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Re:Japanese company develops a solar cell with record-breaki... by smdz on Thursday March 23, 2017 @10:00AM (#13939755)
This is a good question - And this is a partial answer (from a link above): https://news.ycombinator.com/item?id=13939399

Not sure why you were downvoted. Seems like this community is showing signs of academic elitism

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