Tailoring Crystal Growth Regulation and Dual Passivation for Air-Processed Efficient Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Photovoltaics

Background:

• Perovskite solar cells (PSCs) show promise for next-generation photovoltaics.
• High-efficiency PSC fabrication typically requires inert glove box conditions, increasing costs and hindering scalability.

Purpose of the Study:

• To develop an air-ambient fabrication method for high-efficiency and stable pure α-phase FAPbI3 PSCs.
• To reduce manufacturing costs and facilitate the industrial-scale production of PSCs.

Main Methods:

• Utilized a dual-functional engineering strategy with 3-Guanidinopropionicacid (3-GuA).
• 3-GuA managed excess PbI2 and promoted high-quality FAPbI3 film formation via intermolecular exchange.
• Minimized defects and stabilized perovskite films during fabrication.

Main Results:

• Achieved a power conversion efficiency (PCE) of 24.2% for ambient-air fabricated PSCs.
• Demonstrated negligible hysteresis and excellent device stability.
• Exhibited superior reproducibility in device performance.

Conclusions:

• The developed air-ambient fabrication method enables cost-effective and scalable production of high-performance PSCs.
• 3-GuA is a key additive for improving perovskite film quality and device stability.
• This work provides valuable insights for advancing PSC technology towards commercialization.