Efficient Blade‐Coated Wide‐Bandgap and Tandem Perovskite Solar Cells via a Three‐Step Restraining Strategy

Blade-coating techniques have attracted significant attention for perovskite solar cells (PSCs) due to their high precursor utilization and simplicity. However, the power conversion efficiency (PCE) of blade-coated PSCs often lags behind that of spin-coated devices, mainly due to difficulties in precisely controlling perovskite film formation during pre-nucleation, heterogeneous nucleation, and crystallization in the blade-coating and N