A universal ligand for lead coordination and tailored crystal growth in perovskite solar cells
Bowen Yang, Jiajia Suo, Dmitry Bogachuk, Waldemar Kaiser, Clemens Baretzky, Oussama Er‐raji, Georgios Loukeris, Asma A. Alothman, Edoardo Mosconi, Markus Kohlstädt, Uli Würfel, Filippo De Angelis, Anders Hagfeldt
Abstract
complexes in the perovskite precursor, forming new intermediate species. These strong interactions effectively retard the perovskite crystallization process and form homogeneous films with enlarged grain sizes and reduced density of defects. In combination with an interfacial treatment, the resulted champion devices exhibit a 24.6% efficiency with outstanding operational stability. Unprecedently, PGua can be applied in various PSCs with different perovskite compositions and even in both configurations: n-i-p and p-i-n, highlighting the universality of this ligand.