Efficient two-dimensional Cs₂PbI₂(SCN)₂ perovskite solar cells via intermediate-modulated crystallization

Abstract

All-inorganic two-dimensional (2D) Cs2PbI2(SCN)2 perovskite has a smaller layer spacing than that of conventional cation-induced 2D perovskite and may have potential applications in photoelectronic devices. To achieve high device efficiency,...

Fabrication strategies for high quality halide perovskite films in solar cells

“…In another work, Xu et al produced 2D Cs 2 PbI 2 (SCN) 2 by adding FACl into the precursor solution, which could induce the formation of the Cs 2 PbI 2− x Cl x (SCN) 2 intermediate. 58 This intermediate could slow down the crystallization rate and passivate the I − vacancies. The perovskite films with FACl showed less defect density and larger grain sizes than the pristine ones.…”