"Efficient Inverted Perovskite Solar Cells with Double-Sided Heterojunctions"

Researchers have demonstrated the use of long alkyl-amine ligands to create near-phase pure two-dimensional (2D) perovskites at the top and bottom interfaces of three-dimensional (3D) perovskite photo-absorbers, effectively resolving issues related to charge recombination, ion migration, and electric-field inhomogeneities in perovskite solar cells (PSCs). This approach resulted in inverted PSCs with double-side 2D/3D heterojunctions achieving a power conversion efficiency (PCE) of 25.6% and retaining 95% of their initial PCE after 1000 hours of 1-sun illumination at 85 degrees Celsius in air.