Highly Efficient Printed Tin-Based Perovskite Solar via Crystallization Kinetics Regulation

Area of Science:

• Materials Science
• Renewable Energy
• Chemical Engineering

Background:

• Tin-based perovskites offer a lead-free alternative for solar cells but suffer from poor crystallization in printing processes.
• Current printing methods limit perovskite film quality and device performance compared to spin-coating.

Purpose of the Study:

• To develop a crystallization regulation strategy for printed tin-based perovskite solar cells.
• To enhance the nucleation density and crystallization rate during the printing process.
• To improve the power conversion efficiency and stability of printed perovskite solar cells.

Main Methods:

• Guided by crystallization kinetics theory, a novel printing process was designed.
• Acetonitrile was introduced to control nucleation density and match rapid crystallization rates.
• The strategy was applied to fabricate tin-based perovskite solar cells.

Main Results:

• Achieved a power conversion efficiency of 9.64% for printed tin-based perovskite solar cells.
• Demonstrated excellent storage stability, retaining 87% efficiency after 600 hours in nitrogen.
• Showcased robust operational stability under simulated sunlight for 4000 seconds without degradation.

Conclusions:

• The proposed crystallization regulation strategy significantly improves printed tin-based perovskite solar cells.
• This method achieves the highest reported efficiency for printed lead-free perovskite solar cells to date.
• The findings present a viable pathway for the industrialization of lead-free perovskite solar technology.