Back-Contact Perovskite Solar Cell Modules Fabricated via Roll-to-Roll Slot-Die Coating: Scale-Up toward...

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Perovskite solar cells offer high efficiency but face challenges in cost-effective, large-scale manufacturing.
• Current fabrication methods often rely on expensive materials and complex processes.

Purpose of the Study:

• To develop a scalable and cost-effective fabrication method for back-contact perovskite solar cells.
• To investigate the perovskite structure within micro-grooves for optimized device performance.
• To demonstrate a sustainable solar cell technology free from scarce elements.

Main Methods:

• Embossing 1.5 μm-width grooves into plastic films with selective n- and p-type contact coating.
• Depositing perovskite precursor solution into grooves using slot-die coating.
• Characterizing perovskite structure using microscopy and spectroscopy.
• Utilizing roll-to-roll processing for fabrication.

Main Results:

• Successful fabrication of groove-based perovskite solar cell minimodules with hundreds of series-connected devices.
• Demonstrated perovskite structure within grooves suitable for photovoltaic applications.
• Confirmed absence of expensive elements like indium, highlighting sustainability.
• Validated scalability and high-throughput potential through roll-to-roll processing.

Conclusions:

• Groove-based back-contact perovskite solar cells are a scalable, low-cost, and sustainable photovoltaic technology.
• Slot-die coating and roll-to-roll processing enable high-throughput manufacturing.
• This approach offers a viable path towards affordable and efficient solar energy.