Homogenizing Fullerene Contacts by Supramolecular Host–Guest Assembly for Stable Perovskite Solar Cells
Fullerene and its derivatives are widely adopted as electron transport layers (ETLs) in high‐performance perovskite solar cells (PSCs). However, fullerene materials are prone to aggregation and rearrangement under environmental stress, which acts as one of the critical factors restricting the long‐term operational...