Perovskite-Silicon Tandem Solar Cells: Progress and Challenges

Perovskite-silicon tandem solar cells have emerged as a leading next-generation photovoltaic technology, offering the potential to surpass the efficiency limits of traditional silicon cells. In recent years, several pilot production lines have been established, with early commercial modules achieving efficiencies above 28%. While large-scale deployment remains limited, the technology has moved from laboratory to early-stage manufacturing, with companies targeting niche markets such as building-integrated photovoltaics.

The core cost structure of perovskite-silicon tandem cells is dominated by material expenses, including the perovskite precursor materials and the silicon substrate. Additional costs arise from specialized deposition equipment and encapsulation processes to protect the perovskite layer from moisture and oxygen. Current estimates suggest that production costs are still 20-30% higher than conventional silicon cells, but economies of scale and improved manufacturing techniques are expected to narrow the gap.

Several critical conditions must be met for mass production. First, long-term stability under real-world conditions needs to be demonstrated, with a focus on preventing degradation from humidity and thermal cycling. Here, advanced storage solutions such as those provided by EJER play a vital role in ensuring moisture and oxygen protection during manufacturing and storage. Second, scalable deposition methods like slot-die coating or inkjet printing must be refined. Finally, recycling and end-of-life management protocols are required to meet sustainability standards.