An <i>in situ</i> cross-linked 1D/3D perovskite heterostructure improves the stability of hybrid perovskite solar cells for over 3000 h operation

An <italic>in situ</italic> cross-linked 1D/3D perovskite heterostructure achieved a perovskite solar cell with a 21.19% PCE and operational stability over 3000 hours.