Impact of electron transport layer uniformity on field-induced degradation of inverted perovskite solar cells.

[Display omitted] The impact of different electron transport layers (ETLs) based on fullerene derivatives, such as the well-known PC 61 BM and promising 3-pyridyl-substituted pyrrolidino[60]fullerene (PYF-30), on the electric field-induced degradation of inverted perovskite solar cells has been demonstrated. Devices assembled using PYF-30 and PC 61 BM deposited from deuterated chloroform exhibit significantly higher stability compared to PC 61 BM films deposited from chlorobenzene. The main reason for the decrease in the efficiency of the device during aging is the formation of pinhole-type defects in the ETL caused by the agglomeration of molecules of fullerene derivatives. [ABSTRACT FROM AUTHOR]