Impact of halide additives on green antisolvent and high-humidity processed perovskite solar cells

Abstract Organometal halide perovskites have recently gained remarkable interest as a light absorber for photovoltaic technology. However, the majority of efficient perovskite solar cells (PSCs) are fabricated in glovebox. From mass production perspective, it is vital to improve quality ambient-processed perovskite, well reduce health risks, costs, and complexity fabrication. This study investigates effect using green antisolvent ethyl acetate with various additives on performance planar PSCs by one-step deposition method, under high relative humidity (RH) 50–60%. Differences microstructures, crystallinity, surface chemistry optoelectronic properties films addition PbCl2, PbBr2, MAI observed, compared pristine film. Ambient-processed PbCl2 remarkably improves PCE device 17.3% achieves fill factor up 76.3%. Addition also enhances stability devices retains 81% their initial PCEs after storage ambient air 28 days. These findings provide strategy fabrication high-quality without need