A regenerable redox mediator for all-air processed wide-bandgap perovskite solar cells under high-humidity conditions

Key Points

• Devices achieved a peak efficiency (PCE) of 23.16% under 65% relative humidity conditions,
• Integration of 4-mercaptophenylacetic acid into a perovskite precursor enhanced device performance,
• Ambient air processing demonstrates a viable approach for fabricating solar cells.
• Findings may enable advancements in solar technology under adverse environmental conditions.