In 2009, scientists began with a 3.8% perovskite solar cell. 17 years later, LONGi's silicon-perovskite tandem set a 35.5% world record

In 2009, a new type of solar cell could convert just 3.8% of incoming sunlight into electricity. At the time, perovskite solar technology was still a fragile laboratory experiment.

Seventeen years later, LONGi says its research team has reached 35.5% power-conversion efficiency with a crystalline silicon-perovskite tandem solar cell, as per a report. The result was independently certified by the European Solar Test Installation, or ESTI.