Vertically oriented 1D/3D heterojunction for efficient and stable inverted perovskite solar cells (opens in new tab)

1D/3D heterostructure perovskite solar cells have attracted considerable attention owing to their exceptional stability. However, conventional 1D perovskites typically align parallel to the substrate or in disordered orientations, hindering longitudinal carrier transport and limiting device efficiency. Here, we introduce a bilayer interface engineering strategy to induce a vertically oriented 1D capping layer on the surface of the 3D perovskite surface. This vertically ordered 1D/3D heterojun...