This review discusses the ink engineering of slot-die coated perovskite solar cells and modules. The authors summarize the ink engineering of all functional layers based on slot-die processing, including perovskite layers, electron and hole transport, and electrodes. Finally, they gave their views and suggestions for advancing slot-die coated perovskite solar cells and modules. I think it can be accepted for publication with revision.

If possible, I recommend that the authors summarize the slot-die coating of the bottom electrode in Section 3.3.