In this draft, the authors discussed ink engineering of slot-die-coating in the fabrication of different layers of PSCs and perovskite minimodules. Thoughts and recommendations for the slot die processing of perovskite solar cells/minimodules were also proposed at the end of the draft. The review is well organized and can be accepted after minor corrections.
1. Reference labeling and reference format should meet the requirement of the journal
2. It is better if there is a separate list of abbreviations for the chemicals before/at the end of the article.
3. Double-check the spelling and subscript of chemicals, such as page11 BMIMBF4;page 12 DMF-MNP
4. In Figure 2b, the Crystal growth of FACs perovskite affected by (a) NMP and (b) DPSO was shown; but was not discussed in detail in the main text.
5. The perovskite device is composed of many layers with different thicknesses. Both advantages and disadvantages of Slot-die coatings/wet coating methods should be briefly discussed. To solve the challenges of solution processing of the perovskite devices, slot -die can be combined with other coating/printing techniques to produce the whole device.

Accept as it is.