal the role of additives in the crystallization process. The synergy between DMSO and KI additives can improve the crystal orientation and effectively passivate defects, owing to the sandwich‐type...
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