Ion Migration in Perovskite Solar Cells

Perovskite solar cells have emerged as leading candidates for next-generation photovoltaic technology due to their high efficiency and low cost. However, ion migration within the perovskite layer can lead to performance degradation and stability issues. Ions, particularly halide ions, can migrate under electric fields or temperature gradients, causing phase segregation and hysteresis in current-voltage curves. Understanding and mitigating ion migration is essential for improving the long-term stability of perovskite solar cells. Strategies include compositional tuning, interface engineering, and the development of new perovskite materials with reduced ion mobility.