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

Solar cell efficiency has dramatically increased from 3.8% in 2009 to 35.5% today. This new crystalline silicon-perovskite tandem cell was independently certified by ESTI. The technology combines two absorbers to capture more of the solar spectrum. Researchers are now focusing on long-term stability and manufacturing scalability.