One-Step Slot-Die Coating Deposition of Wide-Bandgap Perovskite Absorber for Highly Efficient Solar Cells
Before transferring perovskite solar cells technology to commercial applications, it is required to develop ink formulations, guaranteeing high homogeneity over a wide surface and leading to large, defect-free, and well-crystallized perovskite grains to maximize the device performances. A one-step slot-die deposition route, combining ink tailoring and vacuum aspiration solvent extraction, affording the deposition of a high-bandgap multication perovskite, is reported.