Humidity-Insensitive, Large-Area-Applicable, Hot-Air-Assisted Ambient Fabrication of 2D Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• 2D layered perovskites (LPs) offer potential for high-performance, stable photovoltaic devices.
• Current LP film fabrication relies on strict conditions and non-scalable techniques, hindering commercialization.

Purpose of the Study:

• To introduce a hot-air-assisted ambient fabrication technique for producing high-quality LP films.
• To enable efficient and stable solar cells using scalable, non-spin-coating methods.

Main Methods:

• Hot-air-assisted ambient fabrication technique.
• Synchrotron-based in situ grazing-incidence X-ray diffraction (GIXRD) for in-depth analysis.
• Device fabrication and performance characterization.

Main Results:

• High-quality LP films with excellent crystallinity, orientation, and morphology were achieved.
• The hot air promotes a unique solidification and growth mechanism involving a 3D-like intermediate.
• The optimal LP solar cell achieved a power conversion efficiency of 16.36%, the highest for non-spin-coated LPs.
• Device performance showed insensitivity to processing humidity, and scalability was demonstrated.

Conclusions:

• The hot-air-assisted method is a promising scalable technique for fabricating high-performance 2D LP solar cells.
• This approach addresses key limitations in current LP film processing, facilitating practical applications.
• The developed solar cells exhibit stability and upscalability, crucial for real-world deployment.