Synergistic Anion‐π Interaction With an Electron‐Deficient Porphyrin Stabilizes Perovskite for High‐Performance Printable Carbon‐Electrode Mesoscopic Solar Cells
The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has progressed rapidly, but operational stability under light and thermal stresses remains a critical challenge, largely due to the migration of weakly bound iodide ions at the lattice terminations. Here, we introduce an electron‐deficient macrocy...