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Antisolvent effects in green solvent engineering of FA-based quasi-2D Ruddlesden–Popper perovskite films for efficient solar cells

“…It has a threshold limit value (TLV) of 300 ppm, which is much larger than chlorobenzene (10 ppm) and toluene (50 ppm). 29 We found that PE with a lower polarity is more suitable for preparing perovskite films with large grains, a smooth surface and fewer defects. Thus, with a typical configuration of ITO/PTAA/perovskite/PCBM/BCP/Ag, we obtained a champion PCE of 17.42%, which is the highest among FA-based quasi-2D perovskite devices with a perovskite layer prepared in an all-green solvent system.…”