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A comment on Japanese company develops a solar cell with record-breaking efficiency.

Re:Japanese company develops a solar cell with record-breaki... by jhallenworld on Thursday March 23, 2017 @11:27AM (#13940567)
Rectennas are another interesting possibility. The theoretical conversion efficiency is 44% according to this:

http://ecee.colorado.edu/~moddel/QEL/Papers/Joshi13a.pdf

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