What is 'perovskite solar cells' and their potential advantage over traditional silicon cells?

• A. Perovskite solar cells are outdated and rarely used.
• B. Perovskite solar cells are identical to silicon cells.
• C. Perovskite solar cells have lower efficiency potential.
• D. Perovskite solar cells are a class of materials with high efficiency potential and lower manufacturing costs, but face stability and durability challenges.

Answer: (D)

Perovskite solar cells are a class of photovoltaic materials that use a perovskite-structured compound to convert sunlight into electricity. They offer high efficiency potential and can be manufactured with simpler, lower-cost processes because many perovskite formulations can be deposited from solution at relatively low temperatures, enabling manufacturing methods like printing or coating on flexible substrates. This makes them attractive for lowering production costs compared to traditional silicon.

A key advantage is the potential to achieve high efficiencies, even in tandem with silicon cells, where the perovskite layer can boost overall performance without requiring expensive processing steps. However, they face important challenges: stability and durability under real-world operating conditions (moisture, heat, and UV exposure can degrade the material over time), and concerns around lead content and environmental impact. These issues mean continued research is needed to ensure long-term performance and safe deployment.

So, the best description is that perovskite solar cells are a class of materials with high efficiency potential and lower manufacturing costs, but they face stability and durability challenges.