Why are perovskite solar cells being called the biggest breakthrough in solar energy in decades?

The answer

Perovskite solar cells, based on a crystal structure first found in the Ural Mountains and named after Russian mineralogist Lev Perovski, have rocketed from 3.8% efficiency in 2009 to over 33.9% in tandem with silicon in 2024 - surpassing the practical limit of silicon-only cells (about 29.4%). Their manufacturing advantage is enormous: perovskites can be deposited from liquid solution at low temperatures, potentially printed like newspaper onto flexible substrates at a fraction of silicon's manufacturing cost. Oxford PV began commercial shipment of perovskite-silicon tandem solar panels in 2024, producing 26.8%-efficient modules. The critical remaining challenge is durability; perovskites degrade when exposed to moisture, heat, and UV light. Oxford PV and others have achieved 25-year stability in accelerated testing, but real-world long-term data is still accumulating.