Macrocyclic thiol ligand additive engineering for stable and efficient perovskite solar cells

Abstract

Perovskite solar cells have a rapid development speed and excellent prospects, but still face performance and stability problems for practical applications. Excessive Pb2+ defects often accompany the preparation of perovskite, which greatly affect the performance and stability of perovskite solar cells. Herein, a macrocyclic thiol ligand (DXPSH) is introduced as an additive for organic amine salt. It effectively reduces the defect density of perovskite, induces better crystal orientation of perovskite, and improves carrier lifetime. As a result, the optimized DXPSH-modified PSCs achieves a maximum power conversion efficiency of 24.03 % and good long-term stability in ambient air.