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Longi achieves 34.6% efficiency for two-terminal tandem perovskite solar cell prototype
(www.pv-magazine.com)
This is a most excellent place for technology news and articles.
Interesting. Cost is also very important for large scale deployment of course. I wonder if this stuff can become competitive in $ per watt with the current silicon cells.
I've seen them say their solar panels will provide more energy for the same amount of land at a lower cost.
But it doesn't seem like their prices are publicly available yet.