This manuscript is quite interesting. The authors have introduced imidazolium (IA) cations into the A-site of the perovskite, which not only regulates the lattice properties and crystallization process but also effectively passivates various defects. This approach has achieved a uniform distribution of halides and significantly reduced defect density. As a result, the single-junction wide-bandgap perovskite solar cell has reached 19.50% PCE and 1.35 VOC. Furthermore, by integrating these perovskite devices into a monolithic perovskite-organic tandem solar cell as the wide-bandgap subcell, a PCE of 25.54% has been achieved. However, there are still some unclear statements that need to be explained before the manuscript can be considered for publication.
1.Why choose to Cs0.2FA0.8Pb (I0.6Br0.4) 3 perovskite as control? Will there be significant differences in the effect of doping various cations on crystallization in other components.
2.The author mentioned that EA, GA, and IA can theoretically form alloy structures. Why was the influence of EA not discussed in XRD testing.
3.What determines the concentration of IA added to target devices.
4.How is the stability of the tandem solar cell.
5.How effective are the integration of these PSCs with silicon-based back cells?Could these wide bandgap PSCs also achieve high PCE when combined with silicon-based cells?

The paper has substantially been enhanced after the first revision. There are only a few concerns to be addressed:
1． While the authors have adopted the perovskite/organic solar cell structure and achieved an efficiency of over 25%, and have also added a discussion on the advantages of the perovskite/organic solar cell structure in the revised manuscript, this is not sufficient to pique the substantial interest of EES readers.
2． Due to the randomness in TRPL results, did the authors test multiple samples to ensure the reliability of their findings?
3． The authors mention the reduction of defect density, but they have not employed any characterization methods to quantitatively substantiate this conclusion.