Ionic Salts Boost Perovskite Solar Cell Efficiency and Durability

• Boosting solar power: New ionic salt triples perovskite cell strength, achieving 26.1% efficiency and enhanced durability for a brighter, sustainable future.

Researchers from NREL, KAUST, and other institutions have developed a method to enhance perovskite solar cells by replacing the fullerene layer with an ionic salt, CPMAC. This innovation significantly boosts the cells' performance, efficiency, and durability. The change in the electron transport layer's chemical composition, crucial for moving electrons and generating electricity, resulted in a three-fold increase in mechanical strength, addressing long-term stability issues.

The study, supported by the U.S. Department of Energy, reported a lab efficiency of 26.1% for cells using CPMAC, compared to 25.5% for those with C60. The cells demonstrated minimal degradation over extended operation, indicating a promising path toward commercializing perovskite photovoltaic technologies.

How does CPMAC improve perovskite solar cells compared to traditional fullerene layers?

• Enhanced Efficiency: CPMAC-based perovskite solar cells achieved a higher efficiency of 26.1% compared to 25.5% with traditional fullerene layers, indicating improved electron transport and reduced energy losses.
• Increased Mechanical Strength: The use of CPMAC resulted in a three-fold increase in mechanical strength, which helps in addressing the long-term stability issues commonly associated with perovskite solar cells.
• Improved Durability: Cells with CPMAC showed minimal degradation over time, suggesting enhanced durability and a longer operational lifespan compared to those using fullerene layers.
• Better Electron Transport: The ionic nature of CPMAC improves the electron transport layer's ability to move electrons efficiently, leading to better overall cell performance.
• Potential for Commercialization: The improvements in efficiency, durability, and mechanical strength make CPMAC-based perovskite solar cells more viable for commercial applications, potentially accelerating their adoption in the renewable energy market.
• Chemical Stability: CPMAC provides better chemical stability under operational conditions, reducing the likelihood of degradation due to environmental factors.
• Cost-Effectiveness: The use of CPMAC may reduce production costs by eliminating the need for expensive fullerene derivatives, making perovskite solar cells more economically competitive.