Stopping the Leak: A New Layer Makes Solar Cells Safer and More Efficient

Perovskite solar cells (PSCs) are a frontrunner in the next generation of renewable energy, but they face persistent challenges regarding stability and the potential leakage of toxic lead. To combat this, scientists have engineered a new multifunctional porous layer using a material called FJSM-BZA, a cluster based on barium, zinc, and antimony oxides. This innovative layer is placed at the interface between the cell's components to smooth the transition of electrical charges.

The study demonstrates that FJSM-BZA successfully optimises the alignment of energy levels and repairs atomic-scale flaws, known as defects, within the device’s layers. Consequently, the modified cells achieved a remarkable power conversion efficiency of 25.72%. Beyond raw performance, the material proved highly durable; unsealed devices maintained over 90% of their initial efficiency after 2000 hours of ageing in air. Crucially, FJSM-BZA acts as a chemical trap, adsorbing lead ions to prevent leakage. This development offers a robust strategy for creating solar technology that is not only high-performing but also environmentally responsible.