Solar power cells have raced past the key milestone of 30% energy efficiency, after innovations by multiple research groups around the world. Chinese company LONGi, the world’s biggest producer of solar cells, announced in June they had reached 33.5% in their research. China is one of the leaders in the race to high solar efficiency. The Oxford PV cell was made on the same production line as conventional silicon-only cells, making the large-scale production of tandem cells far easier. One issue that remains to be resolved is how fast the tandem cells degrade over time in real-world conditions.

Source: The Guardian July 08, 2023 00:26 UTC